Metal mine tailings (MMT) are a kind of industrial solid waste, with an increasing accumulation year by year, which has seriously damaged the ecological environment. Incorporating MMT in ultra-high performance concrete (UHPC) is an effective means to achieve green sustainable development, which can not only make wastes be resources and prevent pollution but also save raw material costs and reduce energy consumption. However, metal mine tailings contain complex and diverse metal oxides and other chemical substance and even contain certain radioactive elements and heavy metal ions. These factors can affect the corrosion resistance of UHPC, accelerate its aging and damage, and in addition may have serious impacts on the environment and human health. This paper summarizes the material properties of MMT and its application in UHPC; analyzes the effects of MMT as powder or fine aggregate on the workability, mechanical properties, durability, and leaching toxicity of UHPC; and elaborates the hydration products, interfacial transition zone, and pore structure of UHPC incorporating MMT (MMT-UHPC). Based on previous research results, the relationship between flowability, flexural strength, porosity, and compressive strength of MMT-UHPC is established.
{"title":"Ultra-high performance concrete with metal mine tailings and its properties: a review","authors":"Qiuming Li, Xiaoxin Feng, Yue Liu, Yuan Jia, Gang Liu, Yuantao Xie","doi":"10.1515/corrrev-2023-0145","DOIUrl":"https://doi.org/10.1515/corrrev-2023-0145","url":null,"abstract":"\u0000 Metal mine tailings (MMT) are a kind of industrial solid waste, with an increasing accumulation year by year, which has seriously damaged the ecological environment. Incorporating MMT in ultra-high performance concrete (UHPC) is an effective means to achieve green sustainable development, which can not only make wastes be resources and prevent pollution but also save raw material costs and reduce energy consumption. However, metal mine tailings contain complex and diverse metal oxides and other chemical substance and even contain certain radioactive elements and heavy metal ions. These factors can affect the corrosion resistance of UHPC, accelerate its aging and damage, and in addition may have serious impacts on the environment and human health. This paper summarizes the material properties of MMT and its application in UHPC; analyzes the effects of MMT as powder or fine aggregate on the workability, mechanical properties, durability, and leaching toxicity of UHPC; and elaborates the hydration products, interfacial transition zone, and pore structure of UHPC incorporating MMT (MMT-UHPC). Based on previous research results, the relationship between flowability, flexural strength, porosity, and compressive strength of MMT-UHPC is established.","PeriodicalId":10721,"journal":{"name":"Corrosion Reviews","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2024-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140995733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-03DOI: 10.1515/corrrev-2023-0119
Guilin Zhou, Jingchuan Wang, Wenjie Cheng, Hui Nan, Xiaochong Zhao, Haomin Wei, Caihong Xue, Yuehua Ma, Pan Yang
Organic–inorganic hybrid coating has been applied on metallic corrosion protection effectively. Molybdenum disulfide (MoS2) nanosheets with graphene-like two-dimensional lamellar structure were an anticorrosion inorganic additive, rendering the organic coating better corrosion resistant. However, the aggregation and poor solubility are still current issues that should be addressed. Functionalization MoS2 nanosheets with surface modified by polydopamine (PDA) and silane coupling agent (KH560) were prepared in polyurethane (PU) composite coatings to obtain dense and intact multilayer network structure coatings for corrosion protection. KH560-PDA-MoS2/PU coating with crosslinked polymer network structure has a high impedance modulus, large contact angle, and strong hydrophobicity. The coating meets the national technical standards for salt spray testing and nitric acid (HNO3) titration testing, demonstrating excellent corrosion resistance.
{"title":"Surface modified molybdenum disulfide nanosheets for corrosion resistance improvement on polyurethane coatings","authors":"Guilin Zhou, Jingchuan Wang, Wenjie Cheng, Hui Nan, Xiaochong Zhao, Haomin Wei, Caihong Xue, Yuehua Ma, Pan Yang","doi":"10.1515/corrrev-2023-0119","DOIUrl":"https://doi.org/10.1515/corrrev-2023-0119","url":null,"abstract":"\u0000 Organic–inorganic hybrid coating has been applied on metallic corrosion protection effectively. Molybdenum disulfide (MoS2) nanosheets with graphene-like two-dimensional lamellar structure were an anticorrosion inorganic additive, rendering the organic coating better corrosion resistant. However, the aggregation and poor solubility are still current issues that should be addressed. Functionalization MoS2 nanosheets with surface modified by polydopamine (PDA) and silane coupling agent (KH560) were prepared in polyurethane (PU) composite coatings to obtain dense and intact multilayer network structure coatings for corrosion protection. KH560-PDA-MoS2/PU coating with crosslinked polymer network structure has a high impedance modulus, large contact angle, and strong hydrophobicity. The coating meets the national technical standards for salt spray testing and nitric acid (HNO3) titration testing, demonstrating excellent corrosion resistance.","PeriodicalId":10721,"journal":{"name":"Corrosion Reviews","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2024-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141016364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-03DOI: 10.1515/corrrev-2023-0058
Muhammad Taqi-uddeen Safian, Bothi Raja Pandian, M. N. Mohamad Ibrahim
The fundamental process of drilling within the oil and gas industry appears straightforward, entailing the creation of a borehole that connects to the underlying oil reservoir. An indispensable component in this operation is the mud formulation, playing a critical role in lubricating the drill bit and facilitating the efficient removal of cuttings. However, a notable challenge arises due to the machinery’s predominantly metal composition, leading to corrosion concerns. Various strategies, including the application of corrosion inhibitors, have been introduced to address and manage this corrosion challenge. This review provides a comprehensive exploration of recent research endeavors focused on corrosion inhibitors in the context of offshore drilling operations. It aims to offer insights into the diverse types of corrosion commonly encountered during drilling activities in marine environments. Moreover, the review delves into an in-depth examination of various corrosion inhibitors utilized for mitigation, shedding light on their performance characteristics and limitations within the specific scope of drilling operations. By scrutinizing these corrosion inhibition strategies, the review contributes to a nuanced understanding of the evolving landscape in drilling technology and the measures taken to ensure the longevity and efficiency of drilling equipment.
{"title":"The importance and evolution of corrosion inhibitors in the drilling fluid for the offshore drilling industry","authors":"Muhammad Taqi-uddeen Safian, Bothi Raja Pandian, M. N. Mohamad Ibrahim","doi":"10.1515/corrrev-2023-0058","DOIUrl":"https://doi.org/10.1515/corrrev-2023-0058","url":null,"abstract":"\u0000 The fundamental process of drilling within the oil and gas industry appears straightforward, entailing the creation of a borehole that connects to the underlying oil reservoir. An indispensable component in this operation is the mud formulation, playing a critical role in lubricating the drill bit and facilitating the efficient removal of cuttings. However, a notable challenge arises due to the machinery’s predominantly metal composition, leading to corrosion concerns. Various strategies, including the application of corrosion inhibitors, have been introduced to address and manage this corrosion challenge. This review provides a comprehensive exploration of recent research endeavors focused on corrosion inhibitors in the context of offshore drilling operations. It aims to offer insights into the diverse types of corrosion commonly encountered during drilling activities in marine environments. Moreover, the review delves into an in-depth examination of various corrosion inhibitors utilized for mitigation, shedding light on their performance characteristics and limitations within the specific scope of drilling operations. By scrutinizing these corrosion inhibition strategies, the review contributes to a nuanced understanding of the evolving landscape in drilling technology and the measures taken to ensure the longevity and efficiency of drilling equipment.","PeriodicalId":10721,"journal":{"name":"Corrosion Reviews","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2024-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141016637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-03DOI: 10.1515/corrrev-2023-0126
Yingwei Song, Xiaozhen Liu, En-Hou Han
The microstructure of three rolling surfaces of TC4 sheet is different, and their resistance ability to hydrogen damage lacks systematic research. Thus, the hydrogen damage behavior of TC4 rolling sheet was investigated in this paper. The hydrogen diffusion law along different rolling directions and the precipitation of hydrides on different rolling surfaces were compared. It is found that the shape and distribution of α and β phases are changed under the action of extrusion force during the rolling process, and they are arranged in striped shape on the R-N surface along the R direction, and the diffusion of hydrogen along the R direction is faster due to the existence of continuous β phases as hydrogen diffusion channels, resulting in the more serious hydrogen damage. Besides the hydrides mainly deposited at the α and β phase boundaries, the hydrides precipitated in the interior of α phases on the R-N surface are more than that on the R-T surface due to the different distribution state of β phases.
{"title":"Comparison of the hydrogen damage of different rolling surfaces of TC4 Ti alloy sheet","authors":"Yingwei Song, Xiaozhen Liu, En-Hou Han","doi":"10.1515/corrrev-2023-0126","DOIUrl":"https://doi.org/10.1515/corrrev-2023-0126","url":null,"abstract":"\u0000 The microstructure of three rolling surfaces of TC4 sheet is different, and their resistance ability to hydrogen damage lacks systematic research. Thus, the hydrogen damage behavior of TC4 rolling sheet was investigated in this paper. The hydrogen diffusion law along different rolling directions and the precipitation of hydrides on different rolling surfaces were compared. It is found that the shape and distribution of α and β phases are changed under the action of extrusion force during the rolling process, and they are arranged in striped shape on the R-N surface along the R direction, and the diffusion of hydrogen along the R direction is faster due to the existence of continuous β phases as hydrogen diffusion channels, resulting in the more serious hydrogen damage. Besides the hydrides mainly deposited at the α and β phase boundaries, the hydrides precipitated in the interior of α phases on the R-N surface are more than that on the R-T surface due to the different distribution state of β phases.","PeriodicalId":10721,"journal":{"name":"Corrosion Reviews","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2024-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141016013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-01DOI: 10.1515/corrrev-2024-0012
Rui Ding, Xue-qi Zhang, Qing‐xian Yue, Jing Lv, Jie Liu
Reinforced concretes are the primary materials in coastal and offshore engineering. In alkaline environment of concrete, the anodic process is passivation of rebars and the conjugated cathodic process is oxygen reduction reaction (ORR). It is proposed that a novel approach to enhance the passivation films through catalyzed ORR by iron meso-tetra(4-carboxyphenyl)porphine (FeTCPP). The ORR catalyst FeTCPP promotes the formation of passivation film, as it accelerates the consumption of abundant electrons generated and accumulated by the anodic formation of passivation films. The passivation films of rebars are highly defective Fe3O4 semiconductor. The dissolution of interstitial ferrous ions and lattice iron ions produces defects of O ion vacancies, Fe ion vacancies and interstitial Fe ions, and they further cause the formation and accumulation of Fe atom vacancies on the metal surface, leading to the collapse of the passivation films. The FeTCPP adsorbs on the surface of passivation films, hindering the dissolution of lattice iron ions and interstitial ferrous ions, thereby inhibiting the generation and accumulation of Fe atom vacancies and improving the integrity and protective ability of the passivation films.
钢筋混凝土是海岸和近海工程的主要材料。在混凝土的碱性环境中，阳极过程是钢筋的钝化，共轭阴极过程是氧还原反应（ORR）。有人提出了一种新方法，通过介四（4-羧基苯基）卟吩铁（FeTCPP）催化 ORR 来增强钝化膜。ORR 催化剂 FeTCPP 能促进钝化膜的形成，因为它能加速消耗钝化膜阳极形成过程中产生和积累的大量电子。钢筋的钝化膜是高度缺陷的 Fe3O4 半导体。间隙亚铁离子和晶格铁离子的溶解产生了 O 离子空位、Fe 离子空位和间隙 Fe 离子的缺陷，并进一步导致金属表面 Fe 原子空位的形成和积累，从而导致钝化膜的坍塌。FeTCPP 吸附在钝化膜表面，阻碍了晶格铁离子和间隙亚铁离子的溶解，从而抑制了铁原子空位的产生和积累，提高了钝化膜的完整性和保护能力。
{"title":"Enhanced corrosion protection of rebars in alkaline solutions by ferroporphyrin and the mechanisms of electron consumption and lattice reconstruction","authors":"Rui Ding, Xue-qi Zhang, Qing‐xian Yue, Jing Lv, Jie Liu","doi":"10.1515/corrrev-2024-0012","DOIUrl":"https://doi.org/10.1515/corrrev-2024-0012","url":null,"abstract":"\u0000 Reinforced concretes are the primary materials in coastal and offshore engineering. In alkaline environment of concrete, the anodic process is passivation of rebars and the conjugated cathodic process is oxygen reduction reaction (ORR). It is proposed that a novel approach to enhance the passivation films through catalyzed ORR by iron meso-tetra(4-carboxyphenyl)porphine (FeTCPP). The ORR catalyst FeTCPP promotes the formation of passivation film, as it accelerates the consumption of abundant electrons generated and accumulated by the anodic formation of passivation films. The passivation films of rebars are highly defective Fe3O4 semiconductor. The dissolution of interstitial ferrous ions and lattice iron ions produces defects of O ion vacancies, Fe ion vacancies and interstitial Fe ions, and they further cause the formation and accumulation of Fe atom vacancies on the metal surface, leading to the collapse of the passivation films. The FeTCPP adsorbs on the surface of passivation films, hindering the dissolution of lattice iron ions and interstitial ferrous ions, thereby inhibiting the generation and accumulation of Fe atom vacancies and improving the integrity and protective ability of the passivation films.","PeriodicalId":10721,"journal":{"name":"Corrosion Reviews","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141029332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The effect of the recrystallization degree on the properties of passive films formed in 0.1 M HNO3 solution for super ferritic stainless steel S44660 was examined in this study. The initial specimens, in their cold-rolled state, showed a high dislocation density, as observed through electron backscatter diffraction (EBSD) experiments. Analysis of potentiodynamic polarization (PDP) curves and electrochemical impedance spectroscopy (EIS) measurements suggested that with the increase of recrystallization degree, the corrosion current density reduced and the corrosion potential increased. As revealed by Mott–Schottky analysis, the passive film showed a dual structure of n-type and p-type semiconductors, with the carrier density of the passive film decreasing as the recrystallization degree increased. X-ray photoelectron spectroscopy (XPS) provided insights into the film composition, indicating that the Fe2O3 and Cr2O3 content, which improved the stability of the passive film, increased with the degree of recrystallization. In summary, the increase in recrystallization degree reduced the number of defects in the microstructure, thereby creating favorable conditions for the formation of highly protective passive films. The passive film formed after complete recrystallization exhibited enhanced corrosion resistance.
本研究考察了再结晶程度对超级铁素体不锈钢 S44660 在 0.1 M HNO3 溶液中形成的被动薄膜性能的影响。通过电子反向散射衍射（EBSD）实验观察到，冷轧状态下的初始试样显示出较高的位错密度。电位极化（PDP）曲线和电化学阻抗谱（EIS）测量分析表明，随着再结晶程度的增加，腐蚀电流密度降低，腐蚀电位升高。莫特-肖特基分析显示，被动膜呈现出 n 型和 p 型半导体的双重结构，被动膜的载流子密度随着再结晶度的增加而降低。X 射线光电子能谱 (XPS) 揭示了薄膜的组成，表明随着再结晶程度的增加，提高无源薄膜稳定性的 Fe2O3 和 Cr2O3 含量也随之增加。总之，再结晶程度的增加减少了微观结构中缺陷的数量，从而为形成高保护性的被动膜创造了有利条件。完全再结晶后形成的被动膜表现出更强的耐腐蚀性。
{"title":"Effect of recrystallization degree on properties of passive film of super ferritic stainless steel S44660","authors":"Bin Wang, Yugui Li, Huaying Li, Guanghui Zhao, Yaohui Song, Hui Xu","doi":"10.1515/corrrev-2023-0069","DOIUrl":"https://doi.org/10.1515/corrrev-2023-0069","url":null,"abstract":"\u0000 The effect of the recrystallization degree on the properties of passive films formed in 0.1 M HNO3 solution for super ferritic stainless steel S44660 was examined in this study. The initial specimens, in their cold-rolled state, showed a high dislocation density, as observed through electron backscatter diffraction (EBSD) experiments. Analysis of potentiodynamic polarization (PDP) curves and electrochemical impedance spectroscopy (EIS) measurements suggested that with the increase of recrystallization degree, the corrosion current density reduced and the corrosion potential increased. As revealed by Mott–Schottky analysis, the passive film showed a dual structure of n-type and p-type semiconductors, with the carrier density of the passive film decreasing as the recrystallization degree increased. X-ray photoelectron spectroscopy (XPS) provided insights into the film composition, indicating that the Fe2O3 and Cr2O3 content, which improved the stability of the passive film, increased with the degree of recrystallization. In summary, the increase in recrystallization degree reduced the number of defects in the microstructure, thereby creating favorable conditions for the formation of highly protective passive films. The passive film formed after complete recrystallization exhibited enhanced corrosion resistance.","PeriodicalId":10721,"journal":{"name":"Corrosion Reviews","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2024-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140652486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-26DOI: 10.1515/corrrev-2023-0120
Qing Hu, Y. Frank Cheng
In this work, the distribution of hydrogen (H) atoms at a notch on an X52 pipeline steel under various applied loads or displacements were investigated by Volta potential measurements using a scanning Kelvin probe (SKP) and finite element modeling. The stress concentration at the notch is elastic under the test condition. The H atom diffusion and distribution is driven by stress, rather than strain, in the steel. However, when displacements are applied on the steel specimen, the strain dominates the H atom distribution. As the local stress or strain increases, the H atom concentration increases, as indicated by negative shifts of the Volta potential. By establishing the quantitative relationships among Volta potential, von Mises stress, and H atom distribution, this work attempts to provide a novel method for H atom detection in steels through the Volta potential measurement.
在这项工作中，通过使用扫描开尔文探针（SKP）进行伏特电势测量和有限元建模，研究了在不同外加载荷或位移条件下 X52 管线钢缺口处氢（H）原子的分布情况。在试验条件下，缺口处的应力集中是弹性的。H 原子的扩散和分布是由钢中的应力而非应变驱动的。然而，当对钢试样施加位移时，应变会主导 H 原子的分布。随着局部应力或应变的增加，H 原子浓度也随之增加，这表现为伏特电势的负移动。通过建立伏特电势、冯-米塞斯应力和 H 原子分布之间的定量关系，本研究试图提供一种通过测量伏特电势检测钢中 H 原子的新方法。
{"title":"Distribution of hydrogen atoms at a notch on X52 steel under various loads and displacements studied by scanning Kelvin probe and finite element modeling","authors":"Qing Hu, Y. Frank Cheng","doi":"10.1515/corrrev-2023-0120","DOIUrl":"https://doi.org/10.1515/corrrev-2023-0120","url":null,"abstract":"\u0000 In this work, the distribution of hydrogen (H) atoms at a notch on an X52 pipeline steel under various applied loads or displacements were investigated by Volta potential measurements using a scanning Kelvin probe (SKP) and finite element modeling. The stress concentration at the notch is elastic under the test condition. The H atom diffusion and distribution is driven by stress, rather than strain, in the steel. However, when displacements are applied on the steel specimen, the strain dominates the H atom distribution. As the local stress or strain increases, the H atom concentration increases, as indicated by negative shifts of the Volta potential. By establishing the quantitative relationships among Volta potential, von Mises stress, and H atom distribution, this work attempts to provide a novel method for H atom detection in steels through the Volta potential measurement.","PeriodicalId":10721,"journal":{"name":"Corrosion Reviews","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2024-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140378923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-18DOI: 10.1515/corrrev-2022-0060
Valentin G. Gavriljuk, V. Shyvaniuk, S. Teus
The evolution of ideas concerning the nature of hydrogen embrittlement of engineering metallic materials is described based on a number of the proposed hypotheses and corresponding experiments. The main attention is paid to two of them, namely hydrogen-enhanced decohesion (HEDE) and hydrogen-enhanced localized plasticity (HELP). Recent attempts to interconnect the both models as HELP + HEDE and HELP-mediated HEDE ones are also estimated. A conclusion is made that HELP model is preferential for understanding the entire array of experimental data with a caveat that it is necessary to consider the chemical nature of hydrogen atoms and view them not only as point defects. Based on the studies of hydrogen effect on the atomic interactions in iron, nickel, titanium, and its alloys, it is shown that the electron approach to HELP phenomenon adequately describes two competitive features of hydrogen behavior in metals: increased brittleness and enhanced plasticity. Due to the increase in the concentration of free electrons, hydrogen decreases the elasticity moduli, which causes the crystal lattice to soften. For this reason, the formation of hydrogen atmospheres around the dislocations decreases the start stress of dislocation sources, as well as line tension of emitted dislocations, enhancing thereby their mobility, and weakens repulsion between dislocations in their pile-ups. The range of temperatures and strain rates in which hydrogen embrittlement occurs is controlled by the enthalpies of hydrogen atoms’ diffusion and their binding to dislocations. The resulting consequences for mechanical properties depend on the short-range atomic order, SRO, which inherently occurs in the metallic solid solutions and localizes plastic deformation both in the cases of short-range atomic ordering and of short-range atomic decomposition. Hydrogen enhances slip localization because of its different solubility in the submicrovolumes of short-range decomposed solid solutions. If SRO is absent or not remarkably formed, the hydrogen-increased concentration of free electrons results in enhanced plasticity. Available positive hydrogen effects on the plasticity of titanium β-alloys and austenitic steels are presented and interpreted.
根据提出的一些假设和相应的实验，阐述了有关工程金属材料氢脆性质的观点演变。主要关注的是其中两个模型，即氢增强脱粘 (HEDE) 和氢增强局部塑性 (HELP)。此外，还对最近尝试将这两种模型互联为 HELP + HEDE 和 HELP 介导的 HEDE 模型进行了估算。得出的结论是，HELP 模型更适于理解所有实验数据，但需要注意的是，有必要考虑氢原子的化学性质，而不仅仅将其视为点缺陷。基于氢对铁、镍、钛及其合金中原子相互作用影响的研究表明，HELP 现象的电子方法充分描述了金属中氢行为的两个竞争特征：脆性增加和塑性增强。由于自由电子浓度的增加，氢会降低弹性模量，从而导致晶格软化。因此，在位错周围形成的氢气环境会降低位错源的起始应力以及发射位错的线拉力，从而增强位错的流动性，并减弱位错堆积时位错之间的排斥力。氢脆发生的温度和应变速率范围受氢原子扩散焓和与位错结合焓的控制。由此对机械性能产生的影响取决于金属固溶体中固有的短程原子有序（SRO），在短程原子有序和短程原子分解的情况下，都会使塑性变形局部化。由于氢在短程分解固溶体亚微观体积中的溶解度不同，因此氢能增强滑移定位。如果 SRO 不存在或没有明显形成，氢增加的自由电子浓度会导致塑性增强。本文介绍并解释了氢对钛β合金和奥氏体钢塑性的积极影响。
{"title":"Hydrogen in metallic alloys ─ embrittlement and enhanced plasticity: a review","authors":"Valentin G. Gavriljuk, V. Shyvaniuk, S. Teus","doi":"10.1515/corrrev-2022-0060","DOIUrl":"https://doi.org/10.1515/corrrev-2022-0060","url":null,"abstract":"\u0000 The evolution of ideas concerning the nature of hydrogen embrittlement of engineering metallic materials is described based on a number of the proposed hypotheses and corresponding experiments. The main attention is paid to two of them, namely hydrogen-enhanced decohesion (HEDE) and hydrogen-enhanced localized plasticity (HELP). Recent attempts to interconnect the both models as HELP + HEDE and HELP-mediated HEDE ones are also estimated. A conclusion is made that HELP model is preferential for understanding the entire array of experimental data with a caveat that it is necessary to consider the chemical nature of hydrogen atoms and view them not only as point defects. Based on the studies of hydrogen effect on the atomic interactions in iron, nickel, titanium, and its alloys, it is shown that the electron approach to HELP phenomenon adequately describes two competitive features of hydrogen behavior in metals: increased brittleness and enhanced plasticity. Due to the increase in the concentration of free electrons, hydrogen decreases the elasticity moduli, which causes the crystal lattice to soften. For this reason, the formation of hydrogen atmospheres around the dislocations decreases the start stress of dislocation sources, as well as line tension of emitted dislocations, enhancing thereby their mobility, and weakens repulsion between dislocations in their pile-ups. The range of temperatures and strain rates in which hydrogen embrittlement occurs is controlled by the enthalpies of hydrogen atoms’ diffusion and their binding to dislocations. The resulting consequences for mechanical properties depend on the short-range atomic order, SRO, which inherently occurs in the metallic solid solutions and localizes plastic deformation both in the cases of short-range atomic ordering and of short-range atomic decomposition. Hydrogen enhances slip localization because of its different solubility in the submicrovolumes of short-range decomposed solid solutions. If SRO is absent or not remarkably formed, the hydrogen-increased concentration of free electrons results in enhanced plasticity. Available positive hydrogen effects on the plasticity of titanium β-alloys and austenitic steels are presented and interpreted.","PeriodicalId":10721,"journal":{"name":"Corrosion Reviews","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2024-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140233230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Repassivation characteristics of carbon steel experienced thermal cycles in tropical marine environments were investigated in a simulated concrete pore solution (SCPS). The results suggested that the damage of passive films on the carbon steel mainly occurred during the cooling process in thermal cycles. The damaged passive films gradually recovered in the SCPS, and the duration of repassivation extended with the amplitude of thermal cycles and cyclic number in the high-amplitude thermal cycles (20–60 °C and 20–70 °C), while it was not significantly affected by the cyclic number in the low-amplitude thermal cycles (20–40 °C and 20–50 °C).
{"title":"Repassivation characteristics of carbon steel in chloride-free pore solution after thermal cycles of simulated tropical marine environments","authors":"Tong Wu, Xingguo Feng, Xiangyu Lu, Zhuang Ning, Shuai Qu","doi":"10.1515/corrrev-2022-0123","DOIUrl":"https://doi.org/10.1515/corrrev-2022-0123","url":null,"abstract":"\u0000 Repassivation characteristics of carbon steel experienced thermal cycles in tropical marine environments were investigated in a simulated concrete pore solution (SCPS). The results suggested that the damage of passive films on the carbon steel mainly occurred during the cooling process in thermal cycles. The damaged passive films gradually recovered in the SCPS, and the duration of repassivation extended with the amplitude of thermal cycles and cyclic number in the high-amplitude thermal cycles (20–60 °C and 20–70 °C), while it was not significantly affected by the cyclic number in the low-amplitude thermal cycles (20–40 °C and 20–50 °C).","PeriodicalId":10721,"journal":{"name":"Corrosion Reviews","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2024-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140234162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The present study presented the systematic investigations on the influence of Co and Cu on the corrosion behaviors and wear resistance of Ti–Nb based shape memory alloys. The results demonstrated that the addition of Co and Cu can effectively enhance the corrosion resistance of Ti–Nb based shape memory alloys. By optimizing the chemical composition, the superior corrosion resistance with (φ corr = –0.95499 V, J corr = 357.92 μA cm−2) and (φ corr = –0.96775 V, J corr = 467.54 μA cm−2) can be obtained in Ti–Nb–Co1.0 and Ti–Nb–Cu1.5 shape memory alloys, respectively. Similarly, the wear properties of Ti–Nb based shape memory alloys were also dependent on the ternary alloying elements. The friction coefficient of Ti–Nb based shape memory alloy firstly decreased and then increased with the content of ternary alloying element increasing. And then decreased again, as the exceeding ternary alloying element was added. In addition, the wear behaviors of Ti–Nb based shape memory alloys can be attributed to the combination of abrasive wear, adhesive wear, and oxidative wear, irrespective of the types of ternary alloying elements. In contrast, Ti–Nb–Cu5.0 shape memory alloy has the lowest friction coefficient of 0.45, which is smaller than that (0.50) of Ti–Nb–Co5.0 shape memory alloy.
{"title":"A comparative study on corrosion and wear performances of Ti–Nb–(Cu, Co) biomedical shape memory alloys","authors":"Yunfei Wang, Wei Liu, Xinnuo Liu, Hai-zhen Wang, B. Sun, Xinjian Cao, Xiao Liu, Yuehai Song, Xiaoyang Yi, Xianglong Meng, Zhiyong Gao","doi":"10.1515/corrrev-2023-0063","DOIUrl":"https://doi.org/10.1515/corrrev-2023-0063","url":null,"abstract":"\u0000 The present study presented the systematic investigations on the influence of Co and Cu on the corrosion behaviors and wear resistance of Ti–Nb based shape memory alloys. The results demonstrated that the addition of Co and Cu can effectively enhance the corrosion resistance of Ti–Nb based shape memory alloys. By optimizing the chemical composition, the superior corrosion resistance with (φ\u0000 corr = –0.95499 V, J\u0000 corr = 357.92 μA cm−2) and (φ\u0000 corr = –0.96775 V, J\u0000 corr = 467.54 μA cm−2) can be obtained in Ti–Nb–Co1.0 and Ti–Nb–Cu1.5 shape memory alloys, respectively. Similarly, the wear properties of Ti–Nb based shape memory alloys were also dependent on the ternary alloying elements. The friction coefficient of Ti–Nb based shape memory alloy firstly decreased and then increased with the content of ternary alloying element increasing. And then decreased again, as the exceeding ternary alloying element was added. In addition, the wear behaviors of Ti–Nb based shape memory alloys can be attributed to the combination of abrasive wear, adhesive wear, and oxidative wear, irrespective of the types of ternary alloying elements. In contrast, Ti–Nb–Cu5.0 shape memory alloy has the lowest friction coefficient of 0.45, which is smaller than that (0.50) of Ti–Nb–Co5.0 shape memory alloy.","PeriodicalId":10721,"journal":{"name":"Corrosion Reviews","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2024-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140241133","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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