Anti-corrosion Methods and Materials最新文献_第4页

Effect of annealing treatment of hot-rolled AZ31 magnesium alloy on properties and stress corrosion resistance of MAO coatings 热轧 AZ31 镁合金退火处理对 MAO 涂层性能和抗应力腐蚀性能的影响

IF 1.2 4区材料科学 Q3 Chemical Engineering

Anti-corrosion Methods and Materials

Pub Date : 2024-05-13 DOI: 10.1108/acmm-01-2024-2954

Feng Zhou, S. S. Lu, B. Jiang, R.G. Song

Purpose

This study aims to study the formation mechanism of micro-arc oxidation (MAO) coating on AZ31 magnesium alloy and how the annealing process affects its corrosion resistance.

Design/methodology/approach

This study involved immersion experiments, electrochemical experiments and slow strain rate tensile experiments, along with scanning electron microscopy, optical microscopy observation and X-ray diffraction analysis.

Findings

The findings suggest that annealing treatment can refine the grain size of AZ31 magnesium alloy to an average of 6.9 µm at 300°C. The change in grain size leads to a change in conductivity, which affects the performance of MAO coatings. The MAO coating obtained by annealing the substrate at 300°C has smaller pores and porosity, resulting in better adhesion and wear resistance.

Originality/value

The coating acts as a barrier to prevent corrosive substances from entering the substrate. However, the smaller pores and porosity reduce the channels for the corrosive solution to pass through the coating. When the coating cracks or falls off, the corrosive medium and substrate come into direct contact. Smaller and uniform grains have better corrosion resistance.

本研究旨在研究 AZ31 镁合金微弧氧化（MAO）涂层的形成机理，以及退火处理如何影响其耐腐蚀性。本研究涉及浸泡实验、电化学实验和慢应变速率拉伸实验，以及扫描电子显微镜、光学显微镜观察和 X 射线衍射分析。研究结果研究结果表明，退火处理可使 AZ31 镁合金的晶粒尺寸在 300°C 时细化至平均 6.9 µm。晶粒尺寸的变化会导致电导率的变化，从而影响 MAO 涂层的性能。通过在 300°C 下对基材进行退火处理而获得的 MAO 涂层具有更小的孔隙和气孔率，因而具有更好的附着力和耐磨性。然而，较小的孔隙和多孔性减少了腐蚀性溶液通过涂层的通道。当涂层开裂或脱落时，腐蚀介质和基体就会直接接触。小而均匀的颗粒具有更好的耐腐蚀性。

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引用次数: 0

Optimizing corrosion resistance of Fe35Ni20Cr12Mn28Al5 high-entropy alloy: synergistic effect of Mo inhibitor, Al content and cold rolling 优化 Fe35Ni20Cr12Mn28Al5 高熵合金的耐腐蚀性：Mo 抑制剂、Al 含量和冷轧的协同效应

IF 1.2 4区材料科学 Q3 Chemical Engineering

Anti-corrosion Methods and Materials

Pub Date : 2024-05-07 DOI: 10.1108/acmm-12-2023-2937

Sally Elkatatny, Lamiaa Zaky, Walaa Abdelaziem, Aliaa Abdelfatah

Purpose

This study aims to investigate the corrosion behavior of cold-rolled Fe₃₅Ni₂₀C_r12Mn_(28-x)Al_x high-entropy alloys (HEAs) using the potentiodynamic polarization technique in 1 M H₂SO₄ acid. Additionally, the influence of molybdenum (Mo) additions as inhibitors and the effect of variations in cold rolling reduction ratios and Al content on corrosion behavior are examined.

Design/methodology/approach

Two cold rolling reduction ratios, namely, 50% (R50) and 90% (R90), were examined for the cold-rolled Fe₃₅Ni₂₀Cr₁₂Mn₂₈Al₅ (Al₅) and Fe₃₅Ni₂₀Cr₁₂Mn₂₃Al₁₀ (Al₁₀) HEAs. Mo inhibitor additions were introduced at varying concentrations of 0.3, 0.6 and 0.9 Wt.%. The potentiodynamic polarization technique was used to evaluate the corrosion rates (CRs) under different experimental conditions.

Findings

The results indicate that the addition of 0.3 Wt.% Mo in 1 M H₂SO₄ yielded the lowest CR for both R50 and R90, irrespective of the Al content in the HEAs. However, the highest CR was observed at 0.6 Wt.% Mo addition. Furthermore, increasing the concentration of Al resulted in a corresponding rise in the CR. Comparatively, the CR decreased significantly when the cold rolling reduction ratio increased from R50 to R90.

Originality/value

This research provides valuable insights into the intricate relationship between Mo inhibitors, cold rolling reduction ratio, Al content and the resulting corrosion behavior of Fe₃₅Ni₂₀Cr₁₂Mn_(28-x)Al_x HEAs. The comprehensive analysis of corroded HEAs, including surface morphology, compositions and elemental distribution mapping, contributes to the understanding of the corrosion mechanisms and offers potential strategies for enhancing the corrosion behavior of HEAs.

目的本研究旨在使用电位极化技术研究冷轧铁 35Ni20Cr12Mn(28-x)Alx 高熵合金 (HEA) 在 1 M H2SO4 酸中的腐蚀行为。此外，还研究了添加钼（Mo）作为抑制剂的影响，以及冷轧还原比和铝含量的变化对腐蚀行为的影响。设计/方法/途径研究了冷轧 Fe35Ni20Cr12Mn28Al5 (Al5) 和 Fe35Ni20Cr12Mn23Al10 (Al10) HEA 的两种冷轧还原比，即 50% (R50) 和 90% (R90)。钼抑制剂的添加浓度分别为 0.3、0.6 和 0.9 Wt.%。结果表明，无论 HEA 中的铝含量如何，在 1 M H2SO4 中添加 0.3 Wt.% 的 Mo 对 R50 和 R90 的腐蚀速率（CR）都是最低的。然而，在添加 0.6 重量%的钼时，观察到的 CR 最高。此外，增加铝的浓度也会相应提高 CR。相比之下，当冷轧还原比从 R50 增加到 R90 时，CR 明显降低。这项研究为了解 Mo 抑制剂、冷轧还原比、铝含量和 Fe35Ni20Cr12Mn(28-x)Alx HEAs 腐蚀行为之间的复杂关系提供了宝贵的见解。对腐蚀的 HEA 进行的全面分析，包括表面形貌、成分和元素分布图的绘制，有助于对腐蚀机理的理解，并为增强 HEA 的腐蚀行为提供了潜在的策略。

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引用次数: 0

The effect of NaCl concentration on impact-sliding fretting corrosion behavior of Inconel 690TT heat transfer tubes NaCl 浓度对 Inconel 690TT 传热管冲击-滑动摩擦腐蚀行为的影响

IF 1.2 4区材料科学 Q3 Chemical Engineering

Anti-corrosion Methods and Materials

Pub Date : 2024-05-07 DOI: 10.1108/acmm-02-2024-2965

Yinghong Li, Wei Tan, Wenjie Pei, Guorui Zhu

Purpose

The purpose of this paper is to investigate the effect of NaCl solution with different concentrations on impact-sliding fretting corrosion behavior of Inconel 690TT steam generator heat transfer tubes.

Design/methodology/approach

The optical 3D profiler was used to measure the wear profile and calculated the wear volume. Corrosion behavior was studied using open circuit potential monitoring and potentiodynamic polarization testing. The morphologies and elemental distributions of wear scars were analyzed using scanning electron microscopy and energy-dispersive spectroscopy. The synergism of wear and corrosion was analyzed according to the ASTM G119 standard.

Findings

The corrosion tendency reflected by OCP and the corrosion current calculated by Tafel both increased with the increase of NaCl concentration. The total volume loss of the material increased with concentration, and it was known from the synergism that the volume loss caused by corrosion-enhanced wear accounted for the largest proportion, while the wear-enhanced corrosion also made a greater contribution to volume loss than tangential fretting corrosion. Through the analysis of the material morphologies and synergism of wear and corrosion, the damage mechanism was elucidated.

Originality/value

The research findings can provide reference for impact-sliding fretting corrosion behavior of Inconel 690TT heat transfer tubes in NaCl solution with different concentrations.

本文旨在研究不同浓度的 NaCl 溶液对 Inconel 690TT 蒸汽发生器换热管冲击-滑动摩擦腐蚀行为的影响。使用开路电位监测和电位极化测试研究了腐蚀行为。使用扫描电子显微镜和能量色散光谱分析了磨损疤痕的形态和元素分布。根据 ASTM G119 标准分析了磨损和腐蚀的协同作用。研究结果 OCP 反映的腐蚀趋势和 Tafel 计算的腐蚀电流都随着 NaCl 浓度的增加而增加。材料的总体积损失随浓度的增加而增加，根据协同作用可知，腐蚀增强磨损造成的体积损失所占比例最大，而磨损增强腐蚀对体积损失的贡献也大于切向摩擦腐蚀。通过对材料形貌和磨损与腐蚀协同作用的分析，阐明了其损伤机理。研究结果可为 Inconel 690TT 传热管在不同浓度的 NaCl 溶液中的冲击滑动烧蚀行为提供参考。

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引用次数: 0

Recent progress of self-healing polyaniline organic composite coatings: active agents, methods and protection mechanism 自修复聚苯胺有机复合涂层的最新进展：活性剂、方法和保护机制

IF 1.2 4区材料科学 Q3 Chemical Engineering

Anti-corrosion Methods and Materials

Pub Date : 2024-05-06 DOI: 10.1108/acmm-10-2023-2907

Suyun Liu, Hu Liu, Ningning Shao, Zhijun Dong, Rui Liu, Li Liu, Fuhui Wang

Purpose

Polyaniline (PANI) has garnered attention for its potential applications in anticorrosion fields because of its unique properties. Satisfactory outcomes have been achieved when using PANI as a functional filler in organic coatings. More recently, research has extensively explored PANI-based organic coatings with self-healing properties. The purpose of this paper is to provide a summary of the active agents, methods and mechanisms involved in the self-healing of organic coatings.

Design/methodology/approach

This study uses specific doped acids and metal corrosion inhibitors as active and self-healing agents to modify PANI using the methods of oxidation polymerization, template synthesis, nanosheet carrier and nanocontainer loading methods. The anticorrosion performance of the coatings is evaluated using EIS, LEIS and salt spray tests.

Findings

Specific doped acids and metal corrosion inhibitors are used as active agents to modify PANI and confer self-healing properties to the coatings. The coatings’ active protection mechanism encompasses PANI’s own passivation ability, the adsorption of active agents and the creation of insoluble compounds or complexes.

Originality/value

This paper summarizes the active agents used to modify PANI, the procedures used for modification and the self-healing mechanism of the composite coatings. It also proposes future directions for developing PANI organic coatings with self-healing capabilities. The summaries and proposals presented may facilitate large-scale production of the PANI organic coatings, which exhibit outstanding anticorrosion competence and self-healing properties.

目的聚苯胺（PANI）因其独特的性能在防腐领域的潜在应用而备受关注。将 PANI 用作有机涂料中的功能填料已经取得了令人满意的结果。最近，研究人员广泛探索了具有自修复特性的 PANI 有机涂层。本研究采用氧化聚合、模板合成、纳米片载体和纳米容器负载等方法，将特定的掺杂酸和金属腐蚀抑制剂作为活性剂和自修复剂，对 PANI 进行改性。研究结果特定的掺杂酸和金属腐蚀抑制剂被用作活性剂来改性 PANI，并赋予涂层自修复特性。涂层的活性保护机制包括 PANI 自身的钝化能力、活性剂的吸附以及不溶性化合物或复合物的生成。本文还提出了开发具有自修复功能的 PANI 有机涂层的未来方向。这些总结和建议可促进 PANI 有机涂层的大规模生产，因为这种涂层具有出色的防腐能力和自修复性能。

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引用次数: 0

A high-resolution characterization of surface film formed on alloys 800 and 690 exposed to chloride and thiosulfate-containing solution at 300°C 在 300°C 下暴露于含氯化物和硫代硫酸盐溶液的合金 800 和 690 上形成的表面膜的高分辨率特征描述

IF 1.2 4区材料科学 Q3 Chemical Engineering

Anti-corrosion Methods and Materials

Pub Date : 2024-05-06 DOI: 10.1108/acmm-02-2024-2969

Shan Gao, Bin Wang, Xinjie Yao, Quan Yuan

Purpose

This paper aims to characterize the surface film formed on Alloys 800 and 690 in chloride and thiosulfate-containing solution at 300°C.

Design/methodology/approach

Alloy 800 and 690 were immersed in chloride and thiosulfate-containing solution at 300°C up to five days, and then the surface film was analyzed by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and energy dispersive X-ray spectrometers (EDX).

Findings

Through static immersion experiments in a high-temperature and high-pressure water environment, the alloy samples covered by surface film after five days of immersion were obtained. The morphology of the surface film was characterized at both horizontal and cross-sectional scales using SEM and focused ion beam-TEM techniques. It was observed that due to the influence of the quartz lining, the surface film primarily exhibited a bilayered structure. The first layer contained a significant amount of SiO₂, with a higher content of metal hydroxides compared to metal oxides. The second layer was predominantly composed of Fe, Ni and Cr, with a higher content of metal oxides compared to metal hydroxides.

Originality/value

The results showed that the materials of the lining of the autoclave could significantly influence the film composition of the tested material, which should be paid attention when analyzing the corrosion mechanism at high temperature.

设计/方法/途径将合金 800 和 690 浸入 300°C 的含氯化物和硫代硫酸盐的溶液中长达五天，然后用扫描电子显微镜 (SEM)、X 射线光电子能谱 (XPS)、透射电子显微镜 (TEM) 和能量色散 X 射线光谱仪 (EDX) 分析表面膜。研究结果通过在高温高压水环境中进行静态浸泡实验，获得了浸泡五天后表面被薄膜覆盖的合金样品。利用扫描电镜和聚焦离子束-TEM 技术对表面膜的横截面和纵截面形态进行了表征。结果表明，由于石英衬里的影响，表面薄膜主要呈现双层结构。第一层含有大量的二氧化硅，与金属氧化物相比，金属氢氧化物的含量更高。第二层主要由 Fe、Ni 和 Cr 组成，与金属氢氧化物相比，金属氧化物的含量更高。

{"title":"A high-resolution characterization of surface film formed on alloys 800 and 690 exposed to chloride and thiosulfate-containing solution at 300°C","authors":"Shan Gao, Bin Wang, Xinjie Yao, Quan Yuan","doi":"10.1108/acmm-02-2024-2969","DOIUrl":"https://doi.org/10.1108/acmm-02-2024-2969","url":null,"abstract":"<h3>Purpose</h3>\u0000<p>This paper aims to characterize the surface film formed on Alloys 800 and 690 in chloride and thiosulfate-containing solution at 300°C.</p>\u0000<h3>Design/methodology/approach</h3>\u0000<p>Alloy 800 and 690 were immersed in chloride and thiosulfate-containing solution at 300°C up to five days, and then the surface film was analyzed by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and energy dispersive X-ray spectrometers (EDX).</p>\u0000<h3>Findings</h3>\u0000<p>Through static immersion experiments in a high-temperature and high-pressure water environment, the alloy samples covered by surface film after five days of immersion were obtained. The morphology of the surface film was characterized at both horizontal and cross-sectional scales using SEM and focused ion beam-TEM techniques. It was observed that due to the influence of the quartz lining, the surface film primarily exhibited a bilayered structure. The first layer contained a significant amount of SiO<sub>2</sub>, with a higher content of metal hydroxides compared to metal oxides. The second layer was predominantly composed of Fe, Ni and Cr, with a higher content of metal oxides compared to metal hydroxides.</p>\u0000<h3>Originality/value</h3>\u0000<p>The results showed that the materials of the lining of the autoclave could significantly influence the film composition of the tested material, which should be paid attention when analyzing the corrosion mechanism at high temperature.</p>","PeriodicalId":8217,"journal":{"name":"Anti-corrosion Methods and Materials","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140836249","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}

引用次数: 0

Effects of nano-SiO2 particle addition on the structure and properties of micro-arc oxidation ceramic coatings on 7075 aluminum alloy 添加纳米二氧化硅粒子对 7075 铝合金微弧氧化陶瓷涂层结构和性能的影响

IF 1.2 4区材料科学 Q3 Chemical Engineering

Anti-corrosion Methods and Materials

Pub Date : 2024-05-02 DOI: 10.1108/acmm-01-2024-2956

Song Tang, Xiaowen Chen, Defen Zhang, Wanlin Xie, Qingzheng Ran, Bin Luo, Han Luo, Junwei Yang

Purpose

The purpose of this study is to investigate the influence of varying concentrations of nano-SiO₂ particle doping on the structure and properties of the micro-arc oxidation (MAO) coating of 7075 aluminum alloy. This research aims to provide novel insights and methodologies for the surface treatment and protection of 7075 aluminum alloy.

Design/methodology/approach

The surface morphology of the MAO coating was characterized using scanning electron microscope. Energy spectrometer was used to characterize the elemental content and distribution on the surface and cross section of the MAO coating. The phase composition of the MAO coating was characterized using X-ray diffractometer. The corrosion resistance of the MAO coating was characterized using an electrochemical workstation.

Findings

The results showed that when the addition of nano-SiO₂ particles is 3 g/L, the corrosion resistance is optimal.

Originality/value

This study investigated the influence of different concentrations of nano-SiO₂ particles on the structure and properties of the MAO coating of 7075 aluminum alloy.

目的本研究旨在探讨不同浓度的纳米二氧化硅粒子掺杂对 7075 铝合金微弧氧化（MAO）涂层的结构和性能的影响。该研究旨在为 7075 铝合金的表面处理和保护提供新的见解和方法。设计/方法/途径使用扫描电子显微镜对 MAO 涂层的表面形态进行表征。能谱仪用于表征 MAO 涂层表面和横截面上的元素含量和分布。使用 X 射线衍射仪对 MAO 涂层的相组成进行了表征。研究结果表明，当纳米二氧化硅颗粒的添加量为 3 g/L 时，耐腐蚀性能最佳。

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引用次数: 0

Characterization of hydrogen embrittlement sensitivity of 18CrNiMo7-6 alloy steel surface-modified layer based on scratch method 基于划痕法的 18CrNiMo7-6 合金钢表面改性层氢脆敏感性表征

IF 1.2 4区材料科学 Q3 Chemical Engineering

Anti-corrosion Methods and Materials

Pub Date : 2024-05-02 DOI: 10.1108/acmm-02-2024-2967

Gang Wang, Mian Wang, ZiHan Wang, GuangTao Xu, MingHao Zhao, Lingxiao Li

Purpose

The purpose of this paper is to assess the hydrogen embrittlement sensitivity of carbon gradient heterostructure materials and to verify the reliability of the scratch method.

Design/methodology/approach

The surface-modified layer of 18CrNiMo7-6 alloy steel was delaminated to study its hydrogen embrittlement characteristics via hydrogen permeation, electrochemical hydrogen charging and scratch experiments.

Findings

The results showed that the diffusion coefficients of hydrogen in the surface and matrix layers are 3.28 × 10⁻⁷ and 16.67 × 10⁻⁷ cm²/s, respectively. The diffusible-hydrogen concentration of the material increases with increasing hydrogen-charging current density. For a given hydrogen-charging current density, the diffusible-hydrogen concentration gradually decreases with increasing depth in the surface-modified layer. Fracture toughness decreases with increasing diffusible-hydrogen concentration, so the susceptibility to hydrogen embrittlement decreases with increasing depth in the surface-modified layer.

Originality/value

The reliability of the scratch method in evaluating the fracture toughness of the surface-modified layer material is verified. An empirical formula is given for fracture toughness as a function of diffused-hydrogen concentration.

本文旨在评估碳梯度异质结构材料的氢脆敏感性，并验证划痕法的可靠性。设计/方法/途径对 18CrNiMo7-6 合金钢的表面改性层进行分层，通过氢渗透、电化学充氢和划痕实验研究其氢脆特性。材料的可扩散氢浓度随着充氢电流密度的增加而增加。在给定的充氢电流密度下，扩散氢浓度随着表面改性层深度的增加而逐渐降低。断裂韧性随可扩散氢浓度的增加而降低，因此氢脆敏感性随表面改性层深度的增加而降低。给出了断裂韧性与扩散氢浓度函数的经验公式。

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引用次数: 0

Preparation, anticorrosion and antifouling behavior of halloysite-loaded nanocomposite with CAP and BTA 含 CAP 和 BTA 的埃洛石负载纳米复合材料的制备、防腐和防污行为

IF 1.2 4区材料科学 Q3 Chemical Engineering

Anti-corrosion Methods and Materials

Pub Date : 2024-04-29 DOI: 10.1108/acmm-01-2024-2953

Yaqi Diao, Jihui Wang, Renhong Song, Xue Fei, Zhichang Xue, Wenbin Hu

Purpose

The purpose of this paper is to prepare a multifunctional nanocomposite that is slow-release and resistant to seawater corrosion and biofouling corrosion and to explore the synergistic effect between the two corrosion inhibitors.

Design/methodology/approach

The morphology, structure and release properties of CAP@HNTs, BTA@HNTs and CAP/BTA@HNTs were investigated by scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, specific surface area analysis and UV spectrophotometry. The corrosion resistance and antimicrobial properties were investigated by electrochemical measurements and bioinhibition rate tests, and the synergistic effect between the two corrosion inhibitors was explored by X-ray photoelectron spectroscopy.

Findings

The CAP/BTA@HNTs are responsive to acidic environments and have significantly improved antibacterial and corrosion resistance compared with CAP@HNTs and BTA@HNTs. CAP and BTA have a positive synergistic effect on anticorrosion and antifouling.

Originality/value

Two types of inhibitors, anticorrosion and antifouling, were loaded into the same nanocontainer to prepare a slow-releasable and multifunctional nanocomposite with higher resistance to seawater corrosion and biocorrosion and to explore the synergistic effect of CAP and BTA on corrosion resistance.

设计/方法/途径通过扫描电镜、透射电镜、傅立叶变换红外光谱、比表面积分析和紫外分光光度法研究了CAP@HNTs、BTA@HNTs和CAP/BTA@HNTs的形态、结构和释放性能。研究结果与 CAP@HNTs 和 BTA@HNTs 相比，CAP/BTA@HNTs 对酸性环境反应灵敏，抗菌性和耐腐蚀性显著提高。原创性/价值将防腐和防污两种抑制剂装入同一个纳米容器中，制备出一种可缓慢释放的多功能纳米复合材料，具有更高的耐海水腐蚀和耐生物腐蚀性能，并探索了 CAP 和 BTA 对耐腐蚀性能的协同作用。

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引用次数: 0

The influence of rolling on the corrosion and wear resistance of the MAO coating on ZM5 alloy 轧制对 ZM5 合金 MAO 涂层耐腐蚀性和耐磨性的影响

IF 1.2 4区材料科学 Q3 Chemical Engineering

Anti-corrosion Methods and Materials

Pub Date : 2024-04-26 DOI: 10.1108/acmm-12-2023-2933

Bo Zhang, Yuqian Zheng, Zhiyuan Cui, Dongdong Song, Faqian Liu, Weihua Li

PurposeThe impact of rolling on the performance of micro arc oxidation (MAO) coatings on ZM5 alloy has been underreported. The purpose of this study is to explore the correlation between rolling and the failure mechanism of MAO coatings in greater depth.Design/methodology/approachThe influence of rolling on the corrosion and wear properties of MAO coating was investigated by phase structure, bond strength test (initial bond strength and wet adhesion), electrochemical impedance spectroscopy and wear test. The change of the surface electrochemical properties was studied by first principles analysis.FindingsThe results showed that the MAO coating on rolled alloy had better corrosion and wear resistance compared to cast alloy, although the structure and component content of two kinds of MAO coating are nearly identical. The difference in interface bonding between MAO coating and Mg substrate is the primary factor contributing to the disparity in performance between the two types of samples. Finally, the impact of the rolling process on MAO coating properties is explained through first-principle calculation.Originality/valueA comprehensive explanation of the impact of the rolling process on MAO coating properties will provide substantial support for enhancing the application of Mg alloy anticorrosion.Graphical abstract

目的轧制对 ZM5 合金微弧氧化（MAO）涂层性能的影响尚未得到充分报道。本研究旨在更深入地探讨轧制与 MAO 涂层失效机理之间的相关性。通过相结构、结合强度测试（初始结合强度和湿附着力）、电化学阻抗光谱和磨损测试研究了轧制对 MAO 涂层腐蚀和磨损性能的影响。结果表明，尽管两种 MAO 涂层的结构和成分含量几乎相同，但与铸造合金相比，轧制合金上的 MAO 涂层具有更好的耐腐蚀性和耐磨性。MAO 涂层与镁基体之间界面结合力的差异是导致两种样品性能差异的主要因素。最后，通过第一性原理计算解释了轧制过程对 MAO 涂层性能的影响。原创性/价值全面解释轧制过程对 MAO 涂层性能的影响将为提高镁合金防腐的应用提供实质性支持。

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引用次数: 0

The inhibitor effect of migrating corrosion inhibitors on Q235 steel in high alkaline environment under cathodic polarization 阴极极化下高碱性环境中迁移腐蚀抑制剂对 Q235 钢的抑制效果

IF 1.2 4区材料科学 Q3 Chemical Engineering

Anti-corrosion Methods and Materials

Pub Date : 2024-04-25 DOI: 10.1108/acmm-02-2024-2972

Hang Jia, Zhiming Gao, Shixiong Wu, Jia Liang Liu, Wenbin Hu

PurposeThis study aims to investigate the corrosion inhibitor effect of migrating corrosion inhibitor (MCI) on Q235 steel in high alkaline environment under cathodic polarization.Design/methodology/approachThis study investigated the electrochemical characteristics of Q235 steel with and without MCI by polarization curve and electrochemical impedance spectroscopy. Besides, the surface composition of Q235 steel under different environments was analyzed by X-ray photoelectron spectroscopy. In addition, the migration characteristic of MCI and the adsorption behavior of MCI under cathodic polarization were studied using Raman spectroscopy.FindingsDiethanolamine (DEA) and N, N-dimethylethanolamine (DMEA) can inhibit the increase of Fe(II) in the oxide film of Q235 steel under cathodic polarization. The adsorption stability of DMEA film was higher under cathodic polarization potential, showing a higher corrosion inhibition ability. The corrosion inhibition mechanism of DEA and DMEA under cathodic polarization potential was proposed.Originality/valueThe MCI has a broad application prospect in the repair of damaged reinforced concrete due to its unique migratory characteristics. The interaction between MCIs, rebar and concrete with different compositions has been studied, but the passivation behavior of the steel interface in the presence of both the migrating electric field and corrosion inhibitors has been neglected. And it was investigated in this paper.

目的本研究旨在探讨迁移缓蚀剂（MCI）在阴极极化条件下对高碱性环境中的 Q235 钢的缓蚀效果。此外，还利用 X 射线光电子能谱分析了 Q235 钢在不同环境下的表面成分。研究结果二乙醇胺（DEA）和 N，N-二甲基乙醇胺（DMEA）在阴极极化条件下能抑制 Q235 钢氧化膜中铁（II）的增加。在阴极极化电位下，DMEA 膜的吸附稳定性更高，显示出更强的缓蚀能力。提出了 DEA 和 DMEA 在阴极极化电位下的缓蚀机理。不同成分的 MCIs、钢筋和混凝土之间的相互作用已被研究，但钢筋界面在迁移电场和缓蚀剂作用下的钝化行为却被忽视。本文对此进行了研究。

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引用次数: 0