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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 Q2 METALLURGY & METALLURGICAL ENGINEERING 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 Q2 METALLURGY & METALLURGICAL ENGINEERING 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 Q2 METALLURGY & METALLURGICAL ENGINEERING 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
Improvement of corrosion resistance of 7075 aluminum alloy by ceria coating modified by zinc oxide nanoparticles 用纳米氧化锌修饰的铈涂层提高 7075 铝合金的耐腐蚀性能
IF 1.2 4区 材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING Pub Date : 2024-04-24 DOI: 10.1108/acmm-05-2023-2803
Vahid Ahmadi, Seyed Mohammad Ali Hosseini, Effat Jamalizadeh, Razie Naghizade

Purpose

This paper aims to investigate the corrosion resistance of two types of coatings – one is ceria sol coating and the other is ceria sol coating modified by ZnO nanoparticles on 7075 aluminum alloy in 3.5% NaCl solution.

Design/methodology/approach

Aluminum alloys were dipped into ceria sol and ceria sol modified by ZnO nanoparticles separately and removed after 10 min from the solutions and dried at 110°C for 30 min and heated at 500 °C for 30 min to form the coatings. The coatings have been characterized by using field emission scanning electron microscopy (FE-SEM), electrochemical impedance spectroscopy (EIS), X-ray diffraction (XRD) and energy dispersive spectroscopy (EDS). The EIS tests were performed in a corrosive solution of 3.5% NaCl.

Findings

The results showed that the coating of ceria sol modified by ZnO nanoparticles has higher corrosion resistance than the ceria sol coating and the bare sample. Also, the best efficiency is related to aluminum sample immersion after 1 h in NaCl corrosive solution for coating modified by ZnO nanoparticles.

Originality/value

In this research, the modification of ceria sol coating by ZnO nanoparticles had an effect on improving the corrosion behavior of aluminum alloy. It is also understood that modification of coatings is an effective parameter on corrosion resistance.

本文旨在研究两种涂层--一种是铈溶胶涂层,另一种是氧化锌纳米粒子修饰的铈溶胶涂层--在 3.5% NaCl 溶液中对 7075 铝合金的耐腐蚀性能。将铝合金分别浸入铈溶胶和氧化锌纳米粒子修饰的铈溶胶中,10 分钟后从溶液中取出,在 110°C 下干燥 30 分钟,然后在 500°C 下加热 30 分钟,形成涂层。利用场发射扫描电子显微镜(FE-SEM)、电化学阻抗光谱(EIS)、X 射线衍射(XRD)和能量色散光谱(EDS)对涂层进行了表征。结果表明,氧化锌纳米粒子修饰的铈溶胶涂层比铈溶胶涂层和裸样品具有更高的耐腐蚀性。此外,氧化锌纳米粒子修饰的涂层在 NaCl 腐蚀溶液中浸泡 1 小时后,铝样品的耐腐蚀性能最佳。这也说明涂层改性是影响耐腐蚀性的一个有效参数。
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引用次数: 0
Effect of brazing and artificial aging on the corrosion and strengthening behavior of a quad-layer Al alloy composite 钎焊和人工老化对四层铝合金复合材料腐蚀和强化行为的影响
IF 1.2 4区 材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING Pub Date : 2024-04-24 DOI: 10.1108/acmm-02-2024-2968
Dejing Zhou, Yanming Xia, Zhiming Gao, Wenbin Hu

Purpose

This study aims to investigate the influence mechanism of brazing and aging on the strengthening and corrosion behavior of novel multilayer sheets (AA4045/AA7072/AA3003M/AA4045).

Design/methodology/approach

Polarization curve tests, immersion experiments and transmission electron microscopy analysis were used to study the corrosion behavior and tensile properties of the sheets before and after brazing and aging.

Findings

The strength of the sheet is weakened after brazing due to brittle eutectic phases, and recovered after aging due to enhanced precipitation strengthening in the AA7072 interlayer. The core of nonbrazed sheets cannot be protected due to the significant galvanic coupling effect between the intermetallic particles and the substrate. Brazing and aging treatments promote the redissolved of second phased and limit corrosion along the eutectic region in the clad, allowing the core to be protected.

Originality/value

AA7xxx alloy was added to conventional brazed sheets to form a novel Al alloy composite sheet with AA4xxx/AA7xxx/AA3xxx structure. The strengthening and corrosion mechanism of the sheet was proposed. The added interlayer can sacrificially protect the core from corrosion and improves strength after aging treatment.

目的 本研究旨在探讨钎焊和老化对新型多层板(AA4045/AA7072/AA3003M/AA4045)的强化和腐蚀行为的影响机理。设计/方法/途径 采用极化曲线测试、浸泡实验和透射电子显微镜分析等方法研究钎焊和老化前后板材的腐蚀行为和拉伸性能。结果钎焊后板材的强度因脆性共晶相而减弱,而老化后又因 AA7072 夹层的沉淀强化而恢复。由于金属间化合物颗粒与基体之间存在明显的电偶效应,因此非钎焊板材的核心无法得到保护。钎焊和时效处理促进了第二相的再溶解,并限制了堆焊层中共晶区的腐蚀,从而使芯部得到保护。提出了该板材的强化和腐蚀机理。添加的中间层可以牺牲芯材免受腐蚀,并提高老化处理后的强度。
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引用次数: 0
Investigations on corrosion behavior of 316LN and 316L austenitic stainless steel under corrosion-deformation interactions 腐蚀-变形相互作用下 316LN 和 316L 奥氏体不锈钢的腐蚀行为研究
IF 1.2 4区 材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING Pub Date : 2024-04-22 DOI: 10.1108/acmm-11-2023-2920
Sixian Rao, Changwei Zhang, Fei Zhao, Lei Bao, Xiaoyi Wang

Purpose

This paper aims to explore the influence of corrosion-deformation interactions (CDI) on the corrosion behavior and mechanisms of 316LN under applied tensile stresses.

Design/methodology/approach

Corrosion of metals would be aggravated by CDI under applied stress. Notably, the presence of nitrogen in 316LN austenitic stainless steel (SS) would enhance the corrosion resistance compared to the nitrogen-absent 316L SS. To clarify the CDI behaviors, electrochemical corrosion experiments were performed on 316LN specimens under different applied stress levels. Complementary analyses, including three-dimensional morphological examinations by KH-7700 digital microscope and scanning electron microscopy coupled with energy dispersive spectroscopy, were conducted to investigate the macroscopic and microscopic corrosion morphology and to characterize the composition of corrosion products within pits. Furthermore, ion chromatography was used to analyze the solution composition variations after immersion corrosion tests of 316LN in a 6 wt.% FeCl3 solution compared to original FeCl3 solution. Electrochemical experiment results revealed the linear decrease in free corrosion potential with increasing applied stress. Electrochemical impedance spectroscopy results indicated that high tensile stress level damaged the integrity of passivation film, as evidenced by the remarkable reduction in electrochemical impedance. Ion chromatography analyses proved the concentrations increase of NO3 and NH4+ ion concentrations in the corrosion media after corrosion tests.

Findings

The enhanced corrosion resistance of 316LN SS is attributable to the presence of nitrogen.

Research limitations/implications

The scope of this study is confined to the influence of tensile stress on the electrochemical corrosion of 316LN at ambient temperatures; it does not encompass the potential effects of elevated temperatures or compressive stress.

Practical implications

The resistance to stress electrochemical corrosion in SS may be enhanced through nitrogen alloying.

Originality/value

This paper presents a systematic investigation into the stress electrochemical corrosion of 316LN, marking the inaugural study of its impact on corrosion behaviors and underlying mechanisms.

目的 本文旨在探讨腐蚀-变形相互作用(CDI)对 316LN 在外加拉伸应力下的腐蚀行为和机理的影响。值得注意的是,与不含氮的 316L 不锈钢相比,316LN 奥氏体不锈钢(SS)中氮的存在会增强其耐腐蚀性。为了明确 CDI 行为,我们在不同外加应力水平下对 316LN 试样进行了电化学腐蚀实验。此外,还进行了补充分析,包括利用 KH-7700 数字显微镜和扫描电子显微镜结合能量色散光谱进行三维形态检查,以研究宏观和微观腐蚀形态,并确定凹坑内腐蚀产物的成分特征。此外,还使用离子色谱法分析了 316LN 在 6 wt.% FeCl3 溶液中浸泡腐蚀试验后与原始 FeCl3 溶液相比的溶液成分变化。电化学实验结果表明,随着施加应力的增加,自由腐蚀电位呈线性下降。电化学阻抗谱分析结果表明,高拉伸应力水平破坏了钝化膜的完整性,电化学阻抗的显著降低就是证明。离子色谱分析证明了腐蚀试验后腐蚀介质中 NO3- 和 NH4+ 离子浓度的增加。研究限制/意义本研究的范围仅限于拉伸应力对环境温度下 316LN 电化学腐蚀的影响,不包括高温或压缩应力的潜在影响。原创性/价值 本文对 316LN 的应力电化学腐蚀进行了系统研究,标志着首次研究应力对腐蚀行为和潜在机理的影响。
{"title":"Investigations on corrosion behavior of 316LN and 316L austenitic stainless steel under corrosion-deformation interactions","authors":"Sixian Rao, Changwei Zhang, Fei Zhao, Lei Bao, Xiaoyi Wang","doi":"10.1108/acmm-11-2023-2920","DOIUrl":"https://doi.org/10.1108/acmm-11-2023-2920","url":null,"abstract":"<h3>Purpose</h3>\u0000<p>This paper aims to explore the influence of corrosion-deformation interactions (CDI) on the corrosion behavior and mechanisms of 316LN under applied tensile stresses.</p><!--/ Abstract__block -->\u0000<h3>Design/methodology/approach</h3>\u0000<p>Corrosion of metals would be aggravated by CDI under applied stress. Notably, the presence of nitrogen in 316LN austenitic stainless steel (SS) would enhance the corrosion resistance compared to the nitrogen-absent 316L SS. To clarify the CDI behaviors, electrochemical corrosion experiments were performed on 316LN specimens under different applied stress levels. Complementary analyses, including three-dimensional morphological examinations by KH-7700 digital microscope and scanning electron microscopy coupled with energy dispersive spectroscopy, were conducted to investigate the macroscopic and microscopic corrosion morphology and to characterize the composition of corrosion products within pits. Furthermore, ion chromatography was used to analyze the solution composition variations after immersion corrosion tests of 316LN in a 6 wt.% FeCl<sub>3</sub> solution compared to original FeCl<sub>3</sub> solution. Electrochemical experiment results revealed the linear decrease in free corrosion potential with increasing applied stress. Electrochemical impedance spectroscopy results indicated that high tensile stress level damaged the integrity of passivation film, as evidenced by the remarkable reduction in electrochemical impedance. Ion chromatography analyses proved the concentrations increase of NO<sub>3</sub><sup>−</sup> and NH<sub>4</sub><sup>+</sup> ion concentrations in the corrosion media after corrosion tests.</p><!--/ Abstract__block -->\u0000<h3>Findings</h3>\u0000<p>The enhanced corrosion resistance of 316LN SS is attributable to the presence of nitrogen.</p><!--/ Abstract__block -->\u0000<h3>Research limitations/implications</h3>\u0000<p>The scope of this study is confined to the influence of tensile stress on the electrochemical corrosion of 316LN at ambient temperatures; it does not encompass the potential effects of elevated temperatures or compressive stress.</p><!--/ Abstract__block -->\u0000<h3>Practical implications</h3>\u0000<p>The resistance to stress electrochemical corrosion in SS may be enhanced through nitrogen alloying.</p><!--/ Abstract__block -->\u0000<h3>Originality/value</h3>\u0000<p>This paper presents a systematic investigation into the stress electrochemical corrosion of 316LN, marking the inaugural study of its impact on corrosion behaviors and underlying mechanisms.</p><!--/ Abstract__block -->","PeriodicalId":8217,"journal":{"name":"Anti-corrosion Methods and Materials","volume":"43 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140630763","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
Effect of hydrogen on the pitting corrosion behavior of Incoloy 825 氢对 Incoloy 825 点蚀行为的影响
IF 1.2 4区 材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING Pub Date : 2024-04-12 DOI: 10.1108/acmm-08-2023-2869
Dongyang Li, Guanghu Yao, Yuyuan Guan, Yaolei Han, Linya Zhao, Lining Xu, Lijie Qiao

Purpose

In this paper, the authors aim to study the effect of hydrogen on the pitting corrosion behavior of Incoloy 825, a commonly used material for heat exchanger tubes in hydrogenated heat exchangers.

Design/methodology/approach

The pitting initiation and propagation behaviors were investigated by electrochemical and chemical immersion experiments and observed and analyzed by scanning electron microscope and energy dispersive spectrometer methods.

Findings

The results show that hydrogen significantly affects the electrochemical behavior of Incoloy 825; the self-corrosion potential decreased from −197 mV before hydrogen charging to −263 mV, −270 mV and −657 mV after hydrogen charging, and the corrosion current density increased from 0.049 µA/cm2 before hydrogen charging to 2.490 µA/cm2, 2.560 µA/cm2 and 2.780 µA/cm2 after hydrogen charging. The pitting susceptibility of the material increases.

Originality/value

Hydrogen is enriched on the precipitate, and the pitting corrosion also initiates at that location. The synergistic effect of hydrogen and precipitate destroys the passive film on the metal surface and promotes pitting initiation.

本文作者旨在研究氢气对 Incoloy 825 点蚀行为的影响,Incoloy 825 是氢化热交换器中热交换管的常用材料。结果表明,氢对 Incoloy 825 的电化学行为有显著影响;自腐蚀电位从充氢前的 -197 mV 下降到充氢后的 -263 mV、-270 mV 和 -657 mV,腐蚀电流密度从充氢前的 0.049 µA/cm2 上升到充氢后的 2.490 µA/cm2、2.560 µA/cm2 和 2.780 µA/cm2。材料的点蚀敏感性也随之增加。氢和沉淀物的协同作用破坏了金属表面的被动膜,促进了点蚀的发生。
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引用次数: 0
A novel method for estimation of electrode kinetics parameters 估算电极动力学参数的新方法
IF 1.2 4区 材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING Pub Date : 2024-04-04 DOI: 10.1108/acmm-12-2023-2929
Yongjing Wang, Yingwei Liu

Purpose

The purpose of this paper is to extract electrochemical reaction kinetics parameters, such as Tafel slope, exchange current density and equilibrium potential, which cannot be directly measured, this study aims to propose an improved particle swarm optimization (PSO) algorithm.

Design/methodology/approach

In traditional PSO algorithms, each particle’s historical optimal solution is compared with the global optimal solution in each iteration step, and the optimal solution is replaced with a certain probability to achieve the goal of jumping out of the local optimum. However, this will to some extent undermine the (true) optimal solution. In view of this, this study has improved the traditional algorithm: at each iteration of each particle, the historical optimal solution is not compared with the global optimal solution. Instead, after all particles have iterated, the optimal solution is selected and compared with the global optimal solution and then the optimal solution is replaced with a certain probability. This to some extent protects the global optimal solution.

Findings

The polarization curve plotted by this equation is in good agreement with the experimental values, which demonstrates the reliability of this algorithm and provides a new method for measuring electrochemical parameters.

Originality/value

This study has improved the traditional method, which has high accuracy and can provide great support for corrosion research.

本文的目的是提取无法直接测量的电化学反应动力学参数,如塔菲尔斜率、交换电流密度和平衡电位等,本研究旨在提出一种改进的粒子群优化(PSO)算法。在传统的 PSO 算法中,每个粒子的历史最优解都会在每个迭代步骤中与全局最优解进行比较,并以一定的概率替换最优解,以实现跳出局部最优的目标。然而,这会在一定程度上破坏(真正的)最优解。有鉴于此,本研究对传统算法进行了改进:在每个粒子的每次迭代中,不将历史最优解与全局最优解进行比较。取而代之的是,在所有粒子迭代之后,选择最优解并与全局最优解进行比较,然后以一定的概率替换最优解。研究结果该方程绘制的极化曲线与实验值非常吻合,这证明了该算法的可靠性,并为测量电化学参数提供了一种新方法。
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引用次数: 0
Effect of micro-particles on cavitation erosion behavior of 2Cr3WMoV steel 微颗粒对 2Cr3WMoV 钢气蚀行为的影响
IF 1.2 4区 材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING Pub Date : 2024-03-29 DOI: 10.1108/acmm-06-2023-2839
Han Zhao, Qingmiao Ding, Yaozhi Li, Yanyu Cui, Junjie Luo

Purpose

This paper aims to study the influence of microparticles on the surface cavitation behavior of 2Cr3WMoV steel; microparticle suspensions of different concentration, particle size, material and shape were prepared based on ultrasonic vibration cavitation experimental device.

Design/methodology/approach

2Cr3WMoV steel was taken as the research object for ultrasonic cavitation experiment. The morphology, quantity and distribution of cavitation pits were observed and analyzed by metallographic microscope and scanning electron microscope.

Findings

The study findings showed that the surface cavitation process produced pinhole cavitation pits on the surface of 2Cr3WMoV steel. High temperature in the process led to oxidation and carbon precipitation on the material surface, resulting in the “rainbow ring” cavitation morphology. Both the concentration and size of microparticles affected the number of pits on the material surface. When the concentration of microparticles was 1 g/L, the number of pits reached the maximum, and when the size of microparticles was 20 µm, the number of pits reached the minimum. The microparticles of Fe3O4, Al2O3, SiC and SiO2 all increased the number of pits on the surface of 2Cr3WMoV steel. In addition, the distribution of pits of spherical microparticles was more concentrated than that of irregularly shaped microparticles in turbidity.

Originality/value

Most of the current studies have not systematically focused on the effect of each factor of microparticles on the cavitation behavior when they act separately, and the results of the studies are more scattered and varied. At the same time, it has not been found to carry out the study of microparticle cavitation with 2Cr3WMoV steel as the research material, and there is a lack of relevant cavitation morphology and experimental data.

目的 本文以2Cr3WMoV钢为研究对象,基于超声振动空化实验装置制备了不同浓度、粒度、材料和形状的微颗粒悬浮液,研究了微颗粒对2Cr3WMoV钢表面空化行为的影响。研究结果表明,表面空化过程在 2Cr3WMoV 钢表面产生了针孔状空化凹坑。空化过程中的高温导致了材料表面的氧化和碳析出,形成了 "彩虹环 "空化形态。微颗粒的浓度和大小都会影响材料表面凹坑的数量。当微粒的浓度为 1 g/L 时,凹坑的数量达到最大;当微粒的大小为 20 µm 时,凹坑的数量达到最小。Fe3O4、Al2O3、SiC 和 SiO2 微颗粒都增加了 2Cr3WMoV 钢表面的凹坑数量。此外,在浊度方面,球形微粒的凹坑分布比不规则形状微粒的凹坑分布更集中。 原创性/价值目前的大多数研究都没有系统地关注微粒的各个因素在单独作用时对空化行为的影响,研究结果也较为分散和多样。同时,尚未发现以 2Cr3WMoV 钢为研究材料开展微颗粒空化研究,缺乏相关的空化形态和实验数据。
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引用次数: 0
Research of antiaging behavior of a new sealing coating for color painting cultural relics 彩绘文物新型密封涂层的抗老化性能研究
IF 1.2 4区 材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING Pub Date : 2024-03-26 DOI: 10.1108/acmm-08-2023-2874
Chao Li, Jin Gao, Qingqing Xu, Xuemei Yang, Kui Xiao, Xiangna Han

Purpose

The color painting of ancient buildings has high historical and artistic value but is prone to aging due to long-term outdoor exposure. The purpose of this study is to develop a new type of sealing coating to mitigate the impact of ultraviolet (UV) light on color painting.

Design/methodology/approach

The new coating was subjected to a 500-h UV-aging test. Compared with the existing acrylic resin Primal AC33, the UV aging behavior of the new coating, such as color difference and gloss, was studied with aging time. The Fourier infrared spectra of the coatings were analyzed after the UV-aging test.

Findings

Compared with AC33, the antiaging performance of SF8 was substantially improved. SF8 has a lower color difference value and better light retention and hydrophobicity. The Fourier transform infrared spectroscopy results showed that the C-F bond and Si-O bonds in the resin of the optimized sealing coating protected the main chain C-C structure from degradation during the aging process; thus, the resin maintained good stability. The hindered amine light stabilizer TN292 added to the coating inhibited the antiaging process by trapping active free radicals.

Originality/value

To address the problem of UV aging of oil-decorated colored paintings, a new type of sealing coating with excellent antiaging properties was developed, laying the foundation for its demonstration application on the surface of ancient buildings.

目的古建筑彩画具有很高的历史和艺术价值,但由于长期暴露在户外,容易老化。本研究旨在开发一种新型密封涂料,以减轻紫外线(UV)对彩画的影响。与现有的丙烯酸树脂 Primal AC33 相比,研究了新涂料的紫外线老化行为,如色差和光泽度随老化时间的变化。结果与 AC33 相比,SF8 的抗老化性能大幅提高。SF8 的色差值更低,保光性和疏水性更好。傅立叶变换红外光谱结果表明,优化密封涂层树脂中的 C-F 键和 Si-O 键保护了主链 C-C 结构在老化过程中不发生降解,因此树脂保持了良好的稳定性。原创性/价值 针对油饰彩画紫外线老化的问题,开发了一种具有优异抗老化性能的新型密封涂料,为其在古建筑表面的示范应用奠定了基础。
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引用次数: 0
期刊
Anti-corrosion Methods and Materials
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