[1]孙晓军,殷小健,李旭健,等.doi: 10.3969/j.issn.1001-3849.2025.08.016冷变形对GH2132板材的电化学腐蚀性能影响[J].电镀与精饰,2025,(08):107-112.
　Sun Xiaojun,Yin Xiaojian*,Li Xujian,et al.Effect of cold deformation on electrochemical corrosion properties of GH2132 plate[J].Plating & Finishing,2025,(08):107-112.
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doi: 10.3969/j.issn.1001-3849.2025.08.016冷变形对GH2132板材的电化学腐蚀性能影响()

《电镀与精饰》[ISSN:1001-3849/CN:12-1096/TG]

卷:
期数:
2025年08
页码:
107-112
栏目:
出版日期:
2025-08-31

文章信息/Info

Title:
Effect of cold deformation on electrochemical corrosion properties of GH2132 plate
作者:
孙晓军1; 殷小健1; 李旭健1; 柯书忠1; 高 达2; 马 叙2; 王洪健3
(1. 河南航天精工制造有限公司 河南省紧固连接技术重点实验室,河南 信阳 464000 ;2. 天津理工大学 材料科学与工程学院 天津市金属材料高效近净成型技术工程中心,天津 300384 ;3. 天津华北集团有限公司 天津市电工铜质线材企业重点实验室,天津 300406)
Author(s):
Sun Xiaojun1;  Yin Xiaojian1*;  Li Xujian1;  Ke Shuzhong1;  Gao Da2;  Ma Xu2;  Wang Hongjian3
(1. Henan Aerospace Precision Manufacturing Co., Ltd., Henan Provincial Key Laboratory of Fastening Technology, Xinyang 464000, China; 2. Tianjin Engineering Center of Near-Net Shape Forming Technology for Metallic Materials, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China; 3. Tianjin Electrician Copper Wire Enterprise Key Laboratory, Tianjin Huabei Group Co., Ltd., Tianjin 300406, China)
关键词:
GH2132; 预变形; 电化学腐蚀; 阳极极化; 交流阻抗
Keywords:
GH2132;  pre-deformation;  electrochemical corrosion;  anodic polarization;  AC impedance
分类号:
TG147.1
文献标志码:
A
摘要:
本文利用金相显微镜、扫描电子显微镜探究了通过拉伸试验得到不同预变形的GH2132板材试件的板材的形貌、结构，并采用电化学工作站在3.5%的NaCl溶液中测试了试件的极化曲线和电化学阻抗谱图，分析了其电化学腐蚀性能。结果表明，随着预变形程度的增大，晶粒形态逐渐呈现出拉长、变窄趋势，GH2132板材自腐蚀电位从0.969 0 V降低到?0.480 5 V，自腐蚀电流密度从2.72 μA·cm?2升高到533.6 μA·cm?2。试件的点蚀扩展行为主要沿着轧制方向进行，且随着预变形量的不断增加，板材的点蚀现象愈发严重。预变形可能导致钝化膜破裂，暴露新鲜金属表面，直接与腐蚀介质接触。拉伸导致材料发生塑性变形，位错密度显著增加。位错在晶界或相界处堆积，形成微观缺陷(如空位、微裂纹)，这些缺陷成为腐蚀的优先路径，从而降低材料的耐腐蚀性能。
Abstract:
The morphology and structure of GH2132 sheets with different pre-deformation levels were investigated through metallographic microscopy and scanning electron microscopy. The anodic polarization curves and electrochemical impedance spectra of the specimens were tested in a 3.5% NaCl solution using an electrochemical workstation, and their electrochemical corrosion performance was analyzed. The results indicate that as the pre-deformation degree increases, the grain morphology gradually shows a trend of elongation and narrowing. The self-corrosion potential of GH2132 sheet decreases from 0.969 0 V to ?0.480 5 V, while the self-corrosion current density increases from 2.72 μA·cm?2 to 533.6 μA·cm ?2. The pitting corrosion propagation behavior of the specimen mainly occurs along the rolling direction, and with the continuous increase of pre deformation, the pitting corrosion phenomenon of the plate becomes more severe. Pre deformation may cause the passivation film to rupture, exposing the fresh metal surface and allowing it to come into direct contact with the corrosive medium. Stretching causes plastic deformation of the material, resulting in a significant increase in dislocation density. Dislocations accumulate at grain boundaries or phase boundaries, forming micro defects (such as vacancies, microcracks) that become the preferred path for corrosion, thereby reducing the corrosion resistance of the material

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更新日期/Last Update: 2025-08-11