海上风电用42CrMo轴承钢的电化学行为  

Electrochemical Behavior of 42CrMo Bearing Steel for Offshore Wind Power

作　　者：何武豪 郭同翰 冯宇芹 孙美慧 杨思懿 周溢 吴伟 HE Wuhao;GUO Tonghan;FENG Yuqin;SUN Meihui;YANG Siyi;ZHOU Yi;WU Wei(School of Mechanical and Vehicle Engineering,Nanchang Institute of Science&Technology,Nanchang 330108,China;Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power,School of Environmental and Chemical Engineering,Shanghai University of Electric Power,Shanghai 201306,China;Ansteel Beijing Research Institute Co.,Ltd.,Beijing 102211,China)

机构地区：[1]南昌工学院机械与车辆工程学院,南昌330108 [2]上海电力大学环境与化学工程学院上海市电力材料防护与新材料重点实验室,上海201306 [3]鞍钢集团北京研究院有限公司,北京102211

出　　处：《腐蚀与防护》2025年第4期9-15,21,共8页Corrosion & Protection

基　　金：国家自然科学基金(52471084);上海市教委项目一般项目(Z2024-122);江西省教育厅科学技术研究项目(GJJ2202904)。

摘　　要：采用开路电位、电化学阻抗谱和动电位极化测试等手段研究了42CrMo轴承钢在3.5%NaCl溶液中的电化学行为,并研究了温度和腐蚀时间对其电化学过程的影响规律。结果表明:42CrMo轴承钢在3.5%NaCl溶液中的电化学过程以活化溶解为主;且随着温度的升高和浸泡时间的延长,42CrMo钢的电化学活性显著增加,其电荷转移电阻Rct显著降低,自腐蚀电流密度Jcorr则显著提高,表明其耐蚀性下降。腐蚀形貌分析发现,42CrMo轴承钢的表面以局部腐蚀为主,伴随着点蚀坑的特征。The electrochemical behavior of 42CrMo bearing steel in 3.5%NaCl solution was studied by means of open circuit potential,electrochemical impedance spectroscopy and potentiodynamic polarization tests,and the influence of temperature and corrosion time on the electrochemical process were studied.The results show that the electrochemical process of 42CrMo bearing steel in 3.5%NaCl solution was mainly activated dissolution.With the increase of temperature and immersion time,the electrochemical activity of 42CrMo steel increased significantly,behaving a decreasing Rct value and an increasing Jcorr value.This change indicated the significant decrease in corrosion resistance.Macromorphology analysis showed that the surface of 42CrMo bearing steel in 3.5%NaCl solution was mainly localized corrosion,accompanied by corrosion pit characteristics.

关 键 词：海上风电 轴承钢 电化学 腐蚀形貌 动电位极化 

分 类 号：TG172[金属学及工艺—金属表面处理]