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基于激光清洗的AH32钢的电化学腐蚀性能

Electrochemical Corrosion Properties of AH32 Steel via Laser Cleaning

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摘要

为研究激光清洗对钢铁耐蚀性的影响,采用电化学方法研究激光清洗的AH32钢在3.5%(质量分数)NaCl溶液中的电化学腐蚀行为,并对试样的极化曲线、电化学阻抗谱和表面形貌进行测试与分析。结果表明:激光清洗改善了AH32钢的耐蚀性;在材料的损伤阈值内,随着激光能量密度和光斑搭接率增大,AH32钢的自腐蚀电位正向移动,腐蚀电流密度降低,阻抗弧变大,耐蚀性增加;当激光能量密度为20 J/cm 2、光斑搭接率为50%时,AH32钢的耐蚀性最佳。该结果可为研究纳秒脉冲激光清洗后材料的表面性能提供参考依据。

Abstract

The electrochemical corrosion behavior of laser-cleaned AH32 steel in 3.5% (mass fraction) NaCl solution was studied herein through the electrochemical method to investigate the effect of laser cleaning (LC) on the corrosion resistance of steel. The polarization curve, electrochemical impedance spectroscopy, and surface morphology of the sample were tested and analyzed. Results show that the corrosion resistance of AH32 steel is improved post LC. Within the material damage threshold, the self-corrosion potential of AH32 steel moves in a positive direction with increasing laser energy density and spot overlap rate; simultaneously, the corrosion current density decreases, and the impedance arc becomes larger, thereby the corrosion resistance increases. The corrosion resistance of AH32 steel is the best when the laser energy density is 20 J/cm 2, and the spot overlap ratio is 50%. These results can provide a reference for studying surface properties post nanosecond pulse LC.

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DOI:10.3788/LOP56.211403

所属栏目:激光器与激光光学

基金项目:江苏省重点研发计划;

收稿日期:2019-03-14

修改稿日期:2019-05-06

网络出版日期:2019-11-01

作者单位    点击查看

李华婷
周建忠:江苏大学机械工程学院,江苏 镇江 212013
孙奇:江苏大学机械工程学院,江苏 镇江 212013
高辽远:江苏大学机械工程学院,江苏 镇江 212013
朱明:江苏大学机械工程学院,江苏 镇江 212013
郭召恒:江苏大学机械工程学院,江苏 镇江 212013
杨嘉年:江苏大学机械工程学院,江苏 镇江 212013
付强:南京先进激光技术研究院, 江苏 南京 210038

联系人作者:李华婷(18851401352@163.com); 周建忠(zhoujz@ujs.edu.cn);

备注:江苏省重点研发计划;

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引用该论文

Li Huating,Zhou Jianzhong,Sun Qi,Gao Liaoyuan,Zhu Ming,Guo Zhaoheng,Yang Jianian,Fu Qiang. Electrochemical Corrosion Properties of AH32 Steel via Laser Cleaning[J]. Laser & Optoelectronics Progress, 2019, 56(21): 211403

李华婷,周建忠,孙奇,高辽远,朱明,郭召恒,杨嘉年,付强. 基于激光清洗的AH32钢的电化学腐蚀性能[J]. 激光与光电子学进展, 2019, 56(21): 211403

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