激光表面处理17-4PH不锈钢的电化学腐蚀行为

中国腐蚀与防护学报

2012, Vol. 32

Issue (3): 210-216

研究报告

本期目录 | 过刊浏览

激光表面处理17-4PH不锈钢的电化学腐蚀行为

李众^1,2,张峻巍¹,孟国哲²,孙飞龙²,邵亚薇²,张涛²

1. 辽宁科技大学材料与冶金学院鞍山 114051
2. 哈尔滨工程大学材料与化工学院哈尔滨 150001

ELECTROCHEMICAL CORROSION BEHAVIOR OF 17-4PH STAINLESS STEEL WITH LASER SURFACE MELTING TREATMENT

LI Zhong^1,2, ZHANG Junwei¹, MENG Guozhe², SUN Feilong², SHAO Yawei², ZHANG Tao²

1. School of Material and Metallurgy, University of Science and Technology Liaoning, Anshan 114051
2. School of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001

全文: PDF(2711 KB)

摘要: 利用动电位极化、电化学阻抗等电化学测试技术，结合金相观察和扫描电镜(SEM)观察，系统研究了特定激光功率(1600 W)条件下激光表面强化处理工艺参数对17-4PH不锈钢在3.5% NaCl溶液中腐蚀行为的影响。结果表明：采取表面使用吸光剂X、激光扫速为6 mm/s的工艺参数处理的17-4PH不锈钢试样的耐腐蚀性能最佳。同时表明只有当吸光剂和扫描速度达到良好配合时，才能获得较为均匀的组织，从而显著提高激光表面硬化层的耐腐蚀性能。当吸光剂与扫描速度不匹配时，激光表面处理后，会产生不均匀的表面组织，材料耐蚀性能会严重下降，在腐蚀环境中使用时，易发生严重的点蚀。

关键词 ： 17-4PH不锈钢, 激光表面强化, 电化学阻抗

Abstract：The effects of laser parameters at a constant laser power (1600W) on the corrosion behavior of 17-4PH stainless steel were investigated in 3.5% NaCl solution by potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) technique, combined with optical microscopy and scanning electron microscopy (SEM) observation. The results showed that sample A, which was treated by laser surface melting process with light-absorption X and scanning speed of 6 mm/s, possessed the highest corrosion resistance. The results also demonstrated that the homogeneous microstructure was obtained only when the light-absorption and the scanning speed matched well (such as the light-absorption X and scanning speed 6 mm/s), leading the enhancement of the corrosion resistance; otherwise the heterogeneous would be obtained (such as the light-alsorlant Y and scanning speed 6 mm/s), leading to the degradation of the corrosion resistance and the material would suffer serious pitting corrosion when it was used in the corrosive environment.

Key words： 17-4PH stainless steel laser surface treatment EIS

收稿日期: 2011-04-08

ZTFLH:

TG172

基金资助:

国家自然科学基金项目(50971050)资助

通讯作者: 孟国哲 E-mail: mengguozhe@hrbeu.edu.cn

Corresponding author: MENG Guozhe E-mail: mengguozhe@hrbeu.edu.cn

作者简介: 李众，女，1988年生，研究方向为腐蚀防护

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引用本文:

李众,张峻巍,孟国哲,孙飞龙,邵亚薇,张涛. 激光表面处理17-4PH不锈钢的电化学腐蚀行为[J]. 中国腐蚀与防护学报, 2012, 32(3): 210-216.
LI Yin. ELECTROCHEMICAL CORROSION BEHAVIOR OF 17-4PH STAINLESS STEEL WITH LASER SURFACE MELTING TREATMENT. J Chin Soc Corr Pro, 2012, 32(3): 210-216.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2012/V32/I3/210

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