Cr13不锈钢在盐酸溶液喷射冲刷作用下的表面腐蚀形貌表征

doi:10.11902/1005.4537.2014.003

中国腐蚀与防护学报

2014, Vol. 34

Issue (5): 439-444 DOI: 10.11902/1005.4537.2014.003

本期目录 | 过刊浏览

Cr13不锈钢在盐酸溶液喷射冲刷作用下的表面腐蚀形貌表征

程从前¹, 曹铁山¹, 王冬颖², 姚景文², 王健¹, 关锰², 赵杰¹(

)

1. 大连理工大学材料科学与工程学院大连 116085
2. 沈阳鼓风机集团有限公司核电事业部沈阳 110001

Erosion-corrosion Morphology of Cr13 Stainless Steel Induced by Jet Flow of Hydrochloric Acid Solution

CHENG Congqian¹, CAO Tieshan¹, WANG Dongying², YAO Jingwen², WANG Jian¹, GUAN Meng², ZHAO Jie¹(

)

1. School of Materials Science and Engineering, Dalian University of Technology, Dalian 116085, China
2. Nuclear Division, Shenyang Blower Works Group Co. Ltd, Shenyang 110001, China

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摘要:

研究了Cr13马氏体不锈钢在盐酸喷射条件下腐蚀形貌的局部差异。结果表明,射流与样品表面接触中心区域产生圆状点蚀坑、中心区的四周形成放射性分布的彗星状腐蚀沟槽；随腐蚀时间延长,蚀坑和沟槽密度增加；彗星状腐蚀沟槽由点蚀坑和尾部的沟槽组成；点蚀坑起源于MnS夹杂处,彗星尾部沟槽主要发生在马氏体区,而δ 铁素体区没有明显腐蚀。

关键词 ：不锈钢, 冲刷, 腐蚀形貌, 点蚀, 夹杂物

Abstract：

Erosion-corrosion morphology of Cr13 stainless steel induced by jet flow of hydrochloric acid solution was characterized by means of SEM. Round-shaped pits was observed on the surface site corresponding to the center of impingement area of the jet flow. Around the center area, there exist radial patterns of comet-like grooves. The density of pits and grooves increases with increasing corrosion time. SEM micrographs reveal that the comet-like grooves composed of a pit as its head and a swallow-like groove as its tail, of which the head is initiated on the inclusion MnS particles; however, the tail is mainly laid on site of the martensite, while no obvious corrosion occurs on the δ-Ferrite zone of the steel.

Key words： stainless steel impingement corrosion morphology pit inclusion

ZTFLH:

TG172

基金资助:国家自然科学基金项目 (51101024和51101037) 资助

作者简介: null

程从前，男，1982年生，博士，讲师，研究方向为不锈钢装备制造相关的腐蚀

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引用本文:

程从前, 曹铁山, 王冬颖, 姚景文, 王健, 关锰, 赵杰. Cr13不锈钢在盐酸溶液喷射冲刷作用下的表面腐蚀形貌表征[J]. 中国腐蚀与防护学报, 2014, 34(5): 439-444.
Congqian CHENG, Tieshan CAO, Dongying WANG, Jingwen YAO, Jian WANG, Meng GUAN, Jie ZHAO. Erosion-corrosion Morphology of Cr13 Stainless Steel Induced by Jet Flow of Hydrochloric Acid Solution. Journal of Chinese Society for Corrosion and protection, 2014, 34(5): 439-444.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2014.003 或 https://www.jcscp.org/CN/Y2014/V34/I5/439

图1 冲刷腐蚀实验回路示意图

表1 Cr13不锈钢不同组织的显微硬度

图2 Cr13不锈钢金相组织及显微压痕图

图3 冲刷腐蚀60 min后Cr13不锈钢表面形貌

图4 黑色彗星状条纹的典型形貌

图5 Cr13不锈钢腐蚀不同时间后不同区域黑色点状和彗星状条纹的密度

图6 图3a中B区域彗星状条纹的SEM像

图7 Cr13不锈钢冲刷腐蚀15 min后蚀坑的EDS面扫描结果

图8 Cr13不锈钢冲刷腐蚀180 min后彗星状条纹头部附近的EDS面扫描结果

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