海洋大气环境下TC4钛合金与316L不锈钢铆接件腐蚀行为研究

doi:10.11902/1005.4537.2018.183

中国腐蚀与防护学报

2020, Vol. 40

Issue (2): 167-174 DOI: 10.11902/1005.4537.2018.183

研究报告

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海洋大气环境下TC4钛合金与316L不锈钢铆接件腐蚀行为研究

胡玉婷, 董鹏飞, 蒋立, 肖葵(

), 董超芳, 吴俊升, 李晓刚

北京科技大学新材料技术研究院北京 100083

Corrosion Behavior of Riveted Joints of TC4 Ti-Alloy and 316L Stainless Steel in Simulated Marine Atmosphere

HU Yuting, DONG Pengfei, JIANG Li, XIAO Kui(

), DONG Chaofang, WU Junsheng, LI Xiaogang

Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China

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摘要:

研究了TC4-316L异种金属铆接件在模拟海洋大气环境条件下的腐蚀行为。利用失重法、X射线光电子能谱分析 (XPS)、扫描电子显微镜 (SEM)、激光共聚焦显微镜等方法分析了试样的腐蚀动力学、锈层成分、腐蚀形貌。结果表明，TC4-316L铆接件在周期浸润实验1200 h后，316L不锈钢发生了腐蚀，而TC4钛合金并没有明显的腐蚀现象；316L不锈钢腐蚀产物包含FeOOH，Fe₃O₄和Fe₂O₃，而TC4钛合金表面主要为TiO₂和Ti₂O₃等钛的氧化物组成的氧化膜。与单件316L不锈钢相比，由于电偶腐蚀与缝隙腐蚀的共同作用，TC4-316L铆接件中的316L不锈钢腐蚀加速。

关键词 ：铆接件, 周浸实验, 钛合金, 316L不锈钢, 腐蚀行为

Abstract：

The corrosion behavior of riveted dissimilar metals TC4-316L in simulated marine atmospheric conditions was investigated by means of mass loss methods, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and confocal laser scanning microscopy. While the corrosion kinetics, rust composition, and corrosion morphology are mainly concerned. The results indicate 316L stainless steel is corroded when riveted parts TC4-316L were immersed in 3.5%NaCl solution periodically for 1200 h, but TC4 Ti-alloy has no obvious corrosion. The corrosion products of 316L stainless steel composed of FeOOH, Fe₃O₄ and Fe₂O₃, while the oxide scale formed on the surface of TC4 Ti-alloy is mainly TiO₂ and Ti₂O₃. Compared with the corrosion behavior of the bare 316L stainless steel, the 316L stainless steel with riveted TC4 Ti-alloy was suffered from accelerated corrosion due to the combined effect of galvanic corrosion and crevice corrosion.

Key words： riveted piece periodic immersion Ti-alloy 316L stainless steel corrosion behavior

收稿日期: 2018-12-21

ZTFLH:

TG174.3

基金资助:国家重点研发计划(2014CB643300)

通讯作者: 肖葵 E-mail: xiaokui@ustb.edu.cn

Corresponding author: XIAO Kui E-mail: xiaokui@ustb.edu.cn

作者简介: 胡玉婷，女，1992年生，博士生

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引用本文:

胡玉婷, 董鹏飞, 蒋立, 肖葵, 董超芳, 吴俊升, 李晓刚. 海洋大气环境下TC4钛合金与316L不锈钢铆接件腐蚀行为研究[J]. 中国腐蚀与防护学报, 2020, 40(2): 167-174.
Yuting HU, Pengfei DONG, Li JIANG, Kui XIAO, Chaofang DONG, Junsheng WU, Xiaogang LI. Corrosion Behavior of Riveted Joints of TC4 Ti-Alloy and 316L Stainless Steel in Simulated Marine Atmosphere. Journal of Chinese Society for Corrosion and protection, 2020, 40(2): 167-174.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2018.183 或 https://www.jcscp.org/CN/Y2020/V40/I2/167

图1 试样铆接示意图

图2 C组中TC4钛合金腐蚀后宏观形貌

图3 周浸腐蚀实验后3组试样中的316L不锈钢表面形貌

图4 除锈后3组试样中的316L不锈钢表面形貌

图5 A组试样除锈后表面典型点蚀坑形貌

图6 B组不锈钢除锈后表面典型点蚀坑形貌

图7 C组中不锈钢除锈后表面典型点蚀坑形貌

图8 3组试样在3.5%NaCl溶液中周浸1200 h后的SEM像

图9 周浸实验后316L不锈钢的EDS结果

图10 TC4钛合金表面的XPS结果

图11 316L不锈钢腐蚀产物XPS分析

图12 TC4钛合金和316L不锈钢在3.5%NaCl溶液中的开路电位

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