表面处理工艺对TC4钛合金微弧氧化膜层及电偶电流的影响

doi:10.11902/1005.4537.2020.159

中国腐蚀与防护学报

2021, Vol. 41

Issue (6): 905-908 DOI: 10.11902/1005.4537.2020.159

研究报告

本期目录 | 过刊浏览

表面处理工艺对TC4钛合金微弧氧化膜层及电偶电流的影响

杨胜¹^,², 张慧杰¹(

), 向午渊¹, 欧阳涛¹, 肖芬¹, 周慧¹

^1.湖南湘投金天科技集团有限责任公司长沙 410012
^2.南方海洋科学与工程广东省实验室 (珠海) 海洋工程材料与腐蚀控制创新团队珠海 519080

Effect of Post Surface Treatment of Micro-arc Oxidation Films/TC4 Ti-alloy on Their Morphology and Galvanic Corrosion Performance

YANG Sheng¹^,², ZHANG Huijie¹(

), XIANG Wuyuan¹, OUYANG Tao¹, XIAO Fen¹, ZHOU Hui¹

^1.Hunan Xiangtu Jintian Science and Technology Group Co. Ltd. , Changsha 410012, China
^2.Innovation Group of Marine Engineering Materials and Corrosion Control, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519080, China

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摘要:

利用扫描电镜及电化学工作站研究了经不同处理后TC4钛合金的微弧氧化膜层微观形貌和电偶电流密度。结果表明：高温氧化未使微弧氧化膜层表面形貌发生明显改变；TC4钛合金与钢接触时极易发生电偶腐蚀，不能直接接触使用；对钛合金进行微弧氧化处理后可降低电偶电流密度及电偶腐蚀敏感性；硅烷化封孔处理对微弧氧化膜层的电偶电流密度影响甚小；微弧氧化后进行高温氧化及硅烷化封孔处理明显降低TC4钛合金的电偶电流密度。

关键词 ： TC4钛合金, 高温氧化, 微弧氧化, 电偶电流

Abstract：

MAO (Micro-arc oxidation) films on TC4 Ti-alloy was prepared, and which then subjected to different post-treatments such as silanization sealing and high temperature oxidation. The MAO/TC4 Ti-alloy before and after post-treatments was characterized by SEM and electrochemical workstation in terms of their surface morphology and performance in galvanic corrosion. The results shows that the surface morphology of the micro-arc oxide film is not significantly changed by high temperature oxidation. TC4 Ti-alloy can easily be suffered from galvanic corrosion when contacting with steel, while the galvanic current density and galvanic corrosion sensitivity of TC4 Ti-alloy couple can be reduced after micro-arc oxidation treatment. The galvanic current density of MAO/TC4 Ti-alloy couple is little affected by silanization sealing treatment, but it is obviously reduced by combined treatments of high temperature oxidation and then silanization sealing.

Key words： TC4 Ti-alloy high temperature oxidation micro-arc oxidation galvanic corrosion

收稿日期: 2020-09-04

ZTFLH:

TG174.4

基金资助:湖南省科技创新计划(2017GK2292);湖南省企业科;技创新创业团队支持计划(2018TP2046)

通讯作者: 张慧杰 E-mail: 349502439@qq.com

Corresponding author: ZHANG Huijie E-mail: 349502439@qq.com

作者简介: 杨胜，男，1975年生，博士，高级工程师

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引用本文:

杨胜, 张慧杰, 向午渊, 欧阳涛, 肖芬, 周慧. 表面处理工艺对TC4钛合金微弧氧化膜层及电偶电流的影响[J]. 中国腐蚀与防护学报, 2021, 41(6): 905-908.
Sheng YANG, Huijie ZHANG, Wuyuan XIANG, Tao OUYANG, Fen XIAO, Hui ZHOU. Effect of Post Surface Treatment of Micro-arc Oxidation Films/TC4 Ti-alloy on Their Morphology and Galvanic Corrosion Performance. Journal of Chinese Society for Corrosion and protection, 2021, 41(6): 905-908.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2020.159 或 https://www.jcscp.org/CN/Y2021/V41/I6/905

图1 高温氧化前后的微弧氧化膜层微观形貌

图2 高温氧化前后微弧氧化膜层封孔后微观形貌

图3 不同处理工艺条件下TC4钛合金-钢电偶电流-时间曲线

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