曹文健,汤智慧,原玲,杨瑞,刘虎,辛龑.钛合金紧固件用铝涂层抗电偶腐蚀行为研究[J].装备环境工程,2016,13(1):116-120,125. CAO Wen-jian,TANG Zhi-hui,YUAN Ling,YANG Rui,LIU Hu,XIN Yan.Behaviour of Galvanic Corrosion Resistance of Aluminum Coating on Titanium Alloy Fastener[J].Equipment Environmental Engineering,2016,13(1):116-120,125.
钛合金紧固件用铝涂层抗电偶腐蚀行为研究
Behaviour of Galvanic Corrosion Resistance of Aluminum Coating on Titanium Alloy Fastener
投稿时间：2015-10-16  修订日期：2016-02-15
DOI：10.7643/issn.1672-9242.2016.01.022
中文关键词:  钛合金紧固件  铝涂层  电偶腐蚀  电偶腐蚀电流
英文关键词:titanium alloy fastener  aluminum coating  galvanic corrosion  galvanic corrosion current
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作者单位
曹文健 北京航空材料研究院 航空材料先进腐蚀与防护航空科技重点实验室 ，北京 100095 
汤智慧 北京航空材料研究院 航空材料先进腐蚀与防护航空科技重点实验室 ，北京 100095 
原玲 北京航空材料研究院 航空材料先进腐蚀与防护航空科技重点实验室 ，北京 100095 
杨瑞 北京航空材料研究院 航空材料先进腐蚀与防护航空科技重点实验室 ，北京 100095 
刘虎 北京航空材料研究院 航空材料先进腐蚀与防护航空科技重点实验室 ，北京 100095 
辛龑 北京航空材料研究院 航空材料先进腐蚀与防护航空科技重点实验室 ，北京 100095 
AuthorInstitution
CAO Wen-jian Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material，Beijing Institute of Aeronautical Materials, Beijing 100095，China 
TANG Zhi-hui Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material，Beijing Institute of Aeronautical Materials, Beijing 100095，China 
YUAN Ling Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material，Beijing Institute of Aeronautical Materials, Beijing 100095，China 
YANG Rui Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material，Beijing Institute of Aeronautical Materials, Beijing 100095，China 
LIU Hu Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material，Beijing Institute of Aeronautical Materials, Beijing 100095，China 
XIN Yan Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material，Beijing Institute of Aeronautical Materials, Beijing 100095，China 
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中文摘要:
      目的 研究铝涂层对钛合金紧固件连接铝构件时抗电偶腐蚀的作用。方法 采用电偶腐蚀电流、 开路电位、 极化曲线、 电化学交流阻抗等电化学测试技术， 分析评价了钛合金紧固件表面用铝涂层的抗电偶腐蚀性能。结果 无涂层TC4钛合金和2024铝合金组成的电偶对存在严重的电偶腐蚀；TC4钛合金表面制备铝涂层后， 自腐蚀电位从-267 V升高到213 V ， 表面电阻从771.6Ω升高到2.59×108 Ω， 与2024铝合金组成电偶对的电偶电流密度从80.51 μA/cm2下降到0.45 μA/cm2， 其电偶腐蚀等级为B。结论 铝涂层可以有效地防止电偶腐蚀。
英文摘要:
      Objective To study the anti-galvanic corrosion effect of aluminum coating on titanium alloy fastener connected with aluminum components. Methods The anti-galvanic corrosion performance of aluminum coating on TC4 titanium alloy fastener was evaluated through galvanic corrosion current, open circuit potential, polarization curve and AC impedance in this paper. Results The results indicated that the serious galvanic corrosion easily occurred when TC4 titanium alloy without aluminum coating was coupled with 2024 aluminum alloy. However, the galvanic corrosion decreased for the galvanic couple of TC4 titanium alloy with aluminum coating and 2024 aluminum alloy. The galvanic current density decreased from 80.51 μ A/cm2 to 0.45 μ A/cm2, and the galvanic corrosion grade was B. Also the self-corrosion potential increased from -267 v to -103 v and the surface resistance increased from 771.6 Ω to 2.59×108 Ω. Conclusion The test results showed that aluminum coating can effectively prevent galvanic corrosion of titanium alloy fastener/aluminum alloy substrate.
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