摘要
由于舰船由多种材料构成,当这些结构材料位于同一体系而未使用电绝缘措施时,极易发生电偶腐蚀。通过筛选舰船常用金属材料,对15对异金属偶对开展电偶腐蚀试验,来获取舰船用金属材料的电偶腐蚀特性。结果表明:TA2与ZTA5作阴极时与其他金属作阴极时相比,阳极腐蚀速率更快,偶合电位较负,且随面积比的增加电偶腐蚀速率呈现加快的趋势;铜合金B10及不锈钢316L电偶腐蚀性相差不大;907与其他金属相连时偶合电位较负,极易发生电偶腐蚀,应注意电绝缘防护。因此钛合金应避免与其他金属直接偶接,907与其他金属相连时必须使用电绝缘防护。
Surface ships are made of many metallic materials,and galvanic corrosion is easy to occur when these materials in the same system are without insulation.In this work,the common metallic materials used in ships were selected to form 15 kinds of different metal galvanic couples for conducting galvanic corrosion tests,and the galvanic corrosion characteristics of metallic materials used in surface ships were obtained.Results showed that in the comparisons of other metals,TA2 and ZTA5 used as cathodes got the faster anodic corrosion rate and the more negative coupling potential was negative,and the galvanic corrosion rate increased as the area ratio increased.Moreover,copper alloy B10 and stainless steel 316 L had little difference in galvanic corrosion.When 907 was connected with other metals,the coupling potential was more negative,which was very easy to occur galvanic corrosion,so attention should be paid to the protection of electrical insulation.Therefore,titanium alloys should be avoided directly coupling with other metals,and 907 used on surface ships must to be treated with electrical insulation when connected with other metals.
作者
武兴伟
黄璐琼
孙启
WU Xing-wei;HUANG Lu-qiong;SUN Qi(Marine Design and Research Institute of China,Shanghai 200010,China)
出处
《材料保护》
CAS
CSCD
2021年第4期36-40,106,共6页
Materials Protection
关键词
舰船
金属材料
钛合金
铜合金
不锈钢
电偶腐蚀
surface ships
metallic materials
titanium alloy
copper alloy
stainless steel
galvanic corrosion
