船用铜合金HAl67-2.5和H62的腐蚀行为及电偶腐蚀倾向性研究  

Study on Corrosion and Galvanic Corrosion of HAl67-2.5 and H62 Marine Copper Alloys

作　　者：张文利[1] 查小琴[1] 刘晓勇[1] 罗先甫[1] ZHANG Wenli, ZHA Xiaoqin, LIU Xiaoyong, LUO Xianfu(Luoyang Ship Material Research Institute, Luoyang 471023, China)

机构地区：[1]中国船舶重工集团公司第七二五研究所,河南洛阳471023

出　　处：《材料开发与应用》2018年第5期14-19,共6页Development and Application of Materials

摘　　要：以HAl67-2. 5铝黄铜和H62黄铜两种常用的船用铜合金为研究对象,在实验室内进行了电化学测试、人工海水浸泡和二者偶联的电偶腐蚀试验等一系列试验。结果表明,在抛光态下直接进行电化学测试,二者的电化学腐蚀性能较为接近,在人工海水浸泡条件下,HAl67-2. 5铝黄铜的腐蚀速率明显小于H62黄铜的,且两种铜合金均对缝隙腐蚀比较敏感,二者偶联之后在腐蚀介质中有明显的电偶腐蚀倾向,H62黄铜作为阳极腐蚀速率加快,HAl67-2. 5铝黄铜作为阴极腐蚀速率减小。Corrosion and galvanic corrosion behaviors of HAl67-2.5 and H62 marine copper alloys were systemically investigated through electrochemical analysis,immersion test in artificial sea water and galvanic corrosion experiment.The results showed that the electrochemical corrosion properties of the two polished copper alloys were similar.The corrosion rate of the HAl67-2.5 alloy was significantly lower than that of the H62 alloy in artificial sea water,and both of the alloys were sensitive to crivice corrosion.Moreover,galvanic corrosion occured when the two copper alloys connected to each other in corrosive medium,resulting in an accelerated corrosion of H62 alloy acted as the anode and a decreased corrosion rate of HAl67-2.5 alloy as the cathode.

关 键 词：电化学 人造海水浸泡 缝隙腐蚀 电偶腐蚀 

分 类 号：TG178[金属学及工艺—金属表面处理]