摘要
采用旋转圆桶冲刷腐蚀试验机,利用多种电化学测试手段,结合表面分析、失重测量研究了B10铜镍合金流动海水冲刷腐蚀、成膜过程和膜层的电化学信息,探讨了流速及腐蚀时间对成膜过程的影响.结果表明,B10合金在0、1、2、3、3.6、4m/s的试验流速海水中的腐蚀速度随着腐蚀时间的变化规律相似,在静止和流动海水中都会生成内、外双层保护性的腐蚀产物膜,随着流速增加,产物膜因受流体力学作用增大而被冲刷削薄;腐蚀反应阳极区随海水流速和时间变化较大,腐蚀受阳极反应和传质过程控制.
The electrochemical corrosion behavior of 90/10 copper-nickel alloy after being erosion-corrosion tested in flowing seawater has been studied. From an analysis of the electrochemical behavior of the alloy, it is clear that the variation of corrosion rate with time are similar both in quiescent and flowing seawater. There is a double oxide film formed on the surface of the material. The inner oxide film, which primarily consisted of cuprous oxide （ Cu2O）, is important for the protection of the material. It can be concluded that the rate of charge and mass transfer of the anodic reaction is the determining step of the corrosion reaction.
出处
《腐蚀科学与防护技术》
CAS
CSCD
北大核心
2008年第1期12-18,共7页
Corrosion Science and Protection Technology
基金
基础科研环境腐蚀课题(H082006A003)
关键词
B10铜镍合金
流动海水
冲刷腐蚀
电化学
90/10 copper-nickel alloy
flowing seawater
erosion corrosion
electrochemistry
