铸造铜合金冲刷腐蚀及机理研究  

Mechanism of Erosion Corrosion of As-cast Copper Alloys

作　　者：杨刚毅 汪冰峰[1] 刘源 姜锋[1] 叶鹏程 YANG Gang-yi;WANG Bing-feng;LIU Yuan;JIANG Feng;YE Peng-cheng(School of Materials Science and Engineering, Central South University, Changsha 410083, Hunan, China)

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083

出　　处：《矿冶工程》2019年第1期125-127,131,共4页Mining and Metallurgical Engineering

基　　金：湖南省战略性新型产业重大科技成果转换类项目(2016GK4019)

摘　　要：模拟海水环境,对硅黄铜进行了冲刷腐蚀模拟实验和电化学腐蚀实验,借助SEM与XRD等手段分析了腐蚀现象,研究冲刷腐蚀机理。结果表明:铸造铜合金在冲刷腐蚀过程中腐蚀产物与电化学腐蚀相同;在未形成完整的钝化膜之前,铜合金腐蚀速率快;海水冲刷作用使材料表面处于钝化膜不断破坏与形成的循环过程中。A corrosion experiment and an electrochemical corrosion test were conducted for silicon brass in the simulated seawater conditions and the corrosion phenomena were investigated by SEM and XRD for exploring the mechanism of erosion corrosion. The results showed that the corrosion products after the erosion corrosion of the cast copper alloy were the same as that from the electrochemical corrosion. The corrosion of the copper alloy was faster before completely forming the passive film, and due to the continuous destruction of the passive film by the seawater erosion process, the surface remained in a cyclic process of destruction and formation of a passive film.

关 键 词：硅黄铜 电化学腐蚀 冲刷腐蚀 海水腐蚀 动态腐蚀 

分 类 号：TG146[一般工业技术—材料科学与工程]