模拟污染潮湿大气环境下LY12CZ、LC4CS铝合金腐蚀行为研究  

CORROSION BEHAVIORS OF LY12CZ AND LC4CS ALUMINIUM ALLOYS IN SIMULATED ATMOSPHERE

作　　者：张正[1] 宋诗哲[1] 卢玉琢[1] 陶蕾[1] 吴钢[1] 

机构地区：[1]天津大学材料与科学工程学院,天津300072

出　　处：《中国腐蚀与防护学报》2007年第3期129-133,共5页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金重大项目(50499335)

摘　　要：建立了基于电化学噪声测试技术(EN)的铝合金大气腐蚀实时监检测方法.设计并制作了配套的电解池.运用所建立方法测试并计算得到了LY12CZ、LC4CS铝合金在pH值为中性恒温恒湿的模拟近海、海洋大气以及工业污染大气环境中的噪声电阻Rn和电位噪声功率密度谱高频线性部分斜率K,从腐蚀速度和腐蚀类型两方面研究了两种铝合金在模拟污染潮湿大气环境下的腐蚀行为,以及Cl-、NO3-和SO42-对铝合金大气腐蚀行为的影响和协同作用.A real -time monitor method based on electrochemical noise （EN） was set up to study the atmospheric corrosion of aluminium alloy. The electrolytic cell was designed and made accordingly. Inshore, oceanic atmosphere and contaminative industrial atmosphere with neutral pH value, constant temperature and humidity were simulated. Using the established method atmospheric corrosion of the aluminum alloys LY12CZ and Lcgcs was studied. The electrochemical noise resistance R. and the slopes K of the potential power density spectrum （PDS） were gotten in EN test. The corrosion behavior of the aluminium alloys in simulated atmosphere, and influence of Cl^-, NO^- 3 and SO^2- 4 in corrosion process of the aluminium alloys （ LY12CZ and LC4CS） were studied with corrosion rate and corrosion type.

关 键 词：LY12CZ LC4CS 电化学噪声 模拟大气 污染离子 

分 类 号：TG174.31[金属学及工艺—金属表面处理]