动态载荷下LY12CZ的力学化学行为研究  

EFFECT OF DYNAMIC LOAD ON ELECTROCHEMICAL BEHAVIOR OF LY12CZ

作　　者：饶思贤[1] 王景茹[2] 朱立群[2] 张峥[2] 钟群鹏[2] 张天鹏[3] 

机构地区：[1]安徽工业大学机械工程学院,马鞍山243002 [2]北京航空航天大学材料科学与工程学院,北京100083 [3]武汉材料保护研究所,武汉435400

出　　处：《腐蚀科学与防护技术》2009年第1期24-27,共4页Corrosion Science and Protection Technology

摘　　要：应用动应变电极技术研究了慢拉伸状态下LY12CZ铝合金在3%NaC l溶液中的力学化学行为,考察了在慢拉伸状态下应变幅和应变速率对LY12CZ在3%NaC l水溶液中的自腐蚀电位和瞬间腐蚀电流的影响规律,并且根据腐蚀电流的变化来阐述力学化学效应的大小.结果表明,LY12CZ铝合金在慢拉伸状态下力学化学效应的大小取决于应变幅、应变速率等因素.Strain electrode technique is used to investigate the mechano-chemical behavior of LY12CZ a- luminum alloy in 3% NaCl aqueous solution by slow strain rate test, the effect of strain amplitude and strain rate on the corrosion potential and transient corrosion current density of LY12CZ strain electrode is investigated, meanwhile the mechanism of crack initiation induced by corrosion is also discussed through the variation of transient current. Experimental results show that the extent of mechano-chemical effect under slow strain rate for LY12CZ aluminum alloy depends on the factors such as strain amplitude and strain rate.

关 键 词：应变电极 慢拉伸 力学化学效应 LY12CZ铝合金 

分 类 号：TG172.9[金属学及工艺—金属表面处理]