INFLUENCE OF THE MICROSTRUCTURE OF Cu-Ni ALLOY ON ITS CORROSION RESISTANCE

作     者：Zhu Xiaolong 

作者机构：General Research Institute for Nonferrous MetalsBeijing 100088China 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：1992年第2卷第4期

页      面：51-55页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by China National Natural Science Foundation 

主　　题：Cu-Ni alloy microstructure corrosion resistance seawater corrosion potential corrosion product film 

摘      要：The microstructures of two kinds of Cu-Ni alloys were observed by *** results show that one of the alloys is a homogeneous solid *** other contains discontinuous precipitates at some grain boundaries,and the precipitate is a phase rich in *** monitoring the corrosion potential(E_(con))in artifical seawater and exposure to natural seawater for a long time,it is found that the E_(con)of the former alloy steadily decreases,while the E_(con)of the latter decreases a little and fluctuates,and the corrosion rate of the former is clearly lower than that of the *** of SEM and EDX show that the corrosion product film of the former is thin,uniform,compact and rich in nickel,and the film of the latter is thick,loose and covered with numerous *** serious intergranular corrosion occurs in the underlying substrate of the *** author proposes that the intergraular corrosion results from preferential dissolution of discontinuous precipitates at grain *** addition,the protective characteristics of corrosion product films are related not only to the enrichment of nickel but also to their compactness.