摘要
The grain boundary structure of Cu alloy was observed and the characteristic of the boundaries was studied,including 70∶30 cupronickel and 70∶30 brass. The results show that in the case of the 70∶30 cupronickel thin platelets with nickel and iron enrichment in it precipitate intergranular so that the alloy was sensitive to seawater corrosion. In the case of 70∶30 brass the situation of grain boundary segregation of different inclusions made the corrosion resistance of the alloy even worse. All of those were discovered through the corrosion behavior of the two different copper alloys served in various environments. The experimental methods used here were, scanning electron microscopy(SEM), transmission electron microscopy(TEM) and energy dispersive of X ray(EDX). The intergranular corrosion morphologies of those copper alloys served in engineering or exposed to seawater for a long term were given.
The grain boundary structure of Cu alloy was observed and the characteristic of the boundaries was studied,including 70∶30 cupronickel and 70∶30 brass. The results show that in the case of the 70∶30 cupronickel thin platelets with nickel and iron enrichment in it precipitate intergranular so that the alloy was sensitive to seawater corrosion. In the case of 70∶30 brass the situation of grain boundary segregation of different inclusions made the corrosion resistance of the alloy even worse. All of those were discovered through the corrosion behavior of the two different copper alloys served in various environments. The experimental methods used here were, scanning electron microscopy(SEM), transmission electron microscopy(TEM) and energy dispersive of X ray(EDX). The intergranular corrosion morphologies of those copper alloys served in engineering or exposed to seawater for a long term were given.
基金
ThisworkwassupportedbytheNationalNaturalScienceFoundationofChinaandStateKeyLaboratoryforCorrosionandProtection
