Alloy corrosion

被引:144
作者
Newman, RC
Corcoran, SG
Erlebacher, J
Aziz, MJ
Sieradzki, K
机构
关键词
D O I
10.1557/S0883769400052660
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Alloy corrosion is a field of scientific study that combines electrochemical kinetics with aspects of the morphological evolution of surfaces. The basic alloy corrosion process is de-alloying, where a significant difference in the equilibrium metal/metal-ion electrode potentials for two metals occurs. In alloy systems where the ambient temperature corresponds to a small fraction of the homologous melting temperature, site-percolation thresholds set a lower bound on the parting limit. The parting limit represents the critical content of reactive alloy components that is required to allow de-alloying at an arbitrarily high anodic potential. Another field of alloy corrosion is passivation, where sharp compositional threshold behavior is observed.
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页码:24 / 28
页数:5
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