ROLE OF THE TARNISH FILM IN THE STRESS-CORROSION CRACK-PROPAGATION PROCESS IN ALPHA-BRASS IN NEUTRAL AMMONIACAL SOLUTIONS

被引：26

作者：

KERMANI, M

SCULLY, JC

机构：

[1] Department of Metallurgy, University of Leeds, Leeds

来源：

CORROSION SCIENCE | 1979年 / 19卷 / 02期

关键词：

D O I：

10.1016/0010-938X(79)90044-1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In solutions of pH 6.8 containing 1.5M ammonia and 0.04M total copper, stress corrosion crack arrest can occur in α-brass specimens because of tarnish film formation. Removal of the film by inhibited acid restores crack propagation in the same solution. Alterations in the ammonia and copper content and solution pH all lead to results that emphasise the protective role of the tarnish film. Various proportions of transgranular cracking were seen in all the solutions employed. In high K regions of the fracture (111) planes were identified and in low K regions planes mutually inclined at 90° were observed. The important factor determining both crack velocity and crack arrest is the ratio R consisting of the tarnish film formation rate/crack tip strain-rate. © 1979.

引用

页码：111 / &

共 27 条

[1]

BEAVERS JA, 1977, THESIS U ILLINOIS

[2] AMMONIACAL STRESS CORROSION CRACKING OF ALPHA-BRASS [J].