摘要
黄铜在氨水中腐蚀或应力腐蚀时表面形成脱锌层,它会产生一个附加拉应力.用挠度法和流变应力差值法测量了不同氢浓度试样的脱锌层所引起的附加应力.也研究了不同氢浓度试样在氨水中的应力腐蚀敏感性.慢应变速率拉伸表明,黄铜不显示氢脆,但在氨水中显示极高的应力腐蚀敏感性（Iscc）,它随试样中氢浓度（C0）升高而升高.脱锌层拉应力σp也随试样中氢浓度的升高而升高.实验表明,应力腐蚀敏感性随氢浓度的变化和脱锌层拉应力随氢浓度的变化相一致.
Dezincification layer formed on brass during corrosion or stress corrosion cracking (SCC) in ammonia solution induced an additive stress. Effect of hydrogen on the dezincification layer-induced stress of brass in the ammonia solution, which has been measured using the deflection method and flowing stress difference method, and susceptibility to SCC, which was measured using slow strain rate test, have been studied. The results showed that both the dezincification layer-induced stress and susceptibility to SCC increased with increasing hydrogen concentration in specimen. This implies that hydrogen-enhanced stress induced by dezincification layer is consistence with hydrogen-enhanced susceptibility to SCC of brass in the ammonia solution.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2002年第8期853-856,共4页
Acta Metallurgica Sinica
基金
国家自然科学基金项目 50071010以
国家重点基础研究规划项目 G19990650资助
关键词
黄铜
氢
应力腐蚀
脱锌层
brass
hydrogen
stress corrosion cracking (SCC)
dezincification layer
