摘要
用恒载荷和恒位移试样分别研究了预蠕变对奥氏体不锈钢在成膜(42%MgCl_2)和不成膜(0.5mol/L HCl+0.5mol/L NaCl)溶液,以及黄铜在氨水溶液中应力腐蚀的影响结果表明,如用恒载荷试样,则无论是不锈钢还是黄铜,预蠕变对应力腐蚀断裂时间和门槛值均没有影响;如用恒位移试样,则预蠕变能使不锈钢和黄铜应力腐蚀门槛值成倍提高黄铜在氨水中加载阴极保护足够长时间后能抑制随后开路条件下的应力腐蚀,这归因于阴极极化改变溶液成分和pH值。
Effect of pre-creep on stress corrosion cracking (SCC) of austenitic stainlesssteel in the film-forming solution (42% MgCl_2 ) and non-film-forming solution (0.5mol/LHCl+0.5mol / L NaCl), and brass in NH_4OH solution was investigated by using constantload and constant deflection specimens. No matter whether austenitic stainless steel or brass.pre-creep had no effect on failure time and threshold stress intensity of SCC if the constantload specimen was used. But by using constantly deflected specimen, pre-creep could greatlyincrease the threshold stress intensity of SCC for both austenitic stainless steel and brass.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1993年第5期B224-B230,共7页
Acta Metallurgica Sinica
基金
国家自然科学基金
关键词
预蠕变
应力腐蚀
黄铜
不锈钢
pre-creep
stress corrosion cracking
cathodic protection
steel 304
brass
