压力容器
壓力容器
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2009年
7期
5-10
,共6页
奥氏体不锈钢%氯离子%慢应变速率%应力腐蚀开裂
奧氏體不鏽鋼%氯離子%慢應變速率%應力腐蝕開裂
오씨체불수강%록리자%만응변속솔%응력부식개렬
Austenitic stainless steel%chloride ion%slow strain rate%stress corrosion crack
采用慢应变速率拉伸实验研究了304奥氏体不锈钢在60℃时,不同氢离子浓度的NaCI溶液中的应力腐蚀性能.实验结果表明,随着氢离子浓度的增大,304不锈钢的应力腐蚀敏感性增强,但是当氢离子浓度达到一定程度时,应力腐蚀敏感性显著下降,这是由于当氢离子浓度过大时,均匀腐蚀的作用优先于应力腐蚀作用成为主导.在这种阳极溶解型应力腐蚀开裂中,氢和应力的交互作用增加了304不锈钢在酸性氯离子溶液中的应力腐蚀敏感性.
採用慢應變速率拉伸實驗研究瞭304奧氏體不鏽鋼在60℃時,不同氫離子濃度的NaCI溶液中的應力腐蝕性能.實驗結果錶明,隨著氫離子濃度的增大,304不鏽鋼的應力腐蝕敏感性增彊,但是噹氫離子濃度達到一定程度時,應力腐蝕敏感性顯著下降,這是由于噹氫離子濃度過大時,均勻腐蝕的作用優先于應力腐蝕作用成為主導.在這種暘極溶解型應力腐蝕開裂中,氫和應力的交互作用增加瞭304不鏽鋼在痠性氯離子溶液中的應力腐蝕敏感性.
채용만응변속솔랍신실험연구료304오씨체불수강재60℃시,불동경리자농도적NaCI용액중적응력부식성능.실험결과표명,수착경리자농도적증대,304불수강적응력부식민감성증강,단시당경리자농도체도일정정도시,응력부식민감성현저하강,저시유우당경리자농도과대시,균균부식적작용우선우응력부식작용성위주도.재저충양겁용해형응력부식개렬중,경화응력적교호작용증가료304불수강재산성록리자용액중적응력부식민감성.
Slow strain rate tests were adopted to study stress corrosion properties of 304 austenitie stainless steel in the environment of different concentration of acid NaCI solution at the temperature of 60℃. Test result showed that with the increasing of H<'+ concentration, stress corrosion cracking sensitivity increased, however, when H<'+ concentration reached a critical value, stress corrosion cracking sensitivity decreased drastically due to general corrosion. Although the mechanism of stress corrosion cracking for 304 stainless steel in acid NaCI solution is anodic solution, interaction of hydrogen and stress increased stress corrosion cracking sensitivity in the environment of acid NaCI solution.
