摘要
利用失重法和扫描电镜研究了CO_2与嗜热SRB共存条件下X60钢在海底污泥和污水中的腐蚀行为.结果表明:CO_2饱和条件下,随着温度的升高,污泥和污水中腐蚀速率均增加,且含SRB的污泥和污水中X60钢的腐蚀速率均大于不含SRB的腐蚀速率,SEM观察表明,X60钢遭受的破坏以点蚀为主;随着CO_2分压的增大,X60钢的腐蚀速率增大,且污泥中腐蚀速率大于污水中腐蚀速率.
Corrosion behavior of X60 steel in CO_2 and thermophile sulfate-reducing bacteria （SRB） coexisted sludge and sewage,a submarine pipeline encountered environment,were studied by using weight-loss method and scanning electron microscopy（SEM）.The results showed that with the increase of temperature,corrosion rate of X60 steel in sludge and sewage saturated with CO_2 increased,and corrosion rate in CO_2-saturated sludge and sewage with SRB was higher than that without SRB.The morphology of corroded coupon showed characteristics of pitting corrosion.The corrosion rate increased with the increasing CO_2 partial pressure at static state, and the corrosion rate in sludge was always higher than that in sewage;moreover,the corrosion rate increased quickly with the rising CO_2 partial pressure at dynamic state.
出处
《腐蚀科学与防护技术》
CAS
CSCD
北大核心
2012年第2期107-112,共6页
Corrosion Science and Protection Technology
基金
中海油重大科技攻关项目(CJSH09Z0026)
国家自然科学基金项目(51171067)资助
关键词
硫酸盐还原菌
二氧化碳
腐蚀
X60钢
sulfate reducing bacteria
carbon dioxide
corrosion
X60 steel
