P110钢在不同温度含饱和H_2S/CO_2腐蚀溶液中的腐蚀行为  

Corrosion Behavior of P110Steel in Corrosion Solution with Saturated H_2S and CO_2 at Different Temperatures

作　　者：刘飞[1] 黄金营[1] 夏成宇[2] 周仕明[1] 邓天安 

机构地区：[1]中国石化石油工程技术研究院,北京100101 [2]长江大学机械工程学院,荆州434023 [3]中石化西南石油工程有限公司固井分公司,德阳610800

出　　处：《腐蚀与防护》2016年第6期481-483,489,共4页Corrosion & Protection

基　　金：国家重大科技专项(2011ZX05005-006);国家自然科学基金资助项目(51374218)

摘　　要：利用腐蚀失重试验,电化学试验和扫描电子显微镜等方法研究了不同温度下P110钢在含饱和H_2S/CO_2气体的5%NaCl溶液中的腐蚀行为。研究表明:随着温度的升高,P110钢的腐蚀速率呈现出了先增大后减小的规律;在含饱和H_2S/CO_2气体的5%NaCl溶液中,由于温度升高促进了点蚀的发生,在较高温度时形成全面腐蚀,但温度的升高导致H_2S、CO_2气体的溶解度降低,抑制了点蚀的发生,形成厚而致密的腐蚀产物膜,使腐蚀速率随温度升高而降低。The corrosion behavior of P110 steel in 5% NaCl solution with saturated H2S and CO2 gases was investigated at different temperatures by corrosion weight loss testing, electrochemical testing and scanning electron microscopy. The results show that the corrosion rate of P110 steel at different temperatures increased first and then decreased with the increase of temperature. In 5% NaCl solution with saturated HzS and CO2 gases, the increase of temperature would promote the pitting corrosion of P110 steel, which led to general corrosion at higher temperatures. But the solubility of Hz S and CO2 decreased with increasing temperature, which restrained pitting corrosion and led to the formation of thick and compact corrosion films, so the corrosion rate decreased.

关 键 词：硫化氢 二氧化碳 温度 腐蚀速率 腐蚀产物膜 

分 类 号：TG172.7[金属学及工艺—金属表面处理]