材料工程Issue(1)：87-91,5.
温度对管线钢H2S/CO2腐蚀行为的影响
Effect of Temperature on H2S/CO2 Corrosion Behavior of Pipeline Steel
摘要
Abstract
Flowing solution environments containing H2S/CO2 were simulated in a high temperature and high pressure autoclave. Corrosion behavior of API-X60 pipeline steels was investigated with scanning electron microscopy (SEM) and X-ray diffraction methodology (XRD). Effects of temperature on corrosion rate and products were discussed. The results show that corrosion rate of X60 steel increases at the beginning and then decreases with temperature increasing, and localized corrosion turns into general corrosion obviously, but pitting is observed at high temperature. Mackinawite (FeS1-x) and FeS composite form as corrosion product in low-temperature condition, with temperature increasing the corrosion products were dominated by lamellar-type Mackinawite crystal and associated with a small amount of Pyrrhotite (Fe1-xS) crystal. However, Pyrrhotite crystal becomes more dominated at higher temperature region. Poor adhesion of corrosion scale leads to a lower covering rate at low temperature. Cathodic effects of scale promote the localized corrosion and a faster anode reaction rate and rapid development of pitting will be achieved without blocked effect.关键词
X60/H2S/CO2腐蚀/温度/点蚀Key words
X60/ H2S/CO2 corrosion/ temperature/ pitting分类
矿业与冶金引用本文复制引用
杨建炜,章军,曹建平,陈晨,张雷,丁金慧,路民旭..温度对管线钢H2S/CO2腐蚀行为的影响[J].材料工程,2011,(1):87-91,5.基金项目
国家自然科学基金资助项目(50701007) （50701007）
