摘要
Abstract
In order to study the corrosion situation of 20 steel in sewage containing high H2S,it analyzed the corrosion factors of 20 steel from several aspects,such as material,water temperature,dissolved oxygen and the change of water pH etc. The experimental results indicated that the metallographic structure of 20 steel mainly contains bulky or lamellar pearlite and ferrite,meanwhile, there exits segregation and inclusions in its structure. At 60 ℃,the corrosion is serious,it presents the characteristics of scaling before corrosion. The presence of dissolved oxygen in water prevents the generation of passive film , accelerating corrosion,with the pH value decreasing in a small range. This also can make the corrosion of 20 steel increase obviously.关键词
气田污水/20钢/H2S/腐蚀Key words
gas field sewage/20 Steel/H2S/corrosion分类
矿业与冶金
