摘要
通过高压釜试验研究了20G钢在高含Cl-乙二醇溶液中的腐蚀行为,用能谱(EDS)及X射线光电子能谱(XPS)对腐蚀产物膜进行成分分析,试验结果表明:20G在乙二醇溶液中生成的钝化膜较薄,其主要成分为Fe2O3,FeOOH。在溶液中水的作用下,由于氧化膜溶解,形成阳离子层促使钝化膜形成。在闭塞区,当孔内溶解的电流密度大于溶解产物由孔内向孔外的传质速度,腐蚀性加强。
Corrosion behaviors of 20G steel was researched through autoclave experiment in high Cl- gly- col solution. Doing component analysis to corrosion film using EDS and XPS, the research results indicated that, a thinner inaction film of 20G steel which dominant component is Fe2 03, FeOOH was made. Passive film was formed by forming a cation layer as the oxide film pre - dissolved in solution under the action of the water. In block area, when the dissolved current density was more than mass transfer velocity of dissolved result from in the hole to out the hole, corrosive strengthen.
出处
《压力容器》
北大核心
2010年第2期19-23,共5页
Pressure Vessel Technology
