材料工程Issue(4)：62-67,6.
腐蚀产物膜对X80钢在库尔勒土壤模拟溶液中腐蚀行为的影响
Effect of Corrosion Product Films on Corrosion Behavior of X80 Pipeline Steel in Ku'erle Soil Simulated Solution
摘要
Abstract
The corrosion product films were formed on the surface of X80 pipeline steel immersed in Ku'erle soil simulated solution for 1 month, and the micrographs, compositions were observed and tested using scanning electron microscopy (SEM) and X-ray diffraction (XRD), respectively. The effect of corrosion product films on the corrosion resistance of X80 steel in simulated solution was in-vestigated by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) meas-urements. The results showed that the corrosion product films accelerated the cathodic reduction processes, which were translated from activation control into diffusion control. The corrosion product is mainly composed of inner Fe3O4 layer and outer Fe2O3, Fe(OH)3 and FeO(OH) layer. The outer layer, which is loose and caducous, does not protect X80 from corrosion. There are some microcracks and microvoids in the inner corrosion product, which is compact, and these defects increase the effective area of cathodic reduction, reduce the transfer resistance of charge ions, promote the formation of corrosion microcell, thus, X80 steel with corrosion product films exhibits a higher corrosion rate than bare steel in Ku'erle soil simulated solution.关键词
X80管线钢/盐渍土壤/腐蚀产物膜/耐蚀性Key words
X80 pipeline steel/salt lake soil/corrosion product film/corrosion resistance分类
矿业与冶金引用本文复制引用
梁平,张云霞,胡传顺..腐蚀产物膜对X80钢在库尔勒土壤模拟溶液中腐蚀行为的影响[J].材料工程,2012,(4):62-67,6.基金项目
国家自然科学青年科学基金资助项目(50801036) （50801036）
