中南大学学报（自然科学版）2013，Vol.44Issue(1)：424-430,7.
SO42-对X80管线钢在库尔勒土壤模拟溶液中腐蚀行为的影响
Effects of SO42-on corrosion behavior of X80 pipeline steel in simulated Ku'erle soil solution
摘要
Abstract
The effects of SO42- on corrosion behavior of X80 pipeline steel in simulated Ku'erle soil solution was investigated by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The corrosion morphologies were observed by metalloscope with different SO42- mass fractions. The results show that the polarization curves of X80 pipeline steel have typical characteristics of active dissolution in Ku'erle soil simulated solution. The corrosion rate of X80 steel first increases and then decrease with the increase of SO42- mass fraction. When the mass fraction of SO42- is 5%, there is a critical value on polarization resistance, and the corrosion behavior of X80 steel is the most serious at this time. When the mass fraction is 10%, there are only a few small corrosion pits on the surface of metal. The Cl- in the solution which is adsorbed on the surface of X80 steel can lead to metal corrosion autocatalytic process. The adsorption ability of SO42- is stronger than C1-, and so it is able to inhibit the corrosion behavior of X80 steel aroused from Cl- .关键词
X80管线钢/库尔勒土壤/SO42-/腐蚀行为Key words
X80 pipeline steel/ Ku'erle soil/ SO42-/ corrosion behavior分类
矿业与冶金引用本文复制引用
谢飞,吴明,陈旭,王丹,胡宗柳,刘勇峰..SO42-对X80管线钢在库尔勒土壤模拟溶液中腐蚀行为的影响[J].中南大学学报（自然科学版）,2013,44(1):424-430,7.基金项目
国家自然科学基金资助项目(50771053) （50771053）
