X80管线钢在鄯善土壤模拟溶液中的腐蚀行为

采用失重法、电化学测试、SEM、EDS等方法,研究了X80管线钢在鄯善土壤模拟溶液中的腐蚀行为。结果表明:X80钢在3个测试点模拟土壤溶液中以全面腐蚀为主,局部位置发生点蚀;在不同模拟溶液中的腐蚀速率大小依次为AN000>AN065>AN016;随着浸泡时间的增加,Ca2+吸附在X80钢表面并形成Ca的产物层,有效地减缓了X80钢在AN016模拟溶液中的腐蚀。在含盐量较高的土壤环境中,富集在钢基表面的结晶盐对钢的腐蚀具有一定的减缓作用。

Corrosion Behaviors of X80 Pipeline Steel in Shan-Shan Simulated Soil Solution

Corrosion characteristics of X80 pipeline steel in simulated solution of soil that collected from the Shan-shan area, in Xinjiang province were investigated by weight loss method, electrochemical measurement, scanning electron microscopy （SEM） and energy dispersive spectrometer （EDS）. The results showed uniform corrosion were happened on X80 steel in the three kinds of simulated soil solution. The rank- ing of corrosion rate of X80 steel in simulated soil solution was AN000 〉 AN065 〉 AN016. With the increas- ing of immersion time, absorbed layers of Ca2 ＋ were formed on X80 steel, which could provide effective cor- rosion protection for X80 steel in AN016 simulated solution. The deposited crystal salt on the surface of steel could inhibit the corrosion of pipeline steel in high salt content of soil.