1Cr18Ni9Ti不锈钢在土壤中腐蚀规律研究

CORROSION OF ICr18Ni9Ti STAINLESS STEEL IN SOILS

然埋设试件的方法，研究了 １Ｃｒ１８Ｎｉ９Ｔｉ不锈钢在酸性、中性及碱性上中埋设 １， ３， ５年 后的腐蚀特征.结果表明，不锈钢在酸性及中性土壤中腐蚀轻微，在含盐量较高的碱性土壤中腐蚀比中酸 性土壤严重， 且出现点蚀现象；土壤中的 Ｃｌ－及 ＳＯ２－是影响不锈钢腐蚀的最主要因素，随着 Ｃｌ－及 ＳＯ２的增多，不锈钢的腐蚀失重增大；自然腐蚀电位也反映不锈钢在土壤中的腐蚀状态，腐蚀电位为正， 腐蚀轻微，腐蚀电位越负。

Corrosion behavior of ICr18Ni9Ti in soils was studied.The results showed that corrosion of stainless steel was due to the total contents of C1- and SO2- in soils, A good correlation between the weight loss of ICr18Ni9Ti and the total contents of C1- and SO2- in soils was reported. Corrosion potential were the most important factor determining corrosion rate of stainless steel in soils. Some pitting corrosion of ICr18Ni9Ti was found in Dagang alkaline soil.