A3钢在模拟酸雨环境中腐蚀行为的研究  

Study on Corrosion Behavior of A3 Steel in Simulated Acid Rain

作　　者：黄文章[1] 陈文[2] 郭建平[3] 李丹[1] 向斌[2] 

机构地区：[1]重庆科技学院化学化工学院 [2]重庆大学化学化工学院 [3]中国石油西南油气田公司天然气研究院

出　　处：《石油与天然气化工》2009年第4期335-338,共4页Chemical engineering of oil & gas

基　　金：重庆市自然科学基金(No.CSTC-2004BA4024)项目

摘　　要：为了研究和探索A3钢在自然酸雨环境中的腐蚀特点,通过线性极化法和交流阻抗法对A3钢在模拟酸雨环境下的腐蚀行为进行初步研究,并针对不同酸度、不同离子浓度和不同浸泡时间下的腐蚀结果进行了对比。实验研究表明,酸度的增加提高了金属腐蚀速率,SO24-和Cl-在酸雨溶液中对金属阳极溶解起到加速作用,随着浸泡时间的延长,金属表面的腐蚀层发生变化,金属的腐蚀速率相应经过了增→减→增的过程。In order to investigate the corrosion behavior of A3 steel under natural acid rain,linear polarization and AC impedance were used to study corrosion behavior of A3 steel in a simulated acid rain.The effect of different acidity,ion concentration and immersion time on the corrosion were compared.The results showed that the increase in acidity raised the corrosion rate of metal;meanwhile SO2-4 and Cl-in acid solution accelerated the anodic dissolution of metal.With the extension of immersion time,the corrosion layer on the surface of metal was changed,and the corrosion rate changed as follows:increased→reduced→increased.

关 键 词：酸雨 极化 交流阻抗 腐蚀速率 

分 类 号：TG171[金属学及工艺—金属表面处理]