论文部分内容阅读
通过电化学阻抗(EIS)、极化曲线、扫描电镜(SEM)、能谱分析(EDS)和X射线衍射(XRD)等技术对接地极Q235碳钢材料在含不同盐分的上海地区土壤中的腐蚀行为进行了研究。结果表明,在不同盐分土壤条件下,Q235碳钢的阻抗均随着浸泡时间的延长出现先升高后平稳的趋势,腐蚀速率随盐分含量增大而增大。由于沿海土壤的侵蚀性阴离子含量较高,使得所产生的锈层失去保护性。Q235碳钢腐蚀主要以全面腐蚀为主,还伴有微生物腐蚀现象,腐蚀产物膜主要由Fe2O3组成。根据耐腐蚀性能评价标准,接地极碳钢材料在上海土壤环境中的耐腐蚀性能为良。
The Q235 carbon steel in the soils with different salt content in the soil of Shanghai area was characterized by EIS, polarization curve, SEM, EDS and XRD. Corrosion behavior was studied. The results showed that the resistance of Q235 carbon steel increased firstly and then stabilized with the increase of soaking time under different salt and soil conditions, and the corrosion rate increased with the increase of salt content. Due to the high content of aggressive anions in coastal soils, the resulting rust layer loses its protectiveness. The corrosion of Q235 carbon steel is dominated by total corrosion, accompanied by microbial corrosion, and the corrosion products mainly consist of Fe2O3. According to the evaluation standard of corrosion resistance, the corrosion resistance of grounding carbon steel in Shanghai soil environment is good.