期刊文献+

滨海盐土中典型供水管材腐蚀机理的土壤加速腐蚀研究

Corrosion Mechanism of Typical Water Supply Pipes in a Simulated Coastal Saline Soil Environment
分享 导出
摘要 基于土壤加速腐蚀实验,采用失重法和电化学测试手段研究了滨海盐土中球墨铸铁、灰口铸铁和碳钢3种典型供水管材的腐蚀规律、腐蚀层结构变化以及腐蚀的阴阳极反应动力学过程。结果表明:3种材质在滨海盐土中的腐蚀行为规律一致。腐蚀主要分为点蚀诱导期、点蚀发展期和稳定腐蚀期3各阶段;腐蚀初期和中期主要受电荷传递控制,且随着腐蚀的进行,电荷传递电阻快速上升;腐蚀稳定期,氧的扩散成为了腐蚀的控制步骤。3种材质腐蚀的极化曲线均出现明显的阴极扩散和阳极活化双重控制的现象,其中阴极扩散控制作用更为明显。 A laboratory accelerated test set-up was built to simulate the environment of the coastal saline soils at Tianjin coastal area. Corrosion performance of three typical materials for water supply pipes such as ductile iron, grey cast iron and carbon steel, was assessed by means of weight loss method and electrochemical measurement. The main conclusions are as follows: the three materials present more or less the same corrosion tendency in the test environment. The corrosion process can be differentiated into three stages: pitting induction stage, pitting developmental stage, and stable corrosion stage. The charge transfer was the control step in the initial- and middle-stage of corrosion, while the charge transfer resistance rose rapidly as the corrosion proceeded, however, the oxygen diffusion became the controlling step for the stable corrosion stage. The polarization curves of three materials showed obvious double control of cathodic diffusion and anodic activation, and the cathode diffusion control was more obvious.
作者 田一梅 刘春彤 郭浩 裴亮 Yimei TIAN;Chuntong LIU;Hao GUO;Liang PEI(School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China;Tianjin Tianbao Municipal Co. Ltd, Tianjin 300451, China)
出处 《腐蚀科学与防护技术》 CAS CSCD 北大核心 2019年第2期181-189,共9页 Corrosion Science and Protection Technology
基金 国家重点研发计划(2016YFC0802400).
关键词 土壤腐蚀 滨海盐土 腐蚀机理 球墨铸铁 灰口铸铁 碳钢 加速腐蚀 soil corrosion coastal saline soil corrosion mechanism ductile iron grey cast iron carbon steel accelerated corrosion
作者简介 田一梅,女,1959年生,博士,教授;通讯作者:郭浩,E-mail: tjuguohao@163.com,研究方向为供水管道腐蚀与防护.
  • 相关文献
投稿分析

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部 意见反馈