摘要
基于目前电网输变电设备腐蚀严重的实际情况,选取四川省乐山市城市、化工工业及陶瓷工业三种典型大气污染环境,通过1年期的暴露试验对Q235碳钢材料的大气腐蚀行为进行研究.利用失重法测定了Q235碳钢材料在不同环境下的大气腐蚀速率以及大气腐蚀等级.通过宏观形貌、扫描电子显微镜(SEM)、能谱分析(EDS)、X射线衍射(XRD)、电化学测试等方法深入研究了Q235碳钢材料在四川乐山不同大气污染环境中的腐蚀行为.结果表明,四川乐山不同大气环境对Q235碳钢的腐蚀影响由重到轻依次为陶瓷工业环境、化工工业环境及城市环境.腐蚀速率越高,腐蚀产物颜色越深且越致密,尖锐程度越突出;腐蚀产物主要成分均为α-FeOOH、γ-FeOOH和Fe3O4;Q235碳钢表面的锈层不具有保护基体的作用,反而会加快基体的腐蚀.
Based on the severe corrosion of power transmission and transformation equipment in the power grid,three typical atmospheric pollution environments were selected to study the atmospheric corrosion behavior of Q235 carbon steel material by one-year exposure test,including Leshan city,chemical industry and ceramic industry in Sichuan province.The atmospheric corrosion rates and atmospheric corrosion grades of Q235 carbon steel in different environments were measured by weight-loss method.The corrosion behavior of Q235 carbon steel in Leshan was studied by means of macroscopic morphology,scanning electron microscope(SEM),energy spectrum analysis(EDS),X-ray diffraction(XRD)and electrochemical test.The results showed that the corrosion effect of Q235 carbon steel in Leshan was different.Ceramic industrial environment had the highest effect,followed by chemical industrial environment and the urban environment.The higher the corrosion rate is,the darker and denser the color of the corrosion products,and the more prominent of the sharpness.The main components of the corrosion products wereα-FeOOH,γ-FeOOH and Fe3O4.The rust layer on the surface of Q235 carbon steel did not protect the matrix;on the contrary,it accelerated the corrosion of the matrix.
作者
田倩倩
海潮
王志高
王乃会
兰新生
杜翠薇
TIAN Qian-qian;HAI Chao;WANG Zhi-gao;WANG Nai-hui;LAN Xin-sheng;DU Cui-wei(State Grid Sichuan Electric Power Research Institute,Chengdu 610041,China;Corrosion and Protection Center,Beijing University of Science and Technology,Beijing 100083,China;State Grid Sichuan Electric Power Company Leshan Power Supply Company,Leshan 614000,China)
出处
《西南民族大学学报(自然科学版)》
CAS
2020年第5期478-486,共9页
Journal of Southwest Minzu University(Natural Science Edition)
基金
国家自然科学基金青年科学基金项目(21804095)
国网四川省电力公司科技项目(521997160013)。
关键词
Q235碳钢
大气污染
大气腐蚀行为
大气腐蚀等级
Q235 carbon steel
air pollution
atmospheric corrosion behavior
atmospheric corrosion grade