Q235钢在冀北地区的大气腐蚀行为  

Atmospheric Corrosion Behavior of Q235 Steel in Northern Hebei Region

作　　者：宋子博 王智春[1,2] 王建国 彭波[1,2] 张传正 SONG Zibo;WANG Zhichun;WANG Jianguo;PENG Bo;ZHANG Chuanzheng(North China Electric Power Research Institute Co.,Ltd.,Beijing 100045,China;State Grid Jibei Electric Power Research Institute,Beijing 100045,China)

机构地区：[1]华北电力科学研究院有限责任公司,北京100045 [2]国网冀北电力有限公司电力科学研究院,北京100045

出　　处：《机械工程材料》2021年第6期46-51,共6页Materials For Mechanical Engineering

基　　金：国网冀北电力有限公司电力科学研究院2018年自有资金科技项目(KJZ2018070)。

摘　　要：对Q235钢在冀北地区(唐山市、秦皇岛市、廊坊市、承德市和张家口市)进行暴露1 a的大气腐蚀试验,对比了Q235钢在不同城市的腐蚀速率,研究了5个城市中心位置(安各庄、天马、霸州、隆城、万全)大气环境中的Cl^(-)沉积率、SO_(2)含量及湿度对Q235钢腐蚀速率的影响,并观察了腐蚀产物形貌。结果表明:Q235钢的腐蚀速率从东南方向至西北方向逐渐降低;Cl^(-)沉积率较低,对腐蚀速率的影响较小,SO_(2)含量对腐蚀速率的影响大于Cl^(-)的,空气相对湿度的影响最大;Q235钢在安各庄站的腐蚀速率较快,表面腐蚀产物主要为对基体保护作用较小的片状γ-FeOOH,在霸州和天马站的腐蚀速率次之,腐蚀产物主要为团簇状α-FeOOH,在万全和隆城站的腐蚀速率较慢,表面腐蚀产物主要为棉絮状的α-FeOOH,对基体的保护作用较大。The atmospheric corrosion test was conducted on Q235 steel in northern Hebei region(Tangshan,Qinhuangdao,Langfang,Chengde,and Zhangjiakou city)for 1 a,and the corrosion rates of Q235 steel in different cities were compared.The effects of Cl^(-)deposition rate,SO_(2) content and humidity in the atmospheric environment at center positions of five cities(Angezhuang,Tianma,Bazhou,Longcheng,Wanquan)on the corrosion rate of Q235 steel were studied,and the morphology of the corrosion products was observed.The results show that the corrosion rate of Q235 steel decreased gradually from southeast to northwest.The effect of Cl^(-)on corrosion rate was relatively small because of the relatively low deposition rate.The influence of SO_(2) content on corrosion rate was greater than that of Cl^(-),and the influence of air relative humidity was the largest.The corrosion rate of Q235 steel at Angezhuang station was relatively fast,and the surface corrosion products were mainly lamellarγ-FeOOH,which had relatively small protective effect on the matrix.The corrosion rates at Bazhou and Tianma stations were the second,and the corrosion products were mainly cluster-shapedα-FeOOH.The corrosion rates at Wanquan and Longcheng stations were relatively slow,and the surface corrosion products were mainly cotton-flock-likeα-FeOOH,which had relatively large protective effect on the matrix.

关 键 词：大气腐蚀 Q235钢 腐蚀速率 冀北地区 

分 类 号：TG174.3[金属学及工艺—金属表面处理]