Q235钢与X70钢在新加坡土壤环境中1年腐蚀行为研究  

Corrosion Behavior of Q235 and X70 Steels Buried in Soil at Singapore for One Year

作　　者：杜翠薇[1] 王胜荣[1] 刘智勇[1] 李晓刚[1] 朱敏[1] 李琼[1] 黄一中[2] 刘明[1] 

机构地区：[1]北京科技大学材料科学与工程学院腐蚀与防护中心,北京100083 [2]南洋理工大学材料科学与工程学院材料科学系,新加坡639798

出　　处：《腐蚀科学与防护技术》2015年第3期231-236,共6页Corrosion Science and Protection Technology

基　　金：国家高技术发展计划项目(2012AA040105)资助

摘　　要：通过土壤理化性质分析、现场埋样的腐蚀形貌观察、腐蚀产物的扫描电镜观察和X射线衍射分析以及腐蚀失重实验等分析手段,研究了国产X70钢和Q235钢在新加坡土壤中现场埋样1 a后的短期腐蚀行为特征。结果表明,新加坡土壤属于酸性土壤;埋样1 a后Q235钢平均腐蚀速率略大于X70钢,两种钢以局部腐蚀为主,Q235钢的局部腐蚀较严重;两种钢的腐蚀产物组成相似,均为Fe2O3,Fe3O4,Fe OOH和Fe OCl,腐蚀产物表面粗糙,存在裂纹与空隙,从而加速局部腐蚀的进行。The short-term corrosion behavior of X70 steel and Q235 steel buried for 1 a in soil of a select site at Singapore were investigated in terms of characterizing the corrosion products by means of scanning electron microscopy and X-ray diffraction, as well as the physical and chemical parameters of the soil, and measuring the corrosion mass lass. It was found that the soil at the select site was an acidic soil; where the average corrosion rate of Q235 steel was higher than that of X70steel; the two steels all suffered form local corrosion, while that of Q235 steel was more serious;the corrosion products of these two steels were similar and mainly composed of Fe2O3, Fe3O4,Fe OOH and Fe OCl, the surface of products were rough and there were some cracks in the products scale, which seemed harmful to its protectiveness.

关 键 词：X70钢 Q235钢 酸性土壤 土壤腐蚀 

分 类 号：TG172[金属学及工艺—金属表面处理]