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.
出处
《腐蚀科学与防护技术》
CAS
CSCD
北大核心
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
