渗锌钢在4种典型土壤环境中的腐蚀行为

Corrosion Behavior of Sherardizing Steel in Different Soils at Four Typical Test Sites

在我国大港、鹰潭、格尔木、克拉玛依4个典型土壤中,将渗锌钢片埋藏2a,观察试样的宏观形貌和微观形貌,用XRD物相结构检测分析了锈层的主要成分,计算渗锌钢在各试验站的腐蚀速率,并采用电化学测试分析了锈层对腐蚀介质的阻挡能力。结果表明,渗锌钢在4个土壤实验站的腐蚀速率均比较大,2a后在鹰潭土壤中腐蚀速率最大,土壤的理化性能影响着渗锌钢腐蚀产物成分和相对含量。

The corrosion of sherardizing steel in soils at four test sites was studied by burying the steel specimens for 2a. The corrosion morphology of the buried steel specimens was observed by VHX-2000 microscope and the corrosion products were characterized by XRD. Electrochemical test is employed to assess the electrochemical impedance of corrosion products. The results showed that the corrosion rate of the sherardizing steel in the four soils was large. The maximum corrosion rate was detected for the sherardizing steel in the soil of test site at Yingtan district. The property of corrosion products was affected by physical-chemical parameters of soils.