应用动电位扫描和电化学阻抗谱(EIS)技术研究了高铬含量对耐候钢电化学行为的影响.动电位扫描极化曲线结果表明,增大钢中铬质量分数可以提升耐候钢的自腐蚀电位E0,降低耐候钢腐蚀速率;电化学阻抗谱分析结果则显示高铬耐候钢具有较致密有效的腐蚀产物膜,抵御离子传导能力增强.
In order to study the influence of high Cr content on corrosion resistance of weathering steel,elec-trochemical tests were carried out. Firstly,polarization curves were obtained by potentiodynamic scanning meth-od. The results showed that E0(free corrosion potential) increased and corrosion rate decreased due to increas-ing the mass fraction of Cr. According to the analysis of EIS the weathering steel with high Cr content was cov-ered by a more compact and effective corrosion product film with higher resistance to ions migration.
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