一种新型螺纹钢低温缓蚀淬火剂

A New Type of Low Temperature Corrosion Inhibition Quenched Agent for Rebar

为了提高螺纹钢的耐腐蚀性能,研制了一种新型低温缓蚀淬火剂。采用大气暴露腐蚀(AE)和干湿交替腐蚀(CCT)研究了淬火螺纹钢的耐腐蚀性能,采用电化学测试(ET)、FTIR、SEM和XRD探讨了耐腐蚀机理。结果表明,经缓蚀淬火剂淬火处理后螺纹钢的表面生成了约10μm致密钝化膜;AE腐蚀产物由α-Fe2O3、γ-Fe2O3、α-FeOOH及硅酸铁化合物组成,组成成分未变但其相对含量发生了变化;缓蚀淬火处理使腐蚀反应的活化能由73.8kJ/mol提高到了111.3kJ/mol。螺纹钢的耐腐蚀性能得到了显著提高。

To improve the corrosion resistance of rebar,a new type of corrosion inhibition quenched agent was prepared.The corrosion resistances of quenching rebar were researched by atmospheric exposure test（AE）and wet/dry cyclic accelerated corrosion test（CCT）.The inhibition mechanism was also investigated by electrochemical test,FTIR,SEM and XRD.The results showed that the dense passive film（thickness about 10μm）was appeared on the surface of the rebar;the composition of the AE products consisted ofα-Fe2O3,γ-Fe2O3,α-FeOOH and iron silicate,and the composition was unchanged but the relative content of each composition was changed;the activation energy of the corrosion reaction increased from 73.8kJ/mol to 111.3kJ/mol after quenched with the obtained agent.The corrosion resistance of rebar was significantly enhanced.