用于散热器的冷轧钢板耐蚀性

Corrosion Behavior of Cold Rolled Carbon Steel Used for Radiator Manufacture

摘要: 利用化学浸泡及电化学方法研究了4种钢制散热器材质在不同含氧量和氯离子浓度下的腐蚀速度及耐蚀性,并用X射线衍射对锈蚀物进行了结构分析。实验结果表明,钢材腐蚀速度主要取决于供热水系统中的溶氧量。在脱氧条件下则形成Fe₃O₄保护膜,此时氯离子将加速材料的腐蚀。腐蚀极化电阻则随残余应力的增加而下降。

Abstract: Corrosion rate and corrosion behavior of four cold rolled carbon steel used for radiator manufacture have been studied in different dissolved oxygen and chloric ion concentration by weight loss test and electrochemical measurement.The structure and composition of the rust layer were examined by X-ray diffraction and scanning electron microscopy.The results shown that corrosion rate is mainly dependent on oxygen concentration in heating water system,after oxygen in solution has been removed,the rust consists of magnetite Fe₃O₄ and chloric ion increases corrosion of material.Corrosion resistance decreases with residual/stress.