材料期刊网

    采用实验室加速腐蚀实验并结合电化学实验技术对比研究了08MnNiVR和SS400普碳钢在模拟大气腐蚀环境条件下和在3.5%NaCl溶液中的腐蚀性能.结果表明：08MnNiVR在模拟大气腐蚀环境下的耐蚀性能明显优于SS400.在腐蚀性较强的3.5%NaCl溶液中，08MnNiVR的耐蚀性能略优于SS400，而且二者的自腐蚀电位相近，因此相互连接不易发生电偶腐蚀.

    08MnNiVR is a recently developed high strength steel for building crude oil tanks to meet the requirement of domestic strategic petroleum storage.Besides excellent mechanical properties and good weldability, corrosion resistance of 08MnNiVR is also one of the most important properties for its application.In the present paper,the corrosion properties of 08MnNiVR and a mild steel SS400 in a simulated atmosphere as well as in 3.5% NaCl solution were investigated by means of accelerated corrosion test and electrochemical testing technique.The results show that in the simulated atmosphere the corrosion rate of 08MnNiVR was significantly lower than that of SS400,however,in the 3.5%NaCl solution,a more corrosive environment,the difference in the corrosion rates for the two steels is small.The free-corrosion potentials of 08MnNiVR and SS400 were almost the same in 3.5%NaCl solution,so that the connection of the two steels inside the tank will be immune from galvanic corrosion.