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通过测量阳极极化曲线研究了固溶处理温度对超级双相不锈铸钢在人工海水中腐蚀的影响.结果表明:经不同温度固溶处理的超级双相不锈铸钢材料在人工海水中自腐蚀电位相差不大,均具有钝化性能,维钝电流密度为0.1 mA/cm~2左右;室温海水中,不同温度的固溶处理对腐蚀电流密度影响也不大;海水温度由室温升至80℃,钝化区宽度急剧变窄,击破电位显著下降.经1150℃固溶处理后,Cr、Mo在铁素体与奥氏体两相中的均匀分配,有利于提高超级双相不锈铸钢在海水中耐蚀性.
The effect of solution treatment temperature on the corrosion of super duplex stainless steel in artificial seawater was studied by measuring the anodic polarization curves.The results show that the super duplex stainless steel treated by solution heat treatment in artificial seawater At room temperature, the solution treatment at different temperatures has little effect on the corrosion current density. The temperature of the seawater decreases from room temperature to room temperature When the temperature is increased to 80 ℃, the width of the passivation zone sharply narrows and the rupture potential decreases significantly. After the solution treatment at 1150 ℃, the uniform distribution of Cr and Mo in the ferrite and austenite phases is beneficial to the improvement of the super- Stainless steel corrosion resistance in seawater.