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利用电化学方法对不同固溶处理的2205双相不锈钢在卤水中的临界点蚀温度及临界点蚀电位进行了研究,结合显微金相技术研究了固溶处理温度对相含量及耐蚀性能的影响。结果表明:2205双相不锈钢在卤水中的临界点蚀温度介于55～60℃之间,临界点蚀电位随着环境温度的升高而降低;金属碳化物在固溶处理温度750～900℃范围内析出,奥氏体含量急剧减少材料耐蚀性能严重恶化;固溶处理温度1100℃保温1 h的试样耐蚀性能最佳。
The critical pitting temperature and critical pitting potential of 2205 duplex stainless steel treated by solution treatment were investigated by electrochemical method. The microstructure of the 2205 duplex stainless steel treated by solution treatment was studied. The phase composition and corrosion resistance Impact. The results show that the critical pitting temperature of 2205 duplex stainless steel in brine is between 55 and 60 ℃, and the critical pitting potential decreases with the increase of ambient temperature. When the temperature of solution treatment is between 750 ℃ and 900 ℃ Within the range of precipitation, the austenite content drastically reduced material corrosion resistance severely deteriorated; solution treatment temperature 1100 ℃ for 1 h of the sample corrosion resistance best.