固溶处理对2205双相不锈钢耐蚀性能的影响
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摘要
利用箱式电阻炉、金相显微镜、电化学工作站等设备研究固溶处理温度对2205不锈钢在不同介质中显微组织和耐蚀性的影响。结果表明,随着固溶温度升高,奥氏体含量不断减少,铁素体含量不断增多;在p H值不同的溶液中,双相不锈钢的耐蚀性能有一定差异:酸性溶液中,在1 050℃左右进行固溶处理,此时的双相不锈钢奥氏体与铁素体含量比接近1∶1,耐酸性能较好,而在碱性溶液中,1 100℃固溶处理时的腐蚀速度较小,耐蚀性能较好;1 100℃固溶处理的双相不锈钢在含氯离子的环境中虽无明显钝化区,但腐蚀速率较小,具有一定耐点蚀性能。
The effects of temperatures on the corrosion resistances and microstructures of 2205 stainless steels in different media were studied by box resistance furnace,metallographic microscope,electrochemical workstation and other equipments. The results show that as the solution temperature increases,the austenite content decreases and the ferrite content increases. In solutions of different p H values the corrosion resistances of duplex stainless steels were different. In acidic solution,when the solution treatment was carried out at about 1 050 ℃,the corrosion resistance was the best and the ratio of austenite content to ferrite content was 1∶ 1; in alkaline solution,when the solution treatment was carried out at 1 100 ℃,the corrosion rate was the lowest; in Na Cl solution,when the solution treatment was carried out at 1 100 ℃,no obvious passive area appeared in the 2205 duplex stainless steel,but the corrosion rate was low and the corrosion resistance good.
The effects of temperatures on the corrosion resistances and microstructures of 2205 stainless steels in different media were studied by box resistance furnace,metallographic microscope,electrochemical workstation and other equipments. The results show that as the solution temperature increases,the austenite content decreases and the ferrite content increases. In solutions of different p H values the corrosion resistances of duplex stainless steels were different. In acidic solution,when the solution treatment was carried out at about 1 050 ℃,the corrosion resistance was the best and the ratio of austenite content to ferrite content was 1∶ 1; in alkaline solution,when the solution treatment was carried out at 1 100 ℃,the corrosion rate was the lowest; in Na Cl solution,when the solution treatment was carried out at 1 100 ℃,no obvious passive area appeared in the 2205 duplex stainless steel,but the corrosion rate was low and the corrosion resistance good.
引文
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[2]王进.固溶处理对S31803双相不锈钢力学行为和耐蚀性能的影响[D].哈尔滨:哈尔滨工业大学,2016.
[3]郑传波,申小兰,唐祝君.固溶温度对2507双相不锈钢组织与耐蚀性能的影响[J].金属热处理,2015,40(8):124—128.
[4]申小兰.2507双相不锈钢组织与腐蚀性能的研究[D].镇江:江苏科技大学,2015.
[5]贺宏,李静媛,秦丽雁,等.不同变形工艺后0Cr32Ni7Mo4N双相不锈钢的组织及性能[J].金属学报,2014,50(1):1—10..
[6]潘英才.高碳高铬双相不锈钢组织和性能的研究[D].济南:山东建筑大学,2013.
[7]李俊.固溶处理对超级双相不锈钢S32750组织和性能的影响[J].特殊钢,2012,33(4):64—66.
[8]赵洪普.热处理对00Cr26Ni5Mo2Cu3RE双相不锈钢耐蚀性的影响[D].洛阳:河南科技大学,2012.
[9]郑传波,陈曦.固溶处理温度对2507双相不锈钢组织结构及耐蚀性能的影响[J].广西科学院学报,2016,32(3):161—167.
[10]李姣.22Cr双相不锈钢焊接接头组织和综合性能的研究[D].西安:西安建筑科技大学,2009.
[11]秦紫瑞,李隆盛,贾克力,等.耐硫酸及其盐腐蚀的新型双相不锈钢的研究[J].硫酸工业,1996(4):26—31,35,60.
[12]陈兴润,潘吉祥.固溶温度对2205双相不锈钢组织和点蚀性能的影响[J].金属热处理,2014,39(12):38—42.
[13]陈雨来,罗照银,李静媛.固溶温度对S32760双相不锈钢组织与耐点蚀性能的影响[J].金属学报,2015,51(9):1085—1091.