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钼元素对310s不锈钢管抗点蚀性能的影响
人气:0  上传时间:2020/9/26 10:56:09  来源:http://ykflt.com

  MUYUANSUDUI310sBUXIUGANGGUANKANGDIANSHIXINGNENGDEYINGXIANG

  YIZHONGZHONGYAOHEJINYUANSUMoZAILVLIZIFUSHIHUANJINGXIAZEQIDAOLETIGAO310sBUXIUGANGGUANNAIDIANSHIXINGNENGDEZUOYONG。MoZAI310sBUXIUGANGGUANDIANSHIGUOCHENGZHONGDEYINGXIANGKEYIFENWEILIANGGEFANGMIAN:

  SHOUXIAN,MoYUANSUHUIGAIBIAN310sBUXIUGANGGUANDUNHUAMODEDIANHUAXUEXINGNENG,CONGERSHIQIZAILVLIZIFUSHIHUANJINGXIAGENGWEIWENDING。MoYUANSUZAIDUNHUAMOZHONGBIAOXIANWEIMoO2-4DEXINGSHI。MUSUANYANDECUNZAIDAOZHIDUNHUAMOWEIDIANCHIFANYINGZHONGDIANZIXUANZEXINGCHANSHENGBIANHUA,CONGERDUNHUAMODEDIANHUAXUEXINGNENGFASHENGGAIBIAN。YANJIUBIAOMING:GAIBIANDIANHUAXUEXINGNENGHOUDEDUNHUAMOZAILVLIZIFUSHIHUANJINGZHONGGENGWEIWENDING,ZAIJIEDUANYIZHILEDIANSHIGUOCHENGDEFASHENG。

  其次,Mo元素会促进310s不锈钢管的再钝化过程。为Mo元素的电位与pH平衡。点蚀过程中蚀孔内存在由闭塞电池导致的自催化酸化作用,孔内氯化物浓度增加,pH降低。当pH降至4以下后,Mo元素以氧化物的形态存在,即钼酸盐转化为MoO3。而钼氧化物在氯离子腐蚀环境中不易溶解,将附着于310s不锈钢管表面,从而隔离310s不锈钢管与腐蚀环境,促进了310s不锈钢管的再钝化过程。


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