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深冷温度对AZ31镁合金CMT接头耐蚀性的影响
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太原科技大学,太原科技大学,太原科技大学,太原科技大学,太原科技大学,太原科技大学

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TG146.2

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山西省基础研究项目(201601D011036);山西省基础研究项目(青年基金)(2015021130);科大博士启动基金(20122045);科大博士后基金(20152031)


Effect of Cryogenic Treatment Temperature on Corrosion Resistance of AZ31 Magnesium Alloy CMT Weld Joint
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Taiyuan University of Science and Technology,Taiyuan University of Science and Technology,Taiyuan University of Science and Technology,Taiyuan University of Science and Technology,Taiyuan University of Science and Technology,Taiyuan University of Science and Technology

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    摘要:

    采用电化学方法研究了深冷处理温度对AZ31镁合金CMT(Cold Metal Transfer)焊接接头腐蚀行为的影响。结果表明:与未深冷时相比,经-100℃/4 h、-140℃/4 h、-180℃/4 h三组参数深冷处理后的接头焊缝区耐蚀性能得到不同程度提高,随着深冷温度降低,耐蚀性能呈先升高后下降的趋势变化,深冷处理对焊缝区中第二相的尺寸、含量及分布的改变是决定这一趋势的关键因素。其中经-140℃/4h深冷处理的焊缝区电荷转移电阻和腐蚀产物膜电阻最大,腐蚀电流最低,耐蚀性能最佳。

    Abstract:

    Effect of cryogenic treatement temperature to corrosion behavior of AZ31 magnesium cold metal transfer(CMT) weld joint was studied by adopting electrochemical method.Result was that compared to non-cryogenic joint,the corrosion resistance of joints that were cryogenic treated under -100℃/4h,-140℃/4h,-180℃/4h were increased to a different extent.With the temperature decrease,the corrosion resistances show a downward curve after the initial raise.Critical cause of this trend are the change of the size,quantity and distribution of the second phase caused by cryogenic treatment. The weld zone that was cryogenic treated under -140℃/4h shows the best corrosion resistance because the charge transfer resistance and corrosion product film resistance of that reaches maximum and the corrosion current of that reaches minimum.

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陈金秋,吴志生,崔超,赵菲,帅朋,韩宇.深冷温度对AZ31镁合金CMT接头耐蚀性的影响[J].稀有金属材料与工程,2018,47(5):1543~1549.[Chen Jinqiu, Wu Zhisheng, Cui Chao, Zhao Fei, Shuai Peng, Han Yu. Effect of Cryogenic Treatment Temperature on Corrosion Resistance of AZ31 Magnesium Alloy CMT Weld Joint[J]. Rare Metal Materials and Engineering,2018,47(5):1543~1549.]
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  • 收稿日期:2017-04-06
  • 最后修改日期:2017-06-06
  • 录用日期:2017-06-23
  • 在线发布日期: 2018-06-08
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