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Effect of GTAW remelting on the corrosion performance of AISI 316L cladding
Materials and Corrosion ( IF 1.6 ) Pub Date : 2020-09-02 , DOI: 10.1002/maco.202011666 Dikshant Malhotra 1 , Amandeep S. Shahi 1 , Kamal Gupta 1
Materials and Corrosion ( IF 1.6 ) Pub Date : 2020-09-02 , DOI: 10.1002/maco.202011666 Dikshant Malhotra 1 , Amandeep S. Shahi 1 , Kamal Gupta 1
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Gas tungsten arc welding (GTAW) process was used for remelting of the top clad layers of austenitic stainless steel 316L deposited on low‐carbon steel using gas metal arc welding (GMAW) process. Different electrochemical techniques were used for assessing and comparing sensitization and pitting corrosion performance of these clads (both in the as‐welded as well as aged condition), besides comparing their passive film characteristics. Top clad layer remelting was influential upto a penetration depth of around 2.34 mm. Aging of clads at 750°C/24 hr accelerated the precipitation of carbides, which suppressed partially due to their remelting as indicated by electron probe microanalysis studies. Due to this GTAW remelted clads exhibited a relatively lesser degree of sensitization and higher pitting corrosion resistance as compared to the conventional GMAW clads. X‐ray photoelectron spectroscopy studies revealed a relatively higher concentration of O, Cr, Ni, and Mo in the passive film of remelted clad surfaces than the conventional ones, which accounted for enhanced protectiveness of passive film on remelted surfaces as indicated by electrochemical impedance spectroscopy studies.
中文翻译：
GTAW重熔对AISI 316L熔覆层腐蚀性能的影响
气体钨极电弧焊（GTAW）工艺用于使用气体金属电弧焊（GMAW）工艺重熔沉积在低碳钢上的奥氏体不锈钢316L的顶层金属。除了比较它们的钝化膜特性外，还使用了不同的电化学技术评估和比较了这些复合层的敏化和点蚀性能（在焊接状态和老化状态下）。顶层熔覆层的重熔影响最大，穿透深度约为2.34毫米。包层在750°C / 24小时的时效加速了碳化物的沉淀，如电子探针显微分析研究所表明的，碳化物的沉淀在一定程度上受到了重熔的抑制。由于这种GTAW，与常规的GMAW包层相比，重熔的包层表现出相对较低的敏化度和更高的抗点蚀性。X射线光电子能谱研究表明，重熔复合表面的钝化膜中O，Cr，Ni和Mo的浓度相对高于传统方法，这说明电化学阻抗谱表明，重熔复合表面的钝化膜具有增强的保护性。学习。
更新日期：2020-09-02
中文翻译：
GTAW重熔对AISI 316L熔覆层腐蚀性能的影响
气体钨极电弧焊（GTAW）工艺用于使用气体金属电弧焊（GMAW）工艺重熔沉积在低碳钢上的奥氏体不锈钢316L的顶层金属。除了比较它们的钝化膜特性外，还使用了不同的电化学技术评估和比较了这些复合层的敏化和点蚀性能（在焊接状态和老化状态下）。顶层熔覆层的重熔影响最大，穿透深度约为2.34毫米。包层在750°C / 24小时的时效加速了碳化物的沉淀，如电子探针显微分析研究所表明的，碳化物的沉淀在一定程度上受到了重熔的抑制。由于这种GTAW，与常规的GMAW包层相比，重熔的包层表现出相对较低的敏化度和更高的抗点蚀性。X射线光电子能谱研究表明，重熔复合表面的钝化膜中O，Cr，Ni和Mo的浓度相对高于传统方法，这说明电化学阻抗谱表明，重熔复合表面的钝化膜具有增强的保护性。学习。
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