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<p>This article is the study of Monel-400/SS-316L bimetallic butt-welded joint’s acid-induced corrosion, mechanical properties, and microstructural behavior with ERNiCrMo-3 filler metal. These included optical microscopy, Vickers microhardness testing, corrosion testing, tensile strength evaluation, and field emission scanning electron microscopy with energy-dispersive spectroscopy. Utilizing a specifically designed copper backing fixture, a novel method was employed to minimize thermal distortion and provide even heat distribution throughout the welding process. The results demonstrated enhanced mechanical properties and corrosion resistance together with strong metallurgical bonding at the fusion zone. Monel-400 exhibits enhanced resistance to corrosion than SS-316L and the welded zone, respectively. In challenging service conditions, ERNiCrMo-3 filler was shown to dramatically minimize components segregation and cracking tendencies, making it a suitable alternative for welding dissimilar connections.</p>

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Experimental Investigation on Acid-Induced Corrosion, Mechanical, and Microstructure Behavior of Monel-400/SS-316L Butt-Welded Joints Using ERNiCrMo-3 Filler

  • 期刊论文

  • 发表日期：

    2025年11月27日

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  • A. Gnanarathinam,
  • D. Palanisamy,
  • D. Umapathi

摘要

This article is the study of Monel-400/SS-316L bimetallic butt-welded joint’s acid-induced corrosion, mechanical properties, and microstructural behavior with ERNiCrMo-3 filler metal. These included optical microscopy, Vickers microhardness testing, corrosion testing, tensile strength evaluation, and field emission scanning electron microscopy with energy-dispersive spectroscopy. Utilizing a specifically designed copper backing fixture, a novel method was employed to minimize thermal distortion and provide even heat distribution throughout the welding process. The results demonstrated enhanced mechanical properties and corrosion resistance together with strong metallurgical bonding at the fusion zone. Monel-400 exhibits enhanced resistance to corrosion than SS-316L and the welded zone, respectively. In challenging service conditions, ERNiCrMo-3 filler was shown to dramatically minimize components segregation and cracking tendencies, making it a suitable alternative for welding dissimilar connections.