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<p>The present study represents a comprehensive investigation of GTAW Process implemented for ERNiCrMo-10 (Hastelloy C-22) weld overlay on SS 316&#xa0;L austenitic stainless steel. To assess the weld overlay’s performance, visual testing, hardness testing, bend testing, optical spectroscopy for chemical composition analysis, potentiodynamic polarization technique for corrosion resistance evaluation, as well as macro and microstructural observation were carried out. An average corrosion rate of 0.742 mpy for the overlay was achieved owing to uniform distribution. Microstructural study also observed primary and secondary inter-laminar spacing. These phases contribute to improved structural integrity and adequate hardness characteristics. Dilution of 1.5&#xa0;mm from the base metal was achieved which can be attributed to precise control and minimal alloy mixing, The average spacings between primary and secondary arms were also measured and values of 4.239&#xa0;μm and 4.559&#xa0;μm, were achieved. These findings particularly provide invaluable inputs to the considerate industry of petrochemical and pharmaceutical sectors.</p>

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Experimental investigations of Hastelloy C-22 weld overlay on SS 316 L using GTAW process

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年4月16日

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  • Jaykumar Vora,
  • Manish V. Mehta,
  • Robert Cep,
  • Vyomesh Buch,
  • Rakesh Chaudhari,
  • Viral Bhatt,
  • Ajay Kumar

摘要

The present study represents a comprehensive investigation of GTAW Process implemented for ERNiCrMo-10 (Hastelloy C-22) weld overlay on SS 316 L austenitic stainless steel. To assess the weld overlay’s performance, visual testing, hardness testing, bend testing, optical spectroscopy for chemical composition analysis, potentiodynamic polarization technique for corrosion resistance evaluation, as well as macro and microstructural observation were carried out. An average corrosion rate of 0.742 mpy for the overlay was achieved owing to uniform distribution. Microstructural study also observed primary and secondary inter-laminar spacing. These phases contribute to improved structural integrity and adequate hardness characteristics. Dilution of 1.5 mm from the base metal was achieved which can be attributed to precise control and minimal alloy mixing, The average spacings between primary and secondary arms were also measured and values of 4.239 μm and 4.559 μm, were achieved. These findings particularly provide invaluable inputs to the considerate industry of petrochemical and pharmaceutical sectors.