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<p>In this research, the electrochemical corrosion behaviour of a WAAM-fabricated nickel-based alloy produced using industrial standard parameters is investigated. The three different corrosive mediums 3.5% NaCl, 1.0&#xa0;M HCl, and 1.0&#xa0;M H₂SO₄ solutions is used to simulate the chloride and acidic environment. A potentiodynamic – work cell is used to study the corrosion rate through TAFEL plot of each medium. The results show that the corrosion rate strongly depends on the corrosive medium. The alloy exhibits the lowest corrosion rate of 0.0268&#xa0;mm/yr in 3.5% NaCl, indicating good corrosion resistance in a saline environment. In contrast, higher corrosion rates of 0.2357&#xa0;mm/yr in HCl and 1.4447&#xa0;mm/yr in H₂SO₄ were observed due to the aggressive acidic conditions. The study highlights the influence of different environments on the corrosion behaviour of WAAM Inconel 718.</p>

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Electrochemical corrosion performance of wire arc additively manufactured inconel 718 in chloride and acidic environments

  • 期刊论文

  • 发表日期：

    2026年7月9日

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  • Shibin Thomas,
  • S Vignesh,
  • Winowlin Jappes JT,
  • Niyas Salim

摘要

In this research, the electrochemical corrosion behaviour of a WAAM-fabricated nickel-based alloy produced using industrial standard parameters is investigated. The three different corrosive mediums 3.5% NaCl, 1.0 M HCl, and 1.0 M H₂SO₄ solutions is used to simulate the chloride and acidic environment. A potentiodynamic – work cell is used to study the corrosion rate through TAFEL plot of each medium. The results show that the corrosion rate strongly depends on the corrosive medium. The alloy exhibits the lowest corrosion rate of 0.0268 mm/yr in 3.5% NaCl, indicating good corrosion resistance in a saline environment. In contrast, higher corrosion rates of 0.2357 mm/yr in HCl and 1.4447 mm/yr in H₂SO₄ were observed due to the aggressive acidic conditions. The study highlights the influence of different environments on the corrosion behaviour of WAAM Inconel 718.