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July 10, 2026Materials and Corrosion

Formation and Failure of γ‐NiOOH During Nickel Corrosion in Oxygen‐Pressured Concentrated Alkali at 270°C

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Authors

YGYian GaoPZPeng ZhouYZYuanjin Zhan

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Overview

Randomized trial investigates corrosion behavior of nickel in alkaline environments, revealing limitations of γ-NiOOH as a protective layer.

Key Points

  • To examine the corrosion behavior of pure nickel in concentrated alkaline environments under oxidizing conditions.
  • Conducted weight-loss measurements to assess corrosion rates.
  • Utilized SEM, XRD, Raman, and XPS for surface and phase characterization.
  • Maintained conditions at 270°C and 4.2 MPa of oxygen pressure.
  • Corrosion rate of nickel reached 6.088 ± 0.16 mm y −1 at 168 h (mean ± SD, n = 3).
  • Identified flake-like solids as γ-NiOOH, while a thin Ni(OH)2 layer appeared inadequate for protection.
  • Continuous nickel exposure due to non-establishment of a protective film contributed to high corrosion rates.

Cite This Study

Gao et al. (2026) studied this question.

synapsesocial.com/papers/6a508da76eeac72a437a10f5https://doi.org/10.1002/maco.70201
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