Scholarlink

<p>Nickel-aluminum bronze (NAB) alloy is a potential candidate for marine applications due to its high corrosion and wear resistance. However, the as-cast defects and severe water turbulence affect the service life of the NAB alloy components. The current study addresses the same by surface modification of NAB by a facile electrochemical deposition technique. A ternary CuCoNi alloy was electrodeposited to enhance the service life of the NAB in marine environments. The coatings were deposited at different pHs of the electrolyte, namely 2.2, 2.5, 3.0, and 3.5. The effect of electrolyte’s pH on the structural, morphological, wettability, and corrosion properties of the CuCoNi alloy coatings was further explored. All the deposited coatings were nanocrystalline with an FCC crystal structure, exhibited hydrophobicity, and showed better corrosion resistance than the NAB substrate. Among them, the coating deposited at pH 2.2 showed the lowest corrosion rate of 2.67&#xa0;µA/cm<sup>2</sup>, the highest polarization resistance of 7.07&#xa0;kΩ/cm<sup>2</sup>, the lowest porosity of 0.054%, and the highest water contact angle of ≈ 150°. The high corrosion performance of this coating was due to its lowest wettability and near superhydrophobicity, lowest porosity, and uniformly distributed fine, dense particles in its surface morphology.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Unveiling the influence of electrolyte pH on microstructure, wettability, and corrosion behavior of Cu-rich CuCoNi ternary alloy coatings on NAB

  • 期刊论文

  • 发表日期：

    2026年1月24日

查看全文
  • Shrawan Kumar Bairwa,
  • Suresh Bandi,
  • Brij Mohan Mundotiya

摘要

Nickel-aluminum bronze (NAB) alloy is a potential candidate for marine applications due to its high corrosion and wear resistance. However, the as-cast defects and severe water turbulence affect the service life of the NAB alloy components. The current study addresses the same by surface modification of NAB by a facile electrochemical deposition technique. A ternary CuCoNi alloy was electrodeposited to enhance the service life of the NAB in marine environments. The coatings were deposited at different pHs of the electrolyte, namely 2.2, 2.5, 3.0, and 3.5. The effect of electrolyte’s pH on the structural, morphological, wettability, and corrosion properties of the CuCoNi alloy coatings was further explored. All the deposited coatings were nanocrystalline with an FCC crystal structure, exhibited hydrophobicity, and showed better corrosion resistance than the NAB substrate. Among them, the coating deposited at pH 2.2 showed the lowest corrosion rate of 2.67 µA/cm2, the highest polarization resistance of 7.07 kΩ/cm2, the lowest porosity of 0.054%, and the highest water contact angle of ≈ 150°. The high corrosion performance of this coating was due to its lowest wettability and near superhydrophobicity, lowest porosity, and uniformly distributed fine, dense particles in its surface morphology.