Scholarlink

<p>The widespread application of magnesium (Mg) and Mg alloys is limited by their poor corrosion resistance. Micro-arc oxidation (MAO) is a common surface treatment, but the inherent defects of the MAO coating require post-treatment to ensure good corrosion protection. Therefore, various zeolitic imidazolate framework ZIF-67@Co-<i>M</i> (<i>M</i> = Fe, Al, Ni) layered double hydroxides (LDHs) composite coatings were fabricated on MAO-treated AZ31 Mg alloy to enhance its corrosion resistance. The surface characteristics, coating thickness, corrosion resistance and protection mechanisms of the ZCM (ZIF-67@Co-<i>M</i> LDHs) composite coatings were examined. The findings indicate that the ZCF (ZIF-67@Co-Fe LDHs) composite coating exhibits the lowest corrosion current density (<i>i</i><sub>corr</sub> = 7.76 × 10<sup>–8</sup> A/cm<sup>2</sup>), superior corrosion resistance, the lowest corrosion rate (HEV = 2.46&#xa0;mL·cm<sup>–2</sup>) and the fastest response speed to corrosion. The synergistic integration of ZIF-67 and LDHs effectively prevents the invasion of corrosive media, enhancing both short-term and long-term corrosion resistance of AZ31 alloys. These composite coatings surpass the limitations of individual materials, providing a promising strategy for durable corrosion protection.</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

Evaluation of Corrosion Resistance for ZIF-67@Co-M (M = Fe, Al, Ni) LDHs Composite Coatings Based on AZ31 Magnesium Alloy

  • 期刊论文

  • 发表日期：

    2025年8月19日

查看全文
  • Yonghua Chen,
  • Zhenzhen Tian,
  • Fubing Yu,
  • Mingyi Wu,
  • Wenhui Yao,
  • Yuantai He,
  • Yuan Yuan,
  • Zhihui Xie,
  • Guozhi Wu,
  • Jiahao Wu,
  • Fusheng Pan,
  • Liang Wu

摘要

The widespread application of magnesium (Mg) and Mg alloys is limited by their poor corrosion resistance. Micro-arc oxidation (MAO) is a common surface treatment, but the inherent defects of the MAO coating require post-treatment to ensure good corrosion protection. Therefore, various zeolitic imidazolate framework ZIF-67@Co-M (M = Fe, Al, Ni) layered double hydroxides (LDHs) composite coatings were fabricated on MAO-treated AZ31 Mg alloy to enhance its corrosion resistance. The surface characteristics, coating thickness, corrosion resistance and protection mechanisms of the ZCM (ZIF-67@Co-M LDHs) composite coatings were examined. The findings indicate that the ZCF (ZIF-67@Co-Fe LDHs) composite coating exhibits the lowest corrosion current density (icorr = 7.76 × 10–8 A/cm2), superior corrosion resistance, the lowest corrosion rate (HEV = 2.46 mL·cm–2) and the fastest response speed to corrosion. The synergistic integration of ZIF-67 and LDHs effectively prevents the invasion of corrosive media, enhancing both short-term and long-term corrosion resistance of AZ31 alloys. These composite coatings surpass the limitations of individual materials, providing a promising strategy for durable corrosion protection.