Scholarlink

<p>As a structural steel used in ships and offshore engineering, DH36 is vulnerable to corrosion caused by seawater and microorganisms in the marine environment, which significantly diminishes its service life. To enhance both the strength and corrosion resistance of DH36 steel, a Ni/Ni-Cu alloy coating was prepared through pulsed electrodeposition on its surface. The microscopic morphology and corrosion resistance of the coating were characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and electrochemical workstations. Additionally, the antimicrobial performance of the coating in seawater was evaluated using the plate colony counting method. The results indicated that under the conditions of 45&#xa0;°C, a current density of 0.05 A cm<sup>−2</sup>, a pulsed electrodeposition duty cycle of 50% and a pulsed electrodeposition frequency of 20,000&#xa0;Hz, a Ni/Ni-Cu coating exhibiting fine grains and a uniform surface was achieved, with a coating hardness of 484.7 HV0.3, a corrosion current of 1.078 × 10<sup>−7</sup> A cm<sup>−2</sup> and a bacterial inhibition rate of up to 82.5% in seawater.</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

Optimizing Ni/Ni-Cu Multilayer Alloy Coating via Pulsed Electrodeposition: Process Parameter Analysis and Antibacterial Performance

  • 期刊论文

  • 发表日期：

    2025年7月8日

查看全文
  • Zhibo Hu,
  • Yiyong Wang,
  • Zhipeng Liang,
  • Hui Jin,
  • Jidong Li,
  • Zhe Ning

摘要

As a structural steel used in ships and offshore engineering, DH36 is vulnerable to corrosion caused by seawater and microorganisms in the marine environment, which significantly diminishes its service life. To enhance both the strength and corrosion resistance of DH36 steel, a Ni/Ni-Cu alloy coating was prepared through pulsed electrodeposition on its surface. The microscopic morphology and corrosion resistance of the coating were characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and electrochemical workstations. Additionally, the antimicrobial performance of the coating in seawater was evaluated using the plate colony counting method. The results indicated that under the conditions of 45 °C, a current density of 0.05 A cm−2, a pulsed electrodeposition duty cycle of 50% and a pulsed electrodeposition frequency of 20,000 Hz, a Ni/Ni-Cu coating exhibiting fine grains and a uniform surface was achieved, with a coating hardness of 484.7 HV0.3, a corrosion current of 1.078 × 10−7 A cm−2 and a bacterial inhibition rate of up to 82.5% in seawater.