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<p>Low temperature multi-effect distillation (LT-MED) technology holds significant promise for seawater desalination. However, the corrosion and damage of heat exchange tubes critically impair production efficiency. Plasma-enhanced chemical vapor deposition (PECVD) offers a method for depositing diamond-like carbon (DLC) films on both the inner and outer surfaces of these tubes. DLC films exhibit excellent corrosion and wear resistance, making them a promising material for protecting seawater desalination heat exchange tubes. Pre-treatment, such as argon (Ar) etching, can remove the passivation layer on the substrate surface, thereby influencing the film’s microstructure and corrosion resistance. Consequently, this study investigates the optimal Ar etching time to enhance DLC film performance. The corrosion resistance of the deposited films in artificial seawater was evaluated. This research aims to provide a protective material with combined corrosion and wear resistance for LT-MED heat exchange tubes and offer guidance for their corrosion prevention and protection.</p>

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Application of DLC Film in the Field of Seawater Desalination Heat Exchange Tube Protection

  • 期刊论文

  • 发表日期：

    2026年8月3日

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  • Shaolong Wang,
  • Zhengyu Liu,
  • Guangan Zhang,
  • Yuefei Ji

摘要

Low temperature multi-effect distillation (LT-MED) technology holds significant promise for seawater desalination. However, the corrosion and damage of heat exchange tubes critically impair production efficiency. Plasma-enhanced chemical vapor deposition (PECVD) offers a method for depositing diamond-like carbon (DLC) films on both the inner and outer surfaces of these tubes. DLC films exhibit excellent corrosion and wear resistance, making them a promising material for protecting seawater desalination heat exchange tubes. Pre-treatment, such as argon (Ar) etching, can remove the passivation layer on the substrate surface, thereby influencing the film’s microstructure and corrosion resistance. Consequently, this study investigates the optimal Ar etching time to enhance DLC film performance. The corrosion resistance of the deposited films in artificial seawater was evaluated. This research aims to provide a protective material with combined corrosion and wear resistance for LT-MED heat exchange tubes and offer guidance for their corrosion prevention and protection.