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In marine environments, the presence of chloride in concrete accelerates steel corrosion, leading to significant structural deterioration and high maintenance costs, highlighting the need for effective prevention techniques against chloride-induced macrocell corrosion. This study compares the performance of Zinc Layer Anodes (ZLA) and Embedded Zinc Anodes (EZA) in both chloride-contaminated and non-chloride-contaminated concrete, focusing on protective distance, and current density. Two sets of concrete specimens were prepared to facilitate this comparison: one with 1% chloride and another with 0% chloride by weight of binder. After curing for 28 days, anode performance was monitored weekly for 4 weeks under controlled conditions that mimicked a marine environment with wet-dry cycles. Measurements included current densities, on-potential, instant off-potential, and off-potential of steel at different locations. The results indicated that ZLA provides superior corrosion protection in terms of greater corrosion protection distances and lower current discharge compared to EZA. These outcomes enhance understanding and provide guidelines for designing and installing sacrificial anode systems in marine environments.

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Performance of Surfaces Bonded and Embedded Zinc Sacrificial Anode to Protect Corrosion of Reinforcing Steel

  • 会议论文

  • 发表日期：

    2025年

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  • Ramida Tanvilai,
  • Nathan Kengkriengkrai,
  • Pareploy Phokhao,
  • Pakawat Sancharoen,
  • Somnuk Tangtermsirikul

摘要

In marine environments, the presence of chloride in concrete accelerates steel corrosion, leading to significant structural deterioration and high maintenance costs, highlighting the need for effective prevention techniques against chloride-induced macrocell corrosion. This study compares the performance of Zinc Layer Anodes (ZLA) and Embedded Zinc Anodes (EZA) in both chloride-contaminated and non-chloride-contaminated concrete, focusing on protective distance, and current density. Two sets of concrete specimens were prepared to facilitate this comparison: one with 1% chloride and another with 0% chloride by weight of binder. After curing for 28 days, anode performance was monitored weekly for 4 weeks under controlled conditions that mimicked a marine environment with wet-dry cycles. Measurements included current densities, on-potential, instant off-potential, and off-potential of steel at different locations. The results indicated that ZLA provides superior corrosion protection in terms of greater corrosion protection distances and lower current discharge compared to EZA. These outcomes enhance understanding and provide guidelines for designing and installing sacrificial anode systems in marine environments.