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OPTIMUM CORROSION PROTECTION POTENTIAL FOR WATER CAVITATION PEENING-PROCESSED Al–Mg ALLOY IN SEAWATER

Author

Listed:
  • KOANGYONG HYUN

    (Department of Environmental Science and Technology, Faculty of Engineering, Shinshu University, 4-17-1 Wakasato, Nagano 380-8553, Japan)

  • SEONG-JONG KIM

    (#x2020;Division of Marine Engineering, Mokpo Maritime University, 91 Haeyangdaehak–ro, Mokpo 58628, South Korea)

Abstract

Chloride ions in seawater can destroy the passive state films on the exposed surface of aluminum (Al) alloy ships. This shortens hull lifespan and increases the maintenance costs of ships. Recently, the water cavitation peening (WCP) technology has been adopted to form compressive residual stress on surfaces to improve resistance to cavitation. This study was conducted to investigate corrosion damage prevention by applying the WCP technology to 5083-O Al alloy for ships; the optimum WCP duration and corrosion protection potential range for maintaining corrosion resistance were determined. We found that the optimum WCP duration was 2.5min by performing a potentiostatic experiment, and the optimum corrosion protection potential range was −1.30V–−0.75V for ICCP system.

Suggested Citation

  • Koangyong Hyun & Seong-Jong Kim, 2017. "OPTIMUM CORROSION PROTECTION POTENTIAL FOR WATER CAVITATION PEENING-PROCESSED Al–Mg ALLOY IN SEAWATER," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 24(06), pages 1-8, August.
    • Handle: RePEc:wsi:srlxxx:v:24:y:2017:i:06:n:s0218625x18500300
    DOI: 10.1142/S0218625X18500300
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