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

Koangyong Hyun and Seong-Jong Kim
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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

Surface Review and Letters (SRL), 2017, vol. 24, issue 06, 1-8

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.

Keywords: Al alloy ships; water cavitation peening; corrosion resistance; ICCP (search for similar items in EconPapers)
Date: 2017
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DOI: 10.1142/S0218625X18500300

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