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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 19    No. 4    August 2009

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Effects of solution heat treatment on corrosion resistance of
5083F Al alloy
Seong-Jong KIM, Seok-Ki JANG

Division of Marine Engineering, Mokpo Maritime University, Mokpo City, Jeonnam, 530-729, Korea

Abstract:Aluminum alloys are used as substitutes for fiber reinforced polymer(FRP) in ships and boats. However, ships constructed with 5000-series Al alloy suffer a little corrosion in the marine environment, when they run in high speed, and high flow rate, etc. Therefore, solution heat treatment was carried out to prevent corrosion. The optimal heat treatment involved heating specimens for 120 min at 420 ℃ and then cooling them in water. In addition, the optimal ageing condition involved ageing specimens for 240 min at 180 ℃. The slow strain rate test(SSRT) in a seawater revealed that heat treatment under optimal conditions produced improved elongation, time-to-fracture and amount of dimples compared with the as-received specimen.

 

Key words: aluminum alloy; seawater; solution heat treatment

ISSN 1672-7029
CN 43-1423/U

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