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Study of Corrosion on Film Properties of High Strength Cu-Sn-Zr Alloys in Tap Water
Yanagido, Gifu-Shi, Gifu University, Gifu, Japan
Kitanagai Miyoshi-Machi, Iruma-Gun, Technical Research Laboratory, DAI-DAN Co. Ltd., Saitama, Japan
Yanagido, Gifu-Shi, Gifu University, Gifu, Japan
Yanagido, Gifu-Shi, Gifu University, Gifu, Japan
Yanagido, Gifu-Shi, Gifu University, Gifu, Japan
- 1 Yanagido, Gifu-Shi, Gifu University, Gifu, Japan
- 2 Kitanagai Miyoshi-Machi, Iruma-Gun, Technical Research Laboratory, DAI-DAN Co. Ltd., Saitama, Japan
- 3 Yanagido, Gifu-Shi, Gifu University, Gifu, Japan
- 4 Yanagido, Gifu-Shi, Gifu University, Gifu, Japan
- 5 Yanagido, Gifu-Shi, Gifu University, Gifu, Japan
Materials Sciences and Applications·Volume 11 (2019)·Pages 70–80·Published 30 December 2019·DOI10.4236/msa.2020.111006
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Abstract
Corrosion has been reported to occur in the copper tubes of heat ex-changers in multiple-circulation hot water supply systems. We have been investigating the applicability of high-strength Cu-0.65 mass% Sn-0.014 mass% Zr-0.020 mass% P alloy to counteract this corrosion. Immersion tests, electrochemical measurements, and field tests were performed. Excellent corrosion resistance of the alloy was established under conditions with flowing water due to the formation of composite films containing tin. The alloy is expected to be better than copper as a corrosion-resistant material for heat exchanger tubes.
KeywordsCu-Sn-Zr AlloyCorrosion ResistanceHeat ExchangerHot Water Supply SystemFlow Condition
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