Study of Corrosion on Film Properties of High Strength Cu-Sn-Zr Alloys in Tap Water

• 作者: Itaru Ikeda Motoki Kuratani Noriyuki Tanaka Osamu Sakurada Yutaka Yamada
• 来源期刊: 材料科学与应用期刊(英文)
• 学科: 工学
• 关键词: Cu-Sn-Zr Alloy CORROSION Resistance Heat EXCHANGER HOT Water Supply System Flow CONDITION
• 年，卷（期）: clkxyyyqkyw_2020,（1）
• 页码范围: 70-80
• 页数: 11页
• 分类号: TG1

摘要

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.