Cu-based material of good corrosion resistance

摘要

A Cu-based material of good corrosion resistance is used in the presence of sulfur, and includes a Cu-Ni-based alloy. The Cu-Ni-based alloy includes Ni in an amount of from 10 to 70% by weight, a readily oxidizable element, and the balance of Cu and inevitable impurities. The readily oxidizable element is likely to react with oxygen to produce oxides. The resulting oxides make it possible to inhibit the sulfur from reacting with the Cu-Ni-based alloy to produce sulfides (e.g., CuS, etc.). The readily oxidizable element can be at least one element selected from the group consisting of Zn and Mn. The oxides of the readily oxidizable element is formed on the surface of the Cu-based material, and interferes with the reactions of the copper, involved in the Cu-Ni-based alloy, and the sulfur. Thus, the oxides can inhibit the sulfides from being produced, and can keep the Cu-based material from being corroded by the sulfides. <IMAGE>