| 摘要 |
PURPOSE:To provide the titled copper alloy excellent in heat conductivity and corrosion resistance and having good processability, obtained by adding a specific amount of Ni and Sn to Cu and limiting the content of oxygen to a minute amount. CONSTITUTION:A copper alloy for the fin of an automobile radiator contains 0.005-1.0wt% Ni, 0.005-0.5% Sn and 50ppm or less O and comprises the remainder of Cu and is one of which the corrosion resistance is enhanced by suppressing the formation and growth of Cu2O in air having chlorine, nitrogen oxide and sulfur dioxide gas mixed therein by adding a small amount of Ni to Cu without too lowering inherent heat conductivity of Cu and further enhanced by synergistic effect with Ni brought about by adding a small amount of Sn to Cu. The content of O is limited to a minute amount and the formation of a dense oxide film is made easy to enhance corrosion resistance and to attain to improve rolling processability.
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