| 摘要 |
PURPOSE:To obtain a copper alloy having excellent corrosion resistance from a Zn- P-Cu alloy with a specific compositional ratio, having a specific crystal grain size. CONSTITUTION:A corrosion-resistant copper alloy consisting of 25-38wt% zinc, 0.005-0.040wt% phosphorus, and copper and having a crystal grain size of 2-10mu is prepared and then used in the manufacture of a heat exchanger with thin thickness. The amounts of Zn and P which are closely related to the corrosiveness of the copper alloy should be in the said given range, and also the said crystal grain size of the copper aloy should be kept from a point of view of the corrosiveness, which can be regulated by the annealing condition (temperatureXtime) for the alloying material.
|
