TAP AND DEVICE FOR PREVENTING PATINA GENERATION, AND METHOD FOR PREVENTING TAP AND DEVICE MADE OF COPPER AND COPPER ALLOY FROM GENERATING PATINA

摘要

PROBLEM TO BE SOLVED: To provide a method for preventing patina generation in a tap and the device made of copper and a copper alloy used for a feedwater system, and maintaining performance of a film without continuously doping organic acid in water. SOLUTION: The tap and the device for preventing patina generation is characterized by having a film containing a carbonyl group, on the surface of the tap and the device made of a copper alloy used for the feedwater system.