HEAT EXCHANGER, AND ITS MANUFACTURING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a heat exchanger, and its manufacturing method capable of providing coloring in place of coating under a primary condition during brazing. SOLUTION: In the heat exchanger made of aluminum or aluminum alloy, at least one part of a core part 110 surface has a black coloring layer formed by a noncorrosive flux mixed with a black metallic oxide. In the manufacturing method of the heat exchanger, a coating composition provided by mixing the noncorrosive flux for brazing and the black metallic oxide is applied beforehand to a predetermined portion of a core part 110 to carry out brazing. COPYRIGHT: (C)2006,JPO&NCIPI