Other

Morita Chemical Industry Co., Ltd.

Eiji Itaya

Makoto Ono

Satoshi Tanaka

Takaaki Sakane

Tatsuo Ozaki

Yutaka Yanagawa

Satomi Muto

Hirokazu Yamaguchi

Masahiro Hattori

Radiator caps ( ) and radiator tubes ( ) are heat brazed with an ingot Z of a sacrificial material being disposed in the interior of a radiator tank main body ( ), whereby, as the ingot Z of the sacrificial material is heated while being surrounded by the radiator tank main body ( ), the evaporated sacrificial material is allowed to adhere to internal surfaces of the radiator tank main body ( ) relatively uniformly, the sacrificial material so adhering to the internal surfaces being then allowed to be radiated into aluminum constituting the radiator tank main body ( ) to thereby form an alloy layer (a corrosion preventing layer) containing therein the sacrificial material heavily on the internal surface of the radiator tank main body ( ).

Corrosion preventing layer forming method

A flux for brazing aluminum members comprising potassium tetrafluoroaluminate, potassium pentafluoroaluminate and oxyfluoroaluminum, accomplishing the brazing of aluminum members at temperatures 5.degree. C. to 20.degree. C. lower than the temperature of conventional brazing that uses fluoride fluxes. Thus, heating energy required for the brazing can thus be saved, and conventional brazing equipment can be used as it is, in principle, without any changes; and since no expensive elements are used in the fluxes, the cost of brazing aluminum members can be reduced.

Flux for brazing aluminum members

Growing community of inventors

Tokyo, Japan

Eiji Itaya