Showa Aluminum Corporation

Showa Aluminum Kabushiki Kaisha

Toshimitsu Uchiyama

Hiroshi Matsumoto

Eizo Isoyama

Minoru Hasegawa

Masayuki Kaji

Tatsuo Ootsuka

Hiroichi Takenaka

An aluminum evaporator including a refrigerant tube and fins with a hydrophilic surface is prepared by forming a chemical coating over the surface of its components as assembled into a product or before fabrication, and thereafter forming a hydrophilic layer over the coating by treating the resulting components with a solution of silicic acid, silicate or colloidal silica.

Surface treatment process for imparting hydrophilic properties to

Colored aluminum powder is prepared by immersing finely divided aluminum in a weak alkali solution maintained at a temperature of 50.degree. C. to the boiling point of the solution and having a pH of 8 to 12, said solution containing a salt of iron, nickel, cobalt, zinc or copper, and at least one aliphatic amine having a chelating ability for the metal salt, to form a composite film which consists of a hydrated aluminum oxide and a hydrated oxide of the metal, and separating the aluminum from the solution.

Process for preparing colored aluminum powder

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Sakai, Japan

Toshimitsu Uchiyama