Anodizing process for producing highly reflective aluminum materials

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(11)

EP 0 156 591 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	04.12.1985 Bulletin 1985/49

(43)	Date of publication A2:
	02.10.1985 Bulletin 1985/40

(21)	Application number: 85301754

(22)	Date of filing: 14.03.1985

(84)	Designated Contracting States:
	BE DE FR GB

(30)

Priority:

16.03.1984 US 590323
19.09.1984 US 651912

(71)	Applicant: ALUMINIUM COMPANY OF AMERICA
	()

(72)	Inventors:
	Powers, John H. () Dang, Hang T ()

(54)	Anodizing process for producing highly reflective aluminum materials

(57) @ An improved process is provided for the production of aluminum reflective material having a high total reflectance value. The process comprises controlling the anodizing conditions of an aluminum alloy by immersing the alloy in a DC anodizing bath containing at least 26 wt.% sulfuric acid and the anodizing sheet at a current density of at least 194 A/m² at a temperature of at least 15°C.

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