Method for surface treatment of metal blanks

Coating processes – Coating by vapor – gas – or smoke – Organic coating applied by vapor – gas – or smoke

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204 29, 204 387, 204140, 427318, 427319, 427386, 427405, 427410, C23C 1600

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046507000

ABSTRACT:
Surface treatment of metal blanks is achieved by applying an oxirane ring-containing compound in the gas phase to the surface of a metal blank maintained at a high temperature. According to this method, a covering layer which is much thinner than a conventional so-called adhesive primer coating layer and has a thickness of the angstrom order is formed on the surface of a metal blank. If a thermoplastic resin layer is coated on the metal surface treated with this oxirane ring-containing compound, the initial adhesion and the adhesion after lapse of time are highly improved over these adhesions attainable by the conventional methods. Even if a lacquer containing a thermosetting resin instead of the thermoplastic resin is coated and dried on the metal surface treated with this bonding compound, a similar effect can be attained. Accordingly, when an organic material is bonded or laminated to the so-treated metal surface or when metal-to-metal bonding is performed, a strong bonding can be maintained in the bonded portion.

REFERENCES:
patent: 3161530 (1964-12-01), Strobel
patent: 3921847 (1975-11-01), Rentmeester
patent: 4410581 (1983-10-01), Nam
patent: 4543275 (1985-09-01), Akashi et al.

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