| 摘要 |
PURPOSE:To obtain a film having good corrosion resistance by curing at relatively low temp., by a method wherein the under-coating of a specific wash primer is applied to a metal cast and forged product and urethane resin paint is subsequently applied thereto to cure the formed film in an amine atmosphere. CONSTITUTION:A wash primer used as under-coat consists of a base material based on a butyral resin and zinc chromate and a curing agent based on phosphate. This under coat is applied to the surface of a metal cast and forged product such as an iron cast article or an aluminum die cast product and urethane resin paint such as two pack type polyurethane product is subsequently applied thereto to be cured in an evaporated amine atmosphere or the urethane paint may be subjected to atomizing painting by air containing evaporated amine. Because curing can be performed at ambient temp. or at low temp. of 100 deg.C or less in both cases, a corrosion resistant film having no transparent part due to heat flow is obtained.
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