Method for producing a corrosion-resistant coating on the surface of lacquered workpieces
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United States of America Patent
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Sep 11, 1990
Issued Date -
N/A
app pub date -
Jul 14, 1989
filing date -
Sep 21, 1987
priority date (Note) -
Expired
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Abstract
In a method and in an apparatus for the production of a corrosion-resistant coating of high reflectivity on the surface of workpieces, especially reflector inserts formed from plastic, in a vacuum chamber with a glow-discharge cathode and an evaporator, there is deposited on a coating consisting of a protective lacquer a second coating of a polymer, preferably of hexadimethylsilane, then a third coating of a metal, preferably aluminum, and lastly a fourth coating of a polymer, preferably of hexadimethylsilane. Both the metal evaporation and the polymerization of the protective coatings on the reflective coating and on the lacquer coating are performed in the same vacuum chamber.
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