Method for producing a corrosion-resistant coating on the surface of lacquered workpieces

US4956196A · kind A · utility

Assignee

• Leybold GmBH · DE

Inventors

• Wolfgang Wagner · Preetz, DE
• Klemens Ruebsam · Bad Orb, DE
• Helmut Kubik · Langenselbold, DE
• Stefan Heimrich · Bad Orb, DE
• Klaus Eckert · Herbrechtingen, DE
• Werner Pflueger · Hammersbach, DE

Key dates

• Filing date: Jul 14, 1989
• Grant date: Sep 11, 1990
• Expiry date: Jul 14, 2009

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F21V7/28
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

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.