Method for passivating a metal surface

US9771652B2 · kind B2 · utility

Assignee

• Plasmatreat GmbH · DE

Inventors

• Christian Buske · Bielefeld, DE
• Maria Carmen Artal Lahoz · Berga, ES
• Andres Escartin Barduzal · Berga, ES
• Francisco Javier Ester Sola · Zaragoza, ES
• Francisco Javier Marco Lostao · Berga, ES
• Elena Martinez Solanas · Berga, ES
• Jose Ignacio Pena Torre · Berga, ES
• Fernando Planas Layunta · Berga, ES

Key dates

• Filing date: Mar 25, 2013
• Grant date: Sep 26, 2017
• Expiry date: Dec 18, 2033

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C23C22/76
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A method for passivating a metal surface including, generating an atmospheric plasma beam by electrical discharge in a working gas, introducing an acid-containing passivating agent into the plasma beam, applying the plasma beam containing the passivating agent to the metal surface, and depositing a passivating salt on the metal surface by a reaction between the acid-containing passivating agent and the metal surface. This method simplifies the process for passivating a metal surface and renders it more effective.