SURFACE TREATMENT PROCESS FOR COLORING METAL ARTICLES

• Main Authors: LI ZHI-MIN, LIN CHIH-PEN, XIE ZHENG-GANG, XIONG GUO-YOU, ZHENG HUA-JIE, LUO XIAN-FENG
• Format: Patent
• Language: English
• Published: 03.07.2008
• Subjects: ADHESIVES; APPARATUS THEREFOR; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; ATOMISING APPARATUS; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; CORRECTING FLUIDS; DYES; ELECTROFORMING; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; FILLING PASTES; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; INKS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NOZZLES; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PERFORMING OPERATIONS; POLISHES; PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS; SPRAYING APPARATUS; SPRAYING OR ATOMISING IN GENERAL; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TRANSPORTING; USE OF MATERIALS THEREFOR; WOODSTAINS

A surface treatment process for coloring metal articles includes following steps. Firstly, a metal article with a surface including a first surface portion and a second surface portion is provided. Secondly, a releasable coating is formed onto the first surface portion of the metal article. Thirdly, a first electro-depositable coating is applied onto the second surface portion of the metal article by means of a first electro-coat process. Fourthly, the releasable coating is removed from the first surface portion of the metal article. Finally, a second electro-depositable coating having a color different from that of the first electro-depositable coating is applied onto the first surface portion of the metal article by means of a second electro-coat process.