STAINLESS STEEL FOR COLORING AND COLORING METHOD OF STAINLESS STEEL

PURPOSE:To form a colored coating film having homogeneous color tone on the surface of stainless steel. CONSTITUTION:The stainless steel is dipped into a solution mainly cotaining a chromate and sulfuric acid, and a potential in the region of passive state and a potential in the region of over passi...

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Hauptverfasser:	FUKUMOTO HIROMITSU, TAKAHASHI KAZUHIKO, SETO KATSUMI, TAKATSU KIYOSHI
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS THEREFOR CHEMISTRY ELECTROFORMING ELECTROLYTIC OR ELECTROPHORETIC PROCESSES METALLURGY PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS
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Beschreibung
Zusammenfassung:	PURPOSE:To form a colored coating film having homogeneous color tone on the surface of stainless steel. CONSTITUTION:The stainless steel is dipped into a solution mainly cotaining a chromate and sulfuric acid, and a potential in the region of passive state and a potential in the region of over passive state are alternately impressed on the stainless steel as a pulse. Next, the stainless steel is colored by inko method (refer to No.52-3261 of Japan patent gazetle) and hardened. On the surface of the stainless steel after colored, the coating film having >=10atom% C content of the surface and Fe/Cr of