| 摘要 |
PURPOSE:To color a metallic surface under gentle conditions by dipping a stainless steel or metallic Ti into an aq. soln. contg. Co ions, permanganate ions and molybdate ions and passing slight current thereto. CONSTITUTION:Cobalt chloride, cobalt sulfate, etc. are dissolved in water. Potassium permanganate, ammonium molybdate or sodium nitrite is dissolved in water. Both solns. are mixed and the material consisting of the stainless steel or metallic Ti is dipped into the soln. mixture. The slight current of about 10-200mA/dm<2> is passed through the metal. The compd. of Co. Mn and MO deposits on the metallic surface and the desired colored film is formed thereon with good adhesiveness.
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