Potassium formate, Glycine, Oxalic acid가 황화물계 3가 크롬도금층의 조성과 전류효율에 미치는 영향
Effect of Potassium Formate, Glycine and Oxalic Acid in Sulfate Bath on Trivalent Chromium Deposition Composition and Current Efficiency
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Abstract
Effect of potassium formate, glycine and oxalic acid in a sulfate solution on the deposit composition and current efficiency of trivalent chromium plating was studied. The trivalent chromium layers prepared by solutions with potassium formate, glycine and oxalic acid contain a few carbon inside. The solutions containing potassium formate, glycine and oxalic acid are relatively stable with pH change. The solution with the potassium formate shows 6-30% current efficiency with current density, whereas, the solutions with oxalic acid and glycine show about 5% current efficiency, respectively. The improved current efficiency is related to enough supply of chromium ions to the electrode due to the increase of pH at the front of electrode.
참고문헌 (3)
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