한국표면공학회지 (37권2호 86-91)
Effect of Potassium Formate, Glycine and Oxalic Acid in Sulfate Bath on Trivalent Chromium Deposition Composition and Current Efficiency
Potassium formate, Glycine, Oxalic acid가 황화물계 3가 크롬도금층의 조성과 전류효율에 미치는 영향
김만;김대영;박상언;권식철;최용;
Kim, Man;Kim, Dae-Young;Park, Sang-Eon;Kwon, Sik-Chul;Choi, Yong;
한국기계연구원 표면연구부;선문대학교 신소재생명화학공학부;
Department of Surface Engineering, Korea Institute of Machinery & Materials;Division of Advanced Materials and Bio-Chemical Engineering, Sunmoon University;
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.
Trivalent chromium;Sulfate bath;Potassium formate;Glycine;Oxalic acid;Current efficiency;
PDF