PALLADIUM(PD) COATING ELECTROLYTE SOLUTION FOR HYDROGEN DELAYED FRACTURE QUALITY EVALUATION OF HIGH STRENGTH STEEL, METHOD FOR PD COATING USING THE SAME AND PLATING BATH

摘要

PURPOSE: A palladium coating electrolyte solution for hydrogen delayed fracture quality evaluation of a steel material, and a method and a plating bath for palladium coating using the same are provided to achieve excellent hydrogen release prevention characteristic compared to cadmium coating, secure data stably and reduce the risk of safety accidents. CONSTITUTION: A palladium coating electrolyte solution comprises potassium hydroxide(KOH) aqueous solution and/or sodium hydroxide(NaOH) aqueous solution, and palladium chloride(PdCl2). The concentration of PdCl2 is 0.008~0.015M. The concentration of KOH aqueous solution is 2~15M. The concentration of NaOH aqueous solution is 6~10M.