Selective removal of nickel from iron substrate by non-cyanide strippers

来源期刊：中国有色金属学报(英文版)2004年第3期

论文作者：李德良 吴晓芙 王淀佐 J.A.Fjnch

文章页码：599 - 602

Key words：nickel stripping; non-cyanide composition; environment-friendly technology

Abstract: A novel nickel stripper using ammonia as the key component was developed to substitute cyanide for removing nickel film from iron substrates. Its compositions are: ammonia 150 g/L, hydrogen peroxide 50 g/L, ammonium chloride 100 g/L, EDTA 7.5 g/L, copper chloride 15 g/L and glucopyrone 1.2 g/L. The optimum operating conditions are: pH 9.5-11, temperature 40-50℃and stripping time 1 h. It shows many advantages over the traditional cyanide stripper including no toxicity, mild operation, lower cost, larger holding capacity, faster stripping rate and good protection for the base metal, and can meet the technical requirements in industry.