脱除马口铁表面漆层的无机碱性脱漆剂

A new kind of high-performance alkaline paint stripper for tinplate

研制了一种新型碱性脱漆剂．该脱漆剂以氢氧化钠水溶液为主体系，其中氢氧化钠的质量浓度为90～100g·L^-1，溴化十六烷基三甲基胺（CTMAB）的质量浓度为10g·L^-1，柠檬酸钠的质量浓度10g·L^-1，甘油的质量浓度为10g·L^-1．在95℃使用该脱漆剂浸泡20min左右即可完全脱除马口铁表面漆膜，且不侵蚀金属镀锡层，锡的回收率大于99％．探讨了该脱漆剂的脱漆机理．脱漆实验结果表明：本脱漆剂可以循环使用，10mL脱漆剂可以脱除200cm^2以上的漆层．该方法高效、无毒、使用安全、环境友好．

A new kind of alkaline paint stripper was prepared for tinplate. The mass concentrations of sodium hydroxide, cetyhrimethyl ammonium bromide （CTMAB）, sodium citrate and glycerin in the aqueous stripper are 90-100 ·L^-1, 10 ·L^-1, 10 ·L^-1 and 10 ·L^-1, respectively. The paint could totally be removed from tinplate when it was placed in the stripper at 95 ℃ for about 20 rain, There was no notable corrosion happened, and the recovery of tin was above 99 %. The mechanism of paint removal was discussed. The result shows that the stripper can be reused, and 10 mL of the stripper can remove 200 cm62 of paint layer on tinplate. It is high-performance, nontoxic and safe for environment.