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

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 cm² of paint layer on tinplate. It is high-performance, nontoxic and safe for environment.