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인산염 피막 처리에 대한 고분자 첨가제의 영향에 관한 연구
류영철,이근대,이회근,김종래 釜山工業大學校 1995 論文集 Vol.37 No.-
The effect of additive on phosphate coating was investigated. It was shown that the optimum concentration of accelerator is 2g/ℓ. The lower concentration resulted in coarse crystalline coating, whereas higher concentration of accelerator suppressed the reaction. In the case of Ca addition, the Zn/Ca ratio of 6.67 in phosphating solution revealed the highest efficiency in coating process. When polyaniline(PANI) is introduced into phosphating solution, it reduced both coating weight and weight of substrate dissolved during phosphating. The incorporation of PANI in the bath also affected composition and surface tension of phosphate coating. High concentration of PANI resulted in decrease in surface tension and increase in content of Fe in phosphating coating. The electrocoated paint film on PANI-modified phosphated coating showed marked improvement in distensibility compared to that on unmodified phosphated coating.