Preparation and Characterization of Titanate-Phosphate Passivation Film on Tinplate

doi:10.13208/j.electrochem.170442

Abstract

Abstract: A passivation film was prepared on tinplate surface with a composite passivating agent made of titanate and phosphate. The surface morphologies, chemical compositions and corrosion resistances of the passivation films were characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), salt spray test, Tafel polarization measurement and electrochemical impedance spectroscopy (EIS). The results were compared with those films untreated and treated with titanate or phosphate passivation. It was shown that the titanate and phosphate passivation film was mainly composed of Ti₃(PO₄)₄·nH₂O and TiO₂. The finely crystallized surface could seal holes, therefore, a good passivation performance on tinplates could be achieved.

Key words: tin plating, titanium salt, phosphate, Cr free passivation, corrosion resistance

CLC Number:

TQ153.11

WANG Zi-yu，WANG Ming-hao，LI De-yu，LI Ning. Preparation and Characterization of Titanate-Phosphate Passivation Film on Tinplate[J]. Journal of Electrochemistry, 2018, 24(1): 13-19.

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