Paper Title:
Influence of Additive on Structure and Corrosion Resistance of Manganese Phosphate Film on AZ91 Magnesium Alloy
  Abstract

Manganese phosphate conversion coating was prepared by adding addition agent towards phosphate bath. The structure was investigated using SEM/EDX, and the anti-corrosion performance was evaluated by electrochemical technique. It was found that the film presented in crystal structure, and the crystalloid grain transformed from large grain toward small particles upon the addition. The corrosion resistance was studied by polarization curves and EIS in 3.5%NaCl. Polarization curves showed that the corrosion potential of the coating shifted remarkably towards positive direction comparing with that of AZ91 substrate. EIS results indicated that the radius of the capacity impedance for phosphate film increased distinctly, which validated the excellent anti-corrosion performance of the film.

  Info
Periodical
Edited by
Yafang Han, Fusheng Pan, Jianmao Tang, Chungen Zhou
Pages
176-180
DOI
10.4028/www.scientific.net/MSF.686.176
Citation
W. Q. Zhou, W. Tang, Q. Zhao, S. W. Wu, E. H. Han, "Influence of Additive on Structure and Corrosion Resistance of Manganese Phosphate Film on AZ91 Magnesium Alloy", Materials Science Forum, Vol. 686, pp. 176-180, 2011
Online since
June 2011
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$32.00
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