TY - JOUR
T1 - Composite film formed on magnesium alloy AZ31 by chemical conversion from molybdate/phosphate/fluorinate aqueous solution toward corrosion protection
AU - Ishizaki, Takahiro
AU - Masuda, Yoshitake
AU - Teshima, Katsuya
N1 - Funding Information:
This research was partially supported by the Grant for Advanced Industrial Technology Development, New Energy and Industrial Technology Development Organization (NEDO) of Japan (no. 11B06024d ).
PY - 2013/2/25
Y1 - 2013/2/25
N2 - Anticorrosive molybdate films composed mainly of Mg(OH)2, MoO2, MoO3, and MgF2 were formed on magnesium alloy AZ31 by chemical conversion. The film had relatively compact surfaces and a thickness of approximately 800nm. The XPS studies revealed that the film contained Mg, Al, Mo, O, P, S, and F elements. The corrosion resistant performances of the films were investigated by electrochemical measurements. The potentiodynamic polarization curves showed that anodic current densities and corrosion potential of the Mo coated AZ31 were lower and more positive than those of bare AZ31. The EIS measurement and appropriate equivalent circuit models revealed that the corrosion resistance was improved.
AB - Anticorrosive molybdate films composed mainly of Mg(OH)2, MoO2, MoO3, and MgF2 were formed on magnesium alloy AZ31 by chemical conversion. The film had relatively compact surfaces and a thickness of approximately 800nm. The XPS studies revealed that the film contained Mg, Al, Mo, O, P, S, and F elements. The corrosion resistant performances of the films were investigated by electrochemical measurements. The potentiodynamic polarization curves showed that anodic current densities and corrosion potential of the Mo coated AZ31 were lower and more positive than those of bare AZ31. The EIS measurement and appropriate equivalent circuit models revealed that the corrosion resistance was improved.
KW - Chemical conversion
KW - Composite film
KW - Corrosion resistance
KW - Magnesium alloy
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U2 - 10.1016/j.surfcoat.2012.11.076
DO - 10.1016/j.surfcoat.2012.11.076
M3 - Article
AN - SCOPUS:84873267053
SN - 0257-8972
VL - 217
SP - 76
EP - 83
JO - Surface and Coatings Technology
JF - Surface and Coatings Technology
ER -