Evolution of corrosion resistance and passive film properties of Ni-Mo alloy coatings during exposure to 0.5 M NaCl solution
Agnieszka Laszczyńska , Włodzimierz Tylus , Juliusz Winiarski , Irena Szczygieł
AbstractThe corrosion properties of Ni-Mo alloy coatings with different molybdenum content (11–32 wt%) were investigated in the course of exposure to 0.5 M NaCl solution. Polarization resistance and impedance measurements showed that after contact with corrosive media, the formation of passive film on the coating surface, determines the corrosion resistance of Ni-Mo alloys. XPS analysis revealed that, the passive film growth was enhanced by the presence of higher amounts (26–28 wt%) of Mo in the coating. It was found, that after exposure to corrosive solution, Mo oxides occurred at the passive film/metal interface, while Ni hydroxide dominated in the bulk of the passive film.
|Journal series||Surface and Coatings Technology, ISSN 0257-8972, (A 35 pkt)|
|Publication size in sheets||0.55|
|Keywords in English||Ni-Mo alloy, Electrodeposition, XPS, Passive film, LPR, EIS|
|Publication indicators||= 15; = 14|
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