کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1469874 | 1510039 | 2012 | 11 صفحه PDF | دانلود رایگان |
For corrosion protection of 55% Al–Zn-coated steel, a dense polypyrrole (PPy) film is electrochemically formed on 55% Al–Zn-coated steel in an acidic tartrate solution under constant current control. The film potentially consists of an inner layer of aluminium and/or zinc oxide and an outer PPy layer doped with tartrate anions. The PPy layer can maintain passivation of 55% Al–Zn-coated steel in a 3.5 wt.% NaCl aqueous solution and protected the steel for several hours. The doping of molybdate anions into the PPy–tartrate film greatly improved the film’s protective properties.
► A conducting polypyrrole (PPy) layer was anodically formed to protect Al–Zn alloy coating.
► The alloy−coated steel can be passivated by the oxidative PPy layer.
► No corrosion products were observed during 60 h immersion in aqueous NaCl solution.
Journal: Corrosion Science - Volume 56, March 2012, Pages 67–77