کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1442108 1509422 2012 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electropolymerised polyaniline films as effective replacement of carcinogenic chromate treatments for corrosion protection of aluminium alloys
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد بیومتریال
پیش نمایش صفحه اول مقاله
Electropolymerised polyaniline films as effective replacement of carcinogenic chromate treatments for corrosion protection of aluminium alloys
چکیده انگلیسی

Owing to the carcinogenic nature of chromate coatings, alternate coatings with intrinsically conducting polymers such as polyaniline (PANI) and polypyrrole (Ppy) have been developed. Hence a study has been made on the effect of electropolymerised PANI films on corrosion protection performance of epoxy coating on AA 2024 and AA 7075 aluminium alloys. Polyaniline was electropolymerised on both the alloys by galvanostatic method. A post treatment of cecrium was given to seal the pinholes of PANI film. Epoxy coating was applied over these films and their corrosion protection performance was found out by EIS studies in 3% NaCl and salt spray test. EIS studies have shown that the coating resistance (Rc) of PANI with the epoxy coated aluminium alloys has remained above 106 Ω cm2 whereas the alloys coated with epoxy alone have shown the Rc values less than 104 Ω cm2. Besides, the salt spray tests showed a better corrosion protection of PANI with epoxy coated aluminium alloys.


► Electrosynthesis of PANI on AA 2024 and AA 7075 achieved by galvanostatic method.
► FTIR studies show both benzenoid and quinoid groups and doped with oxalate ions.
► The salt spray tests and EIS studies show better corrosion protection by PANI.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Synthetic Metals - Volume 162, Issues 5–6, April 2012, Pages 536–542
نویسندگان
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