کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
693648 889894 2008 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Plasma interface engineered coating systems for magnesium alloys
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
Plasma interface engineered coating systems for magnesium alloys
چکیده انگلیسی

In this study, a dc low-temperature plasma technique, including plasma treatment and plasma polymerization, was used to create interface engineered coating systems with a structure of Mg/plasma interlayer/cathodic electrocoating (E-coat) for machined AZ31B magnesium (Mg) alloy panels. The plasma interlayer deposited from trimethylsilane (TMS) precursor had a nano-scale thickness of ∼65 nm and well-controlled surface properties through subsequent plasma treatments in order to achieve different level of interfacial adhesion between the E-coat and the Mg substrates. The surface wettability of the plasma interlayer was monitored by water surface contact angle measurement. The interface adhesion of the coating system was evaluated using N-methylpyrrolidinone (NMP) paint removal test and ASTM tape test conducted under dry and wet conditions. Electrochemical impedance spectroscopy (EIS) was employed to investigate the effects of plasma interlayer properties including surface wettability and adhesion enhancement on corrosion protection properties of the coating systems. It was found that a more wettable interface enhanced the electrolyte penetration through the coating and thus reduced the corrosion resistance of the coating system. On the other hands, the improved interface adhesion had little effects on EIS results mainly due to the high chemical reactivity of the Mg alloy substrates.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Progress in Organic Coatings - Volume 61, Issue 1, January 2008, Pages 28–37
نویسندگان
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