کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1472381 990380 2006 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Delaminated areas beneath organic coating: A local electrochemical impedance approach
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Delaminated areas beneath organic coating: A local electrochemical impedance approach
چکیده انگلیسی

Local electrochemical impedance mapping was used to investigate delamination phenomena at the steel/epoxy-vinyl primer interface. The delamination occurred from an artificial defect (cutter scribing) and from ageing in a salt spray chamber. The samples were taken from the salt spray chamber after 20, 30 and 50 days of exposure. To observe delamination after ageing, the corrosion product layers were removed by a cathodic polarization at −1.5 V/SCE for 4 h. A non-aged reference sample was tested for comparison. Mapping was performed at 5 kHz. Initiation and propagation of the delamination were clearly observed. The delaminated surface areas measured by visual observations after the removal of the coating were lower than those determined by local electrochemical impedance mapping. The delamination mechanisms were discussed with reference to literature data.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Corrosion Science - Volume 48, Issue 7, July 2006, Pages 1779–1790
نویسندگان
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