کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7896637 1510022 2013 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Estimation of residual corrosion rates of steel under cathodic protection in soils via voltammetry
ترجمه فارسی عنوان
برآورد میزان خوردگی باقی مانده فولاد در اثر حفاظت کاتدیک در خاک از طریق ولتامتری
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
چکیده انگلیسی
Steel coupons were buried in soil for 2 months under cathodic protection. Their residual corrosion rates were deduced from voltammetry and weight loss measurements. In aerated soils, the current density due to O2 reduction, jK,O2, was modelled with a mixed activation-diffusion controlled kinetic. The anodic part jA of the current density j, computed as jA = j − jK,O2, obeyed Tafel law. Its extrapolation to the protection potential gave a corrosion rate (∼7 μm yr−1) consistent with that obtained from weight loss measurements. With a deficient protection, corrosion rates remained at ∼80 μm yr−1, a value given by both methods.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Corrosion Science - Volume 73, August 2013, Pages 222-229
نویسندگان
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