کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1659573 1008384 2009 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Corrosion protection of AA2024 sealed anodic layers using the hydrophobic properties of carboxylic acids
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Corrosion protection of AA2024 sealed anodic layers using the hydrophobic properties of carboxylic acids
چکیده انگلیسی

The present study investigates the use of carboxylic acids as a post-treatment for sealed AA2024 anodised in tartaric–sulphuric acid electrolyte. Four monocarboxylic acids with different carbon chain lengths were tested ((CH3–(CH2)n–COOH with n = 4, 8, 12 and 16). Hydrophobic surface properties after the post-treatment were characterized by contact angle measurements. Electrochemical impedance spectroscopy (EIS) was performed to assess the ability of the four carboxylic acids to form protective films. It was shown that stearic acid (n = 16) used in its pure molten state was the most efficient. The organic film formed very rapidly (under 5 min) and contributed to the enhancement of the protection in terms of corrosion resistance of the sealed anodic layers. EIS measurements showed the presence of the organic films on the specimen surface.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface and Coatings Technology - Volume 203, Issue 22, 15 August 2009, Pages 3420–3426
نویسندگان
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