کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5364315 1388314 2007 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Characterization of rare-earth conversion films formed on the AZ31 magnesium alloy and its relation with corrosion protection
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Characterization of rare-earth conversion films formed on the AZ31 magnesium alloy and its relation with corrosion protection
چکیده انگلیسی

Two pre-treatments were studied for AZ31 Mg alloy substrates, consisting of immersion in cerium nitrate and lanthanum nitrate solutions for various immersion times. The surface composition was investigated by X-ray photoelectron spectroscopy and Auger electron spectroscopy that revealed the presence of a surface film containing the rare-earth cation, with a composition which was time dependent in the case of the cerium pre-treatment.The corrosion behaviour of the pre-treated substrates in 0.005 M NaCl solutions was assessed by potentiodynamic polarization, open circuit potential monitoring and the scanning vibrating electrode technique (SVET). The electrochemical results show that the pre-treatments reduced the corrosion activity of the AZ31 Mg alloy substrates in the presence of chloride ions. The corrosion protection efficiency is dependent on the treatment time.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 253, Issue 16, 15 June 2007, Pages 6922-6931
نویسندگان
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