کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1471831 990362 2006 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Roles of β phase in the corrosion process of AZ91D magnesium alloy
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Roles of β phase in the corrosion process of AZ91D magnesium alloy
چکیده انگلیسی

For better understanding of the roles of β phase in the corrosion processes of AZ91D alloy, corrosion behavior of a cast (α + β phase) and a homogenized (α phase) AZ91D alloy was investigated in NaCl aqueous solution by gas collection and electrochemical measurements. According to the hydrogen evolution properties during corrosion, two different types of corrosion tend might be differentiated. For type I, hydrogen diffused into alloy, which evoked the decreasing of hydrogen evolution rate (HER) and the weakening of negative difference effect (NDE). For type II, in the corrosion process, hydrogen in the alloys diffused into the product film (P-type semiconductor), which suggested that hydrogen entering the film would be ionized. The generated electrons during ionization decreased the concentration of vacancies in the valence band of the product films, indicating an improvement of corrosion resistance of AZ91D alloy.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Corrosion Science - Volume 48, Issue 5, May 2006, Pages 1249–1264
نویسندگان
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