کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1470050 1510041 2012 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of microstructure evolution on corrosion of different crystal surfaces of AZ31 Mg alloy in a chloride containing solution
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Effect of microstructure evolution on corrosion of different crystal surfaces of AZ31 Mg alloy in a chloride containing solution
چکیده انگلیسی

The crystallographic basal plane dominated rolling surface (RS) of AZ31 Mg alloy has higher corrosion resistance in a chloride containing solution than its prismatic plane dominated cross-section surface (CS). The microstructures of these two surfaces with different crystallographic orientations evolve at 450 °C, resulting in larger grains, less twins, and more Al8Mn5 particles. Among these changes, the precipitated Al8Mn5 intermetallic phase during heat-treatment is responsible for the reduced corrosion resistance of the RS and CS surfaces. The electrochemical galvanic effect of the intermetallic particles suppresses the influence of crystallographic orientation and leads to a diminished difference in corrosion behavior between the RS and CS surfaces.


► We measure different corrosion rates of AZ31 rolling and cross-section surfaces.
► We measure increased corrosion rates of AZ31 after heat-treatment.
► The corrosion rate difference of these two surfaces decreases after heat-treatment.
► Grain orientations are responsible for different corrosion behavior of the surfaces.
► The growth of intermetallic particles deteriorates the corrosion performance.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Corrosion Science - Volume 54, January 2012, Pages 97–105
نویسندگان
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