کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
189650 459683 2011 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A comparative study on the corrosion behavior of porous and dense NiTi shape memory alloys in NaCl solution
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
A comparative study on the corrosion behavior of porous and dense NiTi shape memory alloys in NaCl solution
چکیده انگلیسی

The corrosion behaviors of porous and dense NiTi shape memory alloys with the same nominal composition were investigated in a 0.9% aqueous NaCl solution using electrochemical methods. The study clarified the role of the porous structure in influencing the corrosion behavior of the porous NiTi alloys, which exhibited porosity values ranging from 35.5% to 63.8%. The results indicated that the porous NiTi alloy was more susceptible to localized corrosion than was the dense NiTi alloy. However, the porous NiTi alloy sample with a higher porosity did not suffer more serious corrosion than the one with a lower porosity. Furthermore, the potential distribution exists on the pore wall of the porous NiTi alloys as a result of current flow within the pore electrolyte. Thus, the role of potential distribution inside the pore and porous structure in the corrosion behavior of the porous NiTi alloys is an important factor.


► Corrosion behaviors of porous and dense NiTi alloys were systematically compared.
► Non-uniform potential distribution within porous electrodes aggravates localized corrosion.
► Improvement of pores interconnection can help reduce localized corrosion.
► Corrosion behaviors are dominated by combined action of pore structure characteristics.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 56, Issue 18, 15 July 2011, Pages 6389–6396
نویسندگان
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