کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1472399 | 990381 | 2006 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The corrosion behaviour of Fe-15Mn-7Si-9Cr-5Ni shape memory alloy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
The corrosion behaviour of Fe-15Mn-7Si-9Cr-5Ni (mass%) shape memory alloy at 25 °C in 0.5 M H2SO4 and 3.5% NaCl solutions has been studied using potentiodynamic polarization and electrochemical impedance techniques. Three different microstructures viz., single-phase γ, γ-δ and γ-Fe5Ni3Si2, were produced by heat-treating the alloy in different equilibrium phase fields. The corrosion behaviour in 0.5 M H2SO4 solution is almost same for all three microstructures, barring a slight difference in the passivation range. Although, the passivation current in 0.5 M H2SO4, is in the same range as that of SS 304, the critical current required for onset of passivation is almost three orders higher and the passivation range is much shorter. In 3.5% NaCl solution the corrosion behaviour of all three microstructures of the Fe-15Mn-7Si-9Cr-5Ni shape memory alloy was that of general dissolution without passivity or localized attack (pitting). The best corrosion resistance in both H2SO4 and NaCl solutions is shown by the single-phase γ microstructure.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Corrosion Science - Volume 48, Issue 4, April 2006, Pages 937-949
Journal: Corrosion Science - Volume 48, Issue 4, April 2006, Pages 937-949
نویسندگان
Bikas C. Maji, C.M. Das, Madangopal Krishnan, R.K. Ray,