کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1472431 990383 2005 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The nanostructure and microstructure of steels: Electrochemical Tafel behaviour and atomic force microscopy
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
The nanostructure and microstructure of steels: Electrochemical Tafel behaviour and atomic force microscopy
چکیده انگلیسی

The influence of chemical composition and heat treatment on a low-carbon steel, chromium steel and high speed steel has been examined by polarisation curves and electrochemical parameters deduced from the Tafel plots. The electrochemical corrosion resistance, which is small between the as-received steels become greater after heat treatment, following the order: carbon steel < chromium steel ∼ high speed steel. To explain these differences, the nano- and microstructure of the steels has been characterized by the ex situ techniques of atomic force microscopy and optical microscopy, before and after surface etching with Nital (a solution of 5% HNO3 in ethanol). This causes preferential attack of the ferrite phases showing the carbide phases more clearly. From these nanostructural studies it was possible to better understand why the passive films formed on chromium steel and high speed steel have superior protective properties to those formed on carbon steel.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Corrosion Science - Volume 47, Issue 12, December 2005, Pages 2871–2882
نویسندگان
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