کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8023298 1517533 2018 50 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Oxidation and corrosion behavior of commercial 5 wt% Al-Zn coated steel during austenitization heat treatment
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Oxidation and corrosion behavior of commercial 5 wt% Al-Zn coated steel during austenitization heat treatment
چکیده انگلیسی
A commercial 5 wt% Al-Zn coated steel was employed to detail the microstructural evolution, oxidation, and the related corrosion behavior changes during the austenitization heat treatment. During the early stages of austenitization, Fe2Al5Znx phase forms between the coating and the steel substrate. With continued austenitization, the inner part of the coating transforms to the Γ-Fe3Zn10 phase and the outer part of the coating to the FeAl phase, accompanying with the formation of a thin surface oxide layer mainly composed of Al2O3 with minor ZnO. Subsequently, the coating transforms to the Γ-Fe3Zn10 phase and α-Fe(Zn), and finally to the single α-Fe(Zn) phase. The Al in the coating is distributed mainly on the surface of the alloy layer and suppresses the oxidation of the alloy layer. The austenitization treatment enriches the coating with Fe, which, in turn, ennobles the corrosion potential and reduces the corrosion current density of the coating. Conversely, the potential difference between the coating and the steel substrate is reduced after austenitization.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface and Coatings Technology - Volume 350, 25 September 2018, Pages 880-889
نویسندگان
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