کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1548141 997722 2014 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The enhanced corrosion resistance of UMAO coatings on Mg by silane treatment
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
The enhanced corrosion resistance of UMAO coatings on Mg by silane treatment
چکیده انگلیسی

The surface silanization was carried out on ultrasonic micro-arc oxidation (UMAO) coatings on pure magnesium using KH550 as silane coupling agent (SCA). The surface morphology, chemical bonds and corrosion resistance of the silane films were investigated by scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FTIR) and electrochemical workstation, respectively. The results showed that hybrid coatings were successfully prepared on pure magnesium by UMAO-NaOH (1 mol/L, 2 mol/L, 3 mol/L)-SCA processing. The organic films with Si–O–Mg bonds are helpful for the reduction of the pores in UMAO coatings. The pores decreased with increasing NaOH concentration. Compared with single UMAO treatment, the corrosion potentials (Ecorr) of magnesium plates with UMAO-NaOH (1 mol/L, 2 mol/L, 3 mol/L)-SCA treatment increased by 29 mV, 53 mV and 75 mV, respectively, meanwhile the corrosion current density (Icorr) reduced one to two orders of magnitude. It indicated that the corrosion resistance of the coatings was improved by silane treatment.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Progress in Natural Science: Materials International - Volume 24, Issue 5, October 2014, Pages 486–491
نویسندگان
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