کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1672525 1008934 2009 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The surface chemistry of 3-mercaptopropyltrimethoxysilane films deposited on magnesium alloy AZ91
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
The surface chemistry of 3-mercaptopropyltrimethoxysilane films deposited on magnesium alloy AZ91
چکیده انگلیسی

Magnesium and its alloys have desirable physical and mechanical properties for a number of applications. Unfortunately, these materials are highly susceptible to corrosion, particularly in the presence of aqueous solutions. The purpose of this study is to develop a uniform, non-toxic surface treatment to enhance the corrosion resistance of magnesium alloys. This paper reports the influence of the coating bath parameters and alloy microstructure on the deposition of 3-mercaptopropyltrimethoxysilane (MPTS) coatings on magnesium alloy AZ91. The surface chemistry at the magnesium/MPTS interface has also been explored. The results indicate that the deposition of MPTS onto AZ91 was influenced by both the pH and MPTS concentration in the coating bath. Furthermore, scanning electron microscopy results showed that the MPTS film deposited uniformly on all phases of the magnesium alloy surface. X-ray photoelectron spectroscopy studies revealed that at the magnesium/MPTS interface, the molecules bond to the surface through the thiol group in an acid–base interaction with the Mg(OH)2 layer, whereas in the bulk of the film, the molecules are randomly oriented.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thin Solid Films - Volume 517, Issue 24, 30 October 2009, Pages 6809–6816
نویسندگان
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