The surface chemistry of 3-mercaptopropyltrimethoxysilane films deposited on magnesium alloy AZ91

作者: A. Scott , J.E. Gray-Munro

DOI: 10.1016/J.TSF.2009.05.044

关键词: MicrostructureChemical engineeringAlloyMineralogyThin filmMagnesiumCoatingMaterials scienceCorrosionMagnesium alloyX-ray photoelectron spectroscopy

摘要: abstract Article history:Received 1 October 2007Received in revised form 22 May 2009Accepted 26 2009Available online 2 June 2009Keywords:Magnesium alloyOrganosilaneX-ray photoelectron spectroscopyATR-FTIRInfrared Magnesium and its alloys have desirable physical mechanical properties for a number of applications.Unfortunately, these materials are highly susceptible to corrosion, particularly the presence aqueoussolutions. The purpose this study is develop uniform, non-toxic surface treatment enhance thecorrosion resistance magnesium alloys. This paper reports influence coating bath parametersand alloy microstructure on deposition 3-mercaptopropyltrimethoxysilane (MPTS) coatings onmagnesium AZ91. chemistry at magnesium/MPTS interface has also been explored. Theresults indicate that MPTS onto AZ91 was influenced by both pH MPTSconcentration bath. Furthermore, scanning electron microscopy results showed MPTSfilm deposited uniformly all phases surface. X-ray spectroscopystudies revealed interface, molecules bond through thiolgroup an acid–base interaction with Mg(OH)

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