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Characterization of Sio2-Tio2 Coatings on 316l Stainless Steel Substrates
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نویسنده
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Gutierrez Manuel ,Guerra Lizangela ,Bermudez-Reyes Barbara ,Cabriales Roberto ,Reyes Luis
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منبع
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Journal Of Advanced Materials And Processing - 2018 - دوره : 6 - شماره : 1 - صفحه:3 -13
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چکیده
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This paper reports nano-structured sio2-tio2 coatings using the sol-gel technique on 316l steel substrates. nanoindentation, surface analysis and corrosion resistance tests were performed on different samples. the nanomechanical tests allowed to compare the uncoated steel samples (eavg = 193.24gpa and the mean hardness of 2.63gpa and coated steel samples (eavg = 287.38gpa and mean hardness of 5.74gpa), resulting in an improvement of the resistance and modulus of elasticity of the coated steel substrates. from a surface analysis an average thickness of 1.12μm was obtained in the coated samples, presenting a dense and consolidated coating. polarization resistance (pr) and electrochemical impedance spectroscopy (eis) tests were performed. the pr tests showed a resistance of 2.11 × 10^5 (ω cm^2) for the uncoated steel, while the coated steel showed a resistance of 3.46 × 10^5 (ω cm^2), indicating an increase in resistance compared to the bare steel. the eis tests showed greater resistance by the coated steel (5.8× 10^5 (ω cm^2)) compared with the bare steel (2.8× 10^5 (ω cm^2)). the effects of the electrolyte in both conditions were observed by sem after immersion for 24 h, showing pitting by the bare steel and good protection by the coated steel.
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کلیدواژه
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Nano-Indentation ,316l Stainless Steel ,Sol- Gel ,Sio2-Tio2
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آدرس
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Universidad Autónoma De Nuevo León, Facultad De Ingeniería Mecánica Y Eléctrica, Centro De Investigación E Innovación En Ingeniería Aeronáutica, México, Universidad Autónoma De Nuevo León, Facultad De Ingeniería Mecánica Y Eléctrica, Centro De Investigación E Innovación En Ingeniería Aeronáutica, México, Universidad Autónoma De Nuevo León, Facultad De Ingeniería Mecánica Y Eléctrica, Centro De Investigación E Innovación En Ingeniería Aeronáutica, México, Universidad Autónoma De Nuevo León, Facultad De Ingeniería Mecánica Y Eléctrica, Centro De Investigación E Innovación En Ingeniería Aeronáutica, México, Universidad Autónoma De Nuevo León, Facultad De Ingeniería Mecánica Y Eléctrica, Centro De Investigación E Innovación En Ingeniería Aeronáutica, México
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پست الکترونیکی
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luis.reyessr@uanl.edu.mx
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Authors
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