Characterization of SiO2-TiO2 Coatings on 316l Stainless Steel Substrates

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Gutierrez Manuel; Guerra Lizangela; Bermudez Reyes Barbara; Cabriales Roberto; Reyes Luis

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Journal: Journal of Advanced Materials and Processing Year:2018 | Volume:6 | Issue:1 Page(s): 3-13

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Title

Characterization of SiO2-TiO2 Coatings on 316l Stainless Steel Substrates

Author(s)

Keywords

Nano

indentation

316L stainless steel

Sol

gel

SiO2

TiO2

Abstract

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. 12μ m 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  105 (Ω cm2) for the uncoated steel, while the coated steel showed a resistance of 3. 46  105 (Ω cm2), indicating an increase in resistance compared to the bare steel. The EIS tests showed greater resistance by the coated steel (5. 8 105 (Ω cm2)) compared with the bare steel (2. 8 105 (Ω cm2)). 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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APA: Copy

Gutierrez, Manuel, Guerra, Lizangela, Bermudez Reyes, Barbara, Cabriales, Roberto, & Reyes, Luis. (2018). Characterization of SiO2-TiO2 Coatings on 316l Stainless Steel Substrates. JOURNAL OF ADVANCED MATERIALS AND PROCESSING (JOURNAL OF MATERIALS SCIENCE), 6(1), 3-13. SID. https://sid.ir/paper/715624/en

Vancouver: Copy

Gutierrez Manuel, Guerra Lizangela, Bermudez Reyes Barbara, Cabriales Roberto, Reyes Luis. Characterization of SiO2-TiO2 Coatings on 316l Stainless Steel Substrates. JOURNAL OF ADVANCED MATERIALS AND PROCESSING (JOURNAL OF MATERIALS SCIENCE)[Internet]. 2018;6(1):3-13. Available from: https://sid.ir/paper/715624/en

IEEE: Copy

Manuel Gutierrez, Lizangela Guerra, Barbara Bermudez Reyes, Roberto Cabriales, and Luis Reyes, “Characterization of SiO2-TiO2 Coatings on 316l Stainless Steel Substrates,” JOURNAL OF ADVANCED MATERIALS AND PROCESSING (JOURNAL OF MATERIALS SCIENCE), vol. 6, no. 1, pp. 3–13, 2018, [Online]. Available: https://sid.ir/paper/715624/en

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