Efficient one-step fabrication of superhydrophobic nano-TiO2/TMPSi ceramic composite coating with enhanced corrosion resistance on 316L
| Autor: | Seyed Masoud Emarati, Mahdi Mozammel |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
02 engineering and technology engineering.material 01 natural sciences Corrosion Contact angle Electrophoretic deposition chemistry.chemical_compound Coating 0103 physical sciences Materials Chemistry Ceramic Composite material 010302 applied physics Nanocomposite Process Chemistry and Technology 021001 nanoscience & nanotechnology Silane Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry visual_art Ceramics and Composites visual_art.visual_art_medium engineering Wetting 0210 nano-technology |
| Zdroj: | Ceramics International. 46:1652-1661 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2019.09.137 |
| Popis: | TiO2 Nanoparticle/Trimethoxy(propyl)silane (TMPSi) ceramic composite coating was deposited on 316L steel using a one-step electrophoretic deposition (EPD) method. Silane coupling agent (TMPSi) was added to the EPD bath in different concentrations (from 0.5 to 15 vol %) to decrease the surface energy of the deposited coating. TiO2 coating is hydrophilic whereas by adding varying concentrations of TMPSi, the obtained nanocomposite coating showed much better hydrophobicity. Surface wettability was measured by water contact angle (WCA) and sliding angle (SA) tests. Moreover, the effect of TMPSi concentration was determined by comparing the WCA and SA values. Surface morphology was studied through Field Emission Scanning Electron Microscopy (FESEM), and the presence of micro/nano meter roughness on the surface was confirmed. The distribution of elements were investigated by EDS analysis in which their uniform dispersion was observed. Corrosion behavior of 316L samples before and after the coating process was studied by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) tests in 3.5 wt % NaCl solution. The polarization curve proved that the superhydrophobic ceramic nanocomposite coatings (WCA = 168° and SA = 3.1°) were able to decrease the corrosion rate of bare 316L (from 12.180 to 5.621 (μm per year)). |
| Databáze: | OpenAIRE |
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