Influence of Silicate Concentration in Electrolyte on the Growth and Performance of Plasma Electrolytic Oxidation Coatings Prepared on Low Carbon Steel
| Autor: | Baixing Liu, Wenbin Yang, Jun Liang, Weimin Liu, Zhenjun Peng |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Carbon steel Scanning electron microscope Mechanical Engineering technology industry and agriculture macromolecular substances 02 engineering and technology Electrolyte engineering.material Plasma electrolytic oxidation 010402 general chemistry 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Silicate 0104 chemical sciences Corrosion chemistry.chemical_compound chemistry Chemical engineering Coating Mechanics of Materials engineering General Materials Science 0210 nano-technology |
| Zdroj: | Journal of Materials Engineering and Performance. 27:2345-2353 |
| ISSN: | 1544-1024 1059-9495 |
| Popis: | Plasma electrolytic oxidation (PEO) coatings were prepared on low carbon steel from electrolytes with different silicate concentrations. The microstructure, elemental and phase compositions of the PEO coatings were analyzed by scanning electron microscope, energy-dispersive spectrometer, and x-ray diffraction, respectively. The adhesion of PEO coatings with low carbon steel substrate was qualitatively examined by thermal shock tests. The tribological properties were evaluated by a reciprocating tribometer sliding against a Si3N4 ceramic ball. The corrosion behaviors of PEO coatings were investigated in 3.5 wt.% NaCl solution by electrochemical impedance spectra and potentiodynamic polarization. Results indicated that all the PEO coatings were comprised of amorphous SiO2 and Fe-containing oxides; however, the silicate concentration in electrolyte showed significant influence on the growth and the performance of PEO coatings. The PEO coating prepared from the electrolyte with silicate concentration of 30 g/L had the highest Fe content because the substrate was more readily oxidized and showed a dense structure, resulting in the best comprehensive performance of adhesion, wear resistance, and corrosion resistance. |
| Databáze: | OpenAIRE |
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