Effect of SeO 2 on corrosion resistance of micro-arc oxidation

ABSTRACTIn order to make titanium alloy implants have better corrosion resistance in the human body, selenium-containing coating was added to the surface of Ti6Al7Nb through micro-arc oxidation. The results indicate that the coating has a higher thickness and lower roughness after the addition of selenium element. XRD, SEM, and XPS analysis showed that selenium element was successfully added into the coating. Then the dynamic polarization curve and EIS indicate that the prepared samples have better corrosion resistance in SBF solution compared to the unadded samples, (icorr) and (Ecorr) are 2.695 × 10−8 A·cm−2 and 0.101 V, respectively. The addition of selenium helps to improve the biological corrosion resistance of the sample in body fluids.KEYWORDS: Micro-arc oxidationSeO2titanium alloycorrosion resistancecoatingsroughnessthicknessSBF solution Disclosure statementThe authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.Additional informationFundingThis work was supported By Open Fund(PLN2021-20 ) of State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation (Southwest Petroleum University).