Obtaining and characterization of PEO layers prepared on CP-Ti in sodium dihydrogen phosphate dihydrate acidic electrolyte solution

SURFACE & COATINGS TECHNOLOGY

卷:375

Article

Malinovschi, V¹  Marin, A.^2,7  Andrei, V³  Coaca, E.²  Mihailescu, C. N.⁴  Lungu, Cristian P.⁴  Radulescu, Cristiana^5,6  Dulama, Ioana Daniela⁵ 

[1] Univ Pitesti, Targul Din Vale 1, Arges 110040, Romania

[2] Inst Nucl Res Pitesti, Str Campului 1,POB 78, Mioveni, Arges, Romania

[3] ELSSA Lab SRL, Str Crinului 26, Pitesti 110109, Arges, Romania

[4] Natl Inst Lasers Plasma & Radiat Phys, Str Atomistilor 409, Magurele 077125, Romania

[5] Valahia Univ Targoviste, Inst Multidisciplinary Res Sci & Technol, Targoviste 130004, Romania

[6] Valahia Univ Targoviste, Fac Sci & Arts, Targoviste 130004, Romania

[7] Max Planck Inst Plasma Phys, Boltzmannstr 2, D-85748 Garching, Germany

关键词: Plasma electrolytic oxidation;    CP-Ti;    Titanium dioxide layer;    Hardness/adhesion;    Corrosion resistance;    Microstructure;    Incorporation of P;   

DOI  :  10.1016/j.surfcoat.2019.07.034

来源: Elsevier

【 摘 要 】

Phosphorus-incorporated oxide layers were grown on commercially pure titanium during plasma electrolytic oxidation in sodium dihydrogen phosphate dihydrate solution. Microstructure, mechanical and electrochemical behavior of the surface oxides indicated a dominant anatase and rutile structure of TiO2 with nanocrystallites ranging from 45 to 64 nm and 48-98 rim, respectively as well as Ti2+, Ti3+ and Ti4+ chemical species. Using a combination of process time, applied current and electrolyte concentration, coating thicknesses up to about 10 gm were fabricated. Best mechanical performance was observed for potentiostatic deposited samples yielding a 453 HV 300 hardness, 19 N adhesive failure and 38 N full delamination resistance. All PEO-coated samples in this work exhibit a corrosion current density with one order of magnitude lower than CP-Ti when subjected to Ringer's physiological solution.

【 授权许可】

Free