Electrochemical Corrosion and In Vitro Bioactivity of SiO2:ZrO2-Coated 316L Stainless Steel in Simulated Body Fluid

Abstract

The effect of Si:Zr ratio on the in vitro bioactivity and electrochemical corrosion behavior of SiO 2 :ZrO 2 -mixed oxide-coated 316L stainless steel (SS) was evaluated in simulated body fluid (SBF) solution for 72, 120, and 168 h. Growth of Hydroxyapatite (HAp) was accelerated when Si content in the coating was increased. The Zr content in the coating improved the corrosion resistance of 316L SS rather than accelerating the HAp growth. When the Si:Zr ratio was 50:50, the coating exhibited significant improvement in corrosion resistance as well as HAp growth. The mechanism of HAp growth was proposed based on the change in surface zeta potential values of the coatings. Potentiodynamic polarization studies revealed about 10 and 5 times reduction in corrosion current density (i corr ) values for SiO 2 :ZrO 2 (50:50)-coated 316L SS after 168 h of immersion compared to SiO 2 , ZrO 2 , and Si:Zr (70:30) coatings in SBF solutions thus confirming the superior corrosion resistance. The equivalent circuit parameters derived from electrochemical impedance spectroscopy studies further confirmed significant improvement in charge transfer resistance value even after 168 h of exposure.

Creation of Surface Alloy on Aisi 316l Stainless Steel and Application of Anti-Corrosion and Wear-Resistant Coating

“…Аустенитная нержавеющая сталь марки AISI 316L находит широкое применение в биомедицине, например, для создания протеза суставов, ортопедических винтов, костных пластин и т.д. вследствие хороших механических свойств, коррозионной устойчивости и относительно невысокой стоимости [1][2][3]. Взаимодействие поверхности медицинских имплантатов с агрессивной биологической средой человека вызывает коррозию материала, что приводит к его деградации и разрушению и, соответственно, к неблагоприятному воздействию на пациента, приводя к отторжению тканью или жидкостью вокруг него [4].…”

3D-Focused ion beam tomography and quantitative porosity evaluation of ZrO2-SiO2 composite coating; amorphous SiO2 as a porosity tailoring agent

“…According to ref. [70], ZrO2-50 mol. % SiO2 composite coating produced on 316L substrate exhibited a significant improvement in corrosion performance compared with ZrO2, SiO2 and ZrO2-70 mol.…”

Electrochemical evaluation of AZ31 Mg alloy in corrosion protection of titanium silicon oxide from Earle's solution

“…25 According to recent reports, ceramic coatings (SiO 2 , TiO 2 , Al 2 O 3 , ZrO 2 CeO 2 and mixed-oxide coatings) enhance the metallic element's properties, such as mechanical and chemical stability, and corrosion resistance. 26,27 A summary of the ceramic coatings, methods and various electrolytic concentrations and their usage in applications is described in Table 1. The anodization of Mg alloy was carried out with borate and silicate electrolytes forming a pore-like morphology and it greatly reduced the corrosion rate.…”