Corrosion Protection of Pure Titanium Implant by Electrochemical Deposition of Hydroxyapatite Post-Anodizing.

2nd International Scientific Conference (Pure Sciences, Brilliant Creativity and Renewed Building)

Almashhadani, Haider Abdulkareem^1 ; Saleh, Khulood Abed^1

Department of Chem., College of Science, Baghdad University, Jaderyah, Baghdad, Iraq^1

关键词: Artificial saliva;    Corrosion reaction;    Electrochemical deposition process;    Hydroxyapatite coating;    Preexponential factor;    Protection efficiency;    Thermodynamic values;    Titanium implants;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/571/1/012071/pdf
DOI  :  10.1088/1757-899X/571/1/012071

来源: IOP

【 摘 要 】

In this study, a Hydroxyapatite (HA) coating was prepared on a titanium implant by an electrochemical deposition process. The titanium pre-treatment by anodizing in 1.65 mol/L sulfuric acid with (10V) at room temperature. The deposition was all conducted at a constant voltage of 6.0 V, for 1 h at room temperature. The coatings thus prepared were characterized with Fourier transform infrared spectroscopy (FTIR) and thickness of the coated layer. The electrochemical deposition of HA occurred on the titanium as a cathode. Coated titanium by HA after anodizing revealed a good corrosion protection efficiency even at a temperature ranged (293-323) K in artificial saliva. Activation energy and pre-exponential factor (kinetic parameters) were calculated and discussed. Also, thermodynamic values ΔG and ΔH were calculated and it shows that corrosion reaction was non-spontaneous and exothermic in nature before treatment but after anodizing the corrosion reaction become endothermic.