Electrochemically Deposited Calcium Phosphate Coatings Using a Potentiostat of In-house Design and Implementation

Abstract

The effect of growth conditions and post treatments on the properties of calcium phosphate films electrodeposited by a potentiostat of the authors' design and construction is presented. The electrolyte used was formed with 0.025 M (NH 4 )H 2 PO 4 and 0.042 M Ca(NO 3 ) 2 .4H 2 O, and its pH was kept at 5. A voltametric analysis was performed to determine the necessary potential values to obtain the films. Additionally, the temperature of the electrolyte was varied to determine its influence on the properties of the deposited films. The films were characterized by Fourier transform infrared spectroscopy, X-ray diffraction and scanning electron microscopy. The films deposited at -1.4 V and -1.7 V present the brushite phase. The thermal post-treatment favored the formation of octagonal calcium phosphate in amorphous phase, while the basic treatment provided the OH-groups necessary for the formation of hydroxyapatite. The low cost potentiostat implemented presents excellent characteristics for obtaining films with similar characteristics to those obtained with a conventional potentiostat.

Bioactive Calcium Phosphate Coatings for Bone Implant Applications: A Review

“…The first experiments typically used direct current, but pulsed current electrodeposition has become more usual in the most recent years. The break times are used to remove the H 2 bubbles and to homogenize the electrolyte concentrations [162][163][164][165][166].…”

Galvanic Deposition of Calcium Phosphate/Bioglass Composite Coating on AISI 316L

“…Calcium phosphates are another class of ceramic materials that have been successfully applied in the biomedical field [37,38]. In contrast to Bioglass, calcium phosphate compounds allow for the osteoconduction of pre-differentiated bone cells [21,[39][40][41].…”