Calcium phosphate/polyvinyl acetate coatings on SS304 via galvanic co-deposition for orthopedic implant applications

Behavior of Calcium Phosphate–Chitosan–Collagen Composite Coating on AISI 304 for Orthopedic Applications

“…Coating morphology was also characterized after 21 days of aging in SBF. In previous studies [ 66 , 68 ], we have observed that this time is sufficient to achieve a stable behavior in the calcium-phosphate-based coatings. In both cases, the deposit covered the metallic substrates, as shown in Figure 1 e–h, with almost the same morphological characteristics described above.…”

“…Galvanic deposition was carried out in a two-compartment electrochemical cell connected via a saturated potassium chloride salt bridge. A scheme of the apparatus can be found in our previous works [ 67 , 68 , 69 , 71 ]. The electrodes were short-circuited through a copper wire.…”

“…Separately, 11.93 g of HEPES (2-(4-(2-hydroxyethyl)-1-piperazinyl)-ethanesulfonic acid) was added in 100 mL of MilliQ water at 37 °C, which afterward was mixed into the first solution. pH was kept up to 7.40 with 0.8 mL of NaOH 1.0 M. The corrosion test consisted of the monitoring of (OCP), potentiodynamic polarization (PP), and electrochemical impedance spectroscopy (EIS) in a conventional three-electrode cell with a Pt wire as the counter electrode and a 3.0 M Ag/AgCl as the reference electrode [ 65 , 66 , 67 , 68 , 69 ]. Corrosion potential (E corr ) and corrosion current density (i corr ) were calculated by extrapolation of Tafel’s curves.…”

“…This consolidated and very versatile technology is also appropriate for producing numerous materials [ 53 , 54 , 55 ] in the nanostructured form [ 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 ]. In our other previous works, CaP-based, CS-based, and composite coatings were obtained through galvanic deposition on stainless steel [ 65 , 66 , 67 , 68 , 69 ]. In these works, we have demonstrated that, among other things, galvanic deposition is also able to produce coatings with good adhesion on the substrates and a lack of cytotoxicity.…”

Evaluating the Performance of Aluminum Sacrificial Anodes with Different Concentration of Gallium in Artificial Sea Water

“…In the corrosion protective area, cathodic protection (CP) is an electrochemical technique to control the corrosion of iron and steels. This technology is applied worldwide and across several industries to protect metallic structures, including buried piping, exposed marine structures, ship hulls as well as heat exchangers [1][2][3][4][5]. It is an extremely crucial electrochemical method to protect metallic structures by connecting them to either more electrochemically active metals or by supplying negative current from an external circuit.…”