Fabrication of hydroxyapatite/stearic acid composite coating and corrosion behavior of coated magnesium alloy

Atmospheric plasma sprayed silica–hydroxyapatite coatings on magnesium alloy substrates

“…Calcium phosphates represent a big promise for they can be used as biomedical coatings on magnesium substrates [16]. The literature of the last couple of years enumerates several methods for hydroxyapatite deposition on magnesium/Mg alloys: sol-gel coating [17], electrodeposition [18,19], a cathodic arc PVD technique [20], chemical solution deposition [21][22][23], dipping and immersion [24,25], cold spray deposition [26], plasma electrolytic oxidation [27,28], and a transonic particle acceleration deposition process [29]. However, the available literature presenting hydroxyapatite coatings deposition with atmospheric plasma spraying on magnesium alloy substrates is incomplete.…”

Optimized Electrodeposition Concentrations for Hydroxyapatite Coatings on CoCrMo biomedical alloys by computational techniques

“…Upon investigating, we can see that a significant increase in phase angle with increase of phosphate concentration, especially above 0.02 M. It is suggested that after a critical value of phosphate molarities, hydroxyapatite formation increases significantly, resulting effect of H 2 O 2 concentration more important. It is reported in recent studies positive effect of H 2 O 2 on the homogenous hydroxyapatite formation [7,9,25,26]. On the contrary, increases in H 2 O 2 concentration did now show a considerable effect in phase angle.…”

“…It is known that Ca/P ratio in hydroxyapatite molecule is 1.6. Many researchers use electrolyte concentrations with a ratio of Ca/P: 1.6 to provide hydroxyapatite formation [9,[21][22][23][24][25]. For synthesis of an ideal hydroxyapatite molecule, it is clear that Ca +2 affect the coating more than P À ions in solution.…”

“…electric double layer capacity and charge transfer resistance, respectively. R p is inversely proportional to the corrosion current density i corr and, mostly can be accepted as a measure of corrosion resistance [9,25]. Values of the circuit elements are calculated by Zview software according to fitted graph given in Table 6.…”

Statistical optimization of microencapsulation process for coating of magnesium particles with Viton polymer

“…The adsorption of polymer onto the surface of particles is including a Lewis acid-base interaction (i.e., electron pair donor and acceptor function) which carried out between the particle surface and the coating agent molecule [10]. In order to access chemical composition of the bulk powder, the utilized technique for coating and type of polymer are critical and these factors might have a major role in the surface properties of the resulted powder [11][12][13].…”