In this work, the galvanic deposition method is used to deposit coatings of brushite/hydroxyapatite/polyvinyl acetate on 304 stainless steel. Coatings are obtained at different temperatures and with different sacrificial anodes, consisting of a mixture of brushite and hydroxyapatite. Samples are aged in a simulated body fluid (SBF), where a complete conversion of brushite into hydroxyapatite with a simultaneous change in morphology and wettability occurred. The corrosion tests show that, compared with bare 304, the coating shifts Ecorr to anodic values and reduces icorr Ecorr, and icorr has different values at different aging times due to chemical interactions at the solid/liquid interface. The best performing deposits are those obtained by using Al as the sacrificial anode. The metal ion release, measured after 21 days of aging, is very low and is attributable to the presence of a coating that slows the steel corrosion. Coating cytotoxicity is investigated through cell viability assays with MC3T3-E1 osteoblastic cells. The results reveal a high cytocompatibility comparable to that of a pure cell culture medium.

Mendolia I., Zanca C., Ganci F., Conoscenti G., Carfì Pavia Francesco, Brucato V., et al. (2021). Calcium phosphate/polyvinyl acetate coatings on SS304 via galvanic co-deposition for orthopedic implant applications. SURFACE & COATINGS TECHNOLOGY, 408 [10.1016/j.surfcoat.2020.126771].

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

Mendolia I.;Zanca C.;Ganci F.;Conoscenti G.;Carfì Pavia Francesco;Brucato V.;La Carrubba V.;Lopresti F.;Piazza S.;Sunseri C.;Inguanta R.
2021

Abstract

In this work, the galvanic deposition method is used to deposit coatings of brushite/hydroxyapatite/polyvinyl acetate on 304 stainless steel. Coatings are obtained at different temperatures and with different sacrificial anodes, consisting of a mixture of brushite and hydroxyapatite. Samples are aged in a simulated body fluid (SBF), where a complete conversion of brushite into hydroxyapatite with a simultaneous change in morphology and wettability occurred. The corrosion tests show that, compared with bare 304, the coating shifts Ecorr to anodic values and reduces icorr Ecorr, and icorr has different values at different aging times due to chemical interactions at the solid/liquid interface. The best performing deposits are those obtained by using Al as the sacrificial anode. The metal ion release, measured after 21 days of aging, is very low and is attributable to the presence of a coating that slows the steel corrosion. Coating cytotoxicity is investigated through cell viability assays with MC3T3-E1 osteoblastic cells. The results reveal a high cytocompatibility comparable to that of a pure cell culture medium.
Settore ING-IND/23 - Chimica Fisica Applicata
Settore ING-IND/34 - Bioingegneria Industriale
Settore ING-IND/24 - Principi Di Ingegneria Chimica
Mendolia I., Zanca C., Ganci F., Conoscenti G., Carfì Pavia Francesco, Brucato V., et al. (2021). Calcium phosphate/polyvinyl acetate coatings on SS304 via galvanic co-deposition for orthopedic implant applications. SURFACE & COATINGS TECHNOLOGY, 408 [10.1016/j.surfcoat.2020.126771].
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10447/473058
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