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

6533b7d4fe1ef96bd1261ea8

RESEARCH PRODUCT

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

Gioacchino Conoscenti Carmelo Sunseri Rosalinda Inguanta F. Carfì Pavia Salvatore Piazza Isabella Mendolia V. La Carrubba C. Zanca Fabrizio Ganci Francesco Lopresti Valerio Brucato

subject

Materials science Galvanic anode Cytotoxicity Simulated body fluid Polyvinyl acetate 02 engineering and technology engineering.material 010402 general chemistry 01 natural sciences Hydroxyapatite Corrosion chemistry.chemical_compound Coating Materials Chemistry Galvanic cell Brushite Orthopedic implants Settore ING-IND/24 - Principi Di Ingegneria Chimica Polyvinyl acetate Settore ING-IND/34 - Bioingegneria Industriale Surfaces and Interfaces General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Surfaces Coatings and Films Anode Corrosion Galvanic deposition Settore ING-IND/23 - Chimica Fisica Applicata Chemical engineering chemistry engineering 0210 nano-technology

description

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.

year	journal	country	edition	language
2021-02-01	Surface and Coatings Technology

https://doi.org/10.1016/j.surfcoat.2020.126771