Electrophoretic deposition and characterization of chitosan/bioactive glass composite coatings on Mg alloy substrates

• Published in: Electrochimica acta Vol. 232; pp. 456 - 464
• Main Authors: Heise, Svenja, Höhlinger, Michael, Hernández, Yadir Torres, Palacio, Juan José Pavón, Rodriquez Ortiz, Jose Antonio, Wagener, Victoria, Virtanen, Sannakaisa, Boccaccini, Aldo R.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.04.2017; Elsevier BV
• Subjects: bioactive glass; Biocompatibility; Biomedical materials; Body fluids; Chitosan; Coating effects; coatings; Corrosion; Corrosion effects; Corrosion tests; Electrochemical impedance spectroscopy; Electrophoretic deposition; Glass coatings; In vitro methods and tests; magnesium alloys; Magnesium base alloys; Mechanical properties; Protective coatings; Studies; Substrates; Surgical implants; chitosan; magnesium alloys; corrosion; bioactive glass; coatings; Electrophoretic deposition
• ISSN: 0013-4686; 1873-3859
• DOI: 10.1016/j.electacta.2017.02.081

Electrophoretic deposition of chitosan-bioactive glass (45S5 composition) composite coatings on magnesium alloy (WE43) substrates was investigated. Two types of substrates were considered, one was the bare, non-pre-treated substrate, while the other one had been treated in Dulbecco’s Modified Eagle Medium (DMEM). The protective effect of the coatings (of ∼2μm in thickness) against corrosion was tested using electrochemical impedance spectroscopy and the coatings’ bioactive behaviour was determined in simulated body fluid. A tribo-mechanical characterization of the coatings was performed. Overall, results confirmed the importance of pre-treating the substrate to corrosion protective chitosan-bioactive glass coatings on WE43 alloy.