Corrosion Rate and Mechanism of Degradation of Chitosan/TiO 2 Coatings Deposited on MgZnCa Alloy in Hank's Solution.

Autor: Krawiec H; Faculty of Foundry Engineering, AGH University of Krakow, 23 Reymonta Street, 30-059 Krakow, Poland., Kozina I; Faculty of Foundry Engineering, AGH University of Krakow, 23 Reymonta Street, 30-059 Krakow, Poland., Starowicz M; Faculty of Foundry Engineering, AGH University of Krakow, 23 Reymonta Street, 30-059 Krakow, Poland., Lekka M; Polytechnic Department of Engineering and Architecture, University of Udine, 33100 Udine, Italy., Zanella C; Department of Materials and Manufacturing, Jonkoping University, 553 18 Jonkoping, Sweden.; Department of Industrial Engineering, University of Trento, 38123 Trento, Italy., Fedrizzi L; Polytechnic Department of Engineering and Architecture, University of Udine, 33100 Udine, Italy., Fedel M; Department of Industrial Engineering, University of Trento, 38123 Trento, Italy., Deflorian F; Department of Industrial Engineering, University of Trento, 38123 Trento, Italy.
Jazyk: angličtina
Zdroj: International journal of molecular sciences [Int J Mol Sci] 2024 May 13; Vol. 25 (10). Date of Electronic Publication: 2024 May 13.
DOI: 10.3390/ijms25105313
Abstrakt: Overly fast corrosion degradation of biodegradable magnesium alloys has been a major problem over the last several years. The development of protective coatings by using biocompatible, biodegradable, and non-toxic material such as chitosan ensures a reduction in the rate of corrosion of Mg alloys in simulated body fluids. In this study, chitosan/TiO 2 nanocomposite coating was used for the first time to hinder the corrosion rate of Mg19Zn1Ca alloy in Hank's solution. The main goal of this research is to investigate and explain the corrosion degradation mechanism of Mg19Zn1Ca alloy coated by nanocomposite chitosan-based coating. The chemical composition, structural analyses, and corrosion tests were used to evaluate the protective properties of the chitosan/TiO 2 coating deposited on the Mg19Zn1Ca substrate. The chitosan/TiO 2 coating slows down the corrosion rate of the magnesium alloy by more than threefold (3.6 times). The interaction of TiO 2 (NPs) with the hydroxy and amine groups present in the chitosan molecule cause their uniform distribution in the chitosan matrix. The chitosan/TiO 2 coating limits the contact of the substrate with Hank's solution.
Competing Interests: The authors declare no conflicts of interest. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript; or in the decision to publish the results.
Databáze: MEDLINE
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