Reduction of Magnesium Corrosion Rate by PMMA-co-PMAA Films

Author(s)

Tayara C. Gonsalves ^[1] ; Bruno X. de Freitas ^[2] ; Carlos A. Nunes ^[3] ; Fábio H. Florenzano ^[4]

Affiliation

^[1] Universidade de São Paulo (USP). Escola de Engenharia de Lorena (EEL). Departamento de Engenharia de Materiais - Brasil

^[2] Universidade de São Paulo (USP). Escola de Engenharia de Lorena (EEL). Departamento de Engenharia de Materiais - Brasil

^[3] Universidade de São Paulo (USP). Escola de Engenharia de Lorena (EEL). Departamento de Engenharia de Materiais - Brasil

^[4] Universidade de São Paulo (USP). Escola de Engenharia de Lorena (EEL). Departamento de Engenharia de Materiais - Brasil

• Document type: Journal article
• Source: MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS; v. 24, n. 3 2021-04-09.

Abstract

Magnesium is an important base material for non-permanent implants, even though its corrosion rate in the human body is usually elevated for most applications. In order to reduce that rate, polymer coatings can be a better option than heavy-metal containing Mg alloys. In this work, random copolymers of PMMA and PMAA were synthesized and used for coating pure Mg by simply immersing Mg coupons into a diluted copolymer solution. It has been shown by SEM analysis and quantitative adsorption analysis that the copolymers have adsorbed onto the Mg surface. All the coated materials presented a lower corrosion rate than the uncoated Mg, reaching close to 100% reduction for most of the copolymer up to 6 hours of testing. The copolymers with 5, 8 and 13% of PMAA in their composition showed the best performances as corrosion controllers. (AU)

• FAPESP's process: 13/08166-5 - Interfacial chemistry: drugs, peptides and ezymes interactions with membrane models
• Grantee: Iolanda Midea Cuccovia
• Support Opportunities: Research Projects - Thematic Grants