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Enhancing the corrosion resistance of magnesium alloys with biodegradable poly(trimethylene carbonate) chemical modification coating
- Source :
- Materials Today Advances, Vol 21, Iss , Pp 100460- (2024)
- Publication Year :
- 2024
- Publisher :
- Elsevier, 2024.
-
Abstract
- Magnesium (Mg) alloys have great potential as biodegradable materials for medical device. However, their susceptibility to corrosion poses a significant challenge for practical applications. In this study, the poly(trimethylene carbonate)-dimethacrylate (PTMC-dMA) was employed as a coating material for ZE21B magnesium alloys. Upon UV irradiation, the PTMC-dMA macromer undergoes cross-linking to form a uniform PTMC coating with a thickness of approximately 5 μm, effectively protecting the magnesium alloy. The corrosion resistance in simulated body fluid (SBF) was evaluated through immersion testing, which showed minimal hydrogen generation (0.16 mL/cm2) during the initial 24-h period and slight corrosion observed on the PTMC-coated magnesium alloy surface after continuous immersion for 21 days. The silane coupling agent significantly enhanced the adhesive performance between the polymer and alloy. Micro-scratch tests revealed adhesion forces of 3.79 N and 5.75 N for coatings without and with the silane agent, respectively. Electrochemical tests also demonstrated the efficacy of silane treatment, showing corrosion currents of 2.100 × 108 A/cm2 for silane-treated samples compared 6.263 × 107 A/cm2 for untreated ones. Given its exceptional tensile and protective properties, this coated material is ideal for intricate bioresorbable applications, like endovascular bioresorbable stents.
Details
- Language :
- English
- ISSN :
- 25900498
- Volume :
- 21
- Issue :
- 100460-
- Database :
- Directory of Open Access Journals
- Journal :
- Materials Today Advances
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.0f39a762b53542299d03dfb042e7a7b6
- Document Type :
- article
- Full Text :
- https://doi.org/10.1016/j.mtadv.2023.100460