Low-Cost Biobased Coatings for AM60 Magnesium Alloys for Food Contact and Harsh Environment Applications
| Autor: | Eleonora Conterosito, Luca Palin, Giuseppe Rombolà, Marco Milanesio, Valentina Gianotti, Mattia Lopresti, Beatrice Mangolini |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
02 engineering and technology
01 natural sciences biobased coating Coated Materials Biocompatible Coating Powder coating food contact Aluminium Spectroscopy Fourier Transform Infrared Magnesium Biology (General) Spectroscopy Drop (liquid) General Medicine 021001 nanoscience & nanotechnology PA11 Computer Science Applications Chemistry visual_art Costs and Cost Analysis visual_art.visual_art_medium silicon-based coating 0210 nano-technology Materials science QH301-705.5 Alloy chemistry.chemical_element Environment engineering.material 010402 general chemistry Article Catalysis Inorganic Chemistry polyester lacquer Alloys chemically aggressive environment Physical and Theoretical Chemistry Magnesium alloy QD1-999 Molecular Biology Lacquer AM60 Organic Chemistry Metallurgy technology industry and agriculture magnesium alloy 0104 chemical sciences specific migration chemistry Food engineering |
| Zdroj: | International Journal of Molecular Sciences Volume 22 Issue 9 International Journal of Molecular Sciences, Vol 22, Iss 4915, p 4915 (2021) |
| ISSN: | 1422-0067 |
| DOI: | 10.3390/ijms22094915 |
| Popis: | Low-cost, environmentally friendly and easily applicable coating for Mg alloys, able to resist in real world conditions, are studied. Coatings already used for other metals (aluminum, steel) and never tested on Mg alloy for its different surface and reactivity were deposited on AM60 magnesium alloys to facilitate their technological applications, also in presence of chemically aggressive conditions. A biobased PA11 powder coating was compared to synthetic silicon-based and polyester coatings, producing lab scale samples, probed by drop deposition tests and dipping in increasingly aggressive, salty, basic and acid solutions, at RT and at higher temperatures. Coatings were analyzed by SEM/EDX to assess their morphology and compositions, by optical and IR-ATR microscopy analyses, before and after the drop tests. Migration analyses from the samples were performed by immersion tests using food simulants followed by ICP-OES analysis of the recovered simulant to explore applications also in the food contact field. A 30 μm thick white lacquer and a 120 μm PA11 coating resulted the best solutions. The thinner siliconic and lacquer coatings, appearing brittle and thin in the SEM analysis, failed some drop and/or dipping test, with damages especially at the edges. The larger thickness is thus the unique solution for edgy or pointy samples. Finally, coffee cups in AM60 alloy were produced, as real word prototypes, with the best performing coatings and tested for both migration by dipping, simulating also real world aging (2 h in acetic acid at 70° and 24 h in hot coffee at 60 °C): PA11 resulted stable in all the tests and no migration of toxic metals was observed, resulting a promising candidate for many real world application in chemically aggressive environments and also food and beverage related applications. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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