Polyaniline as Additive to Improve the Anticorrosive Properties of Commercial Paint
| Autor: | Jorge Mendoza, Isora Barrera, Álvaro Arrieta |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Process equipment
Materials Science (miscellaneous) Process Chemistry and Technology General Engineering Nanotechnology General Chemistry General Medicine General Biochemistry Genetics and Molecular Biology chemistry.chemical_compound chemistry Petrochemistry Polyaniline Materials Chemistry General Pharmacology Toxicology and Pharmaceutics |
| Zdroj: | Revista de Chimie. 72:136-143 |
| ISSN: | 2668-8212 0034-7752 |
| DOI: | 10.37358/rc.21.3.8444 |
| Popis: | Corrosion is one of the great problems that many industries face and that generates losses of millions of dollars worldwide. The aim of this work was to evaluate the capacity of polyaniline to increase the anticorrosive capacity of a commercial epoxy paint. Polyaniline was chemically synthesized by oxidation with ammonium persulfate and doped with oleic acid. Polyaniline was added to the paint in various concentrations to evaluate its behavior as an additive to improve the anticorrosion capacity on stainless steel samples. An electrochemical characterization by polarization curves and visual observation was carried out to evaluate the anticorrosive behavior of the modified paints. The results showed that the corrosion rate determined from the tafel plot was lower in the steel samples covered with paint and polyaniline. The concentration of 0.8% of polyaniline in the paint showed a corrosion rate 12 times lower than that of the polyaniline-free paint. Additionally, visual observations and measurements of failed area carried out by applying an accelerated corrosion process by immersion in a 3.5% NaCl aqueous solution, allowed determining that, at a time of exposure of 300 h, corrosion inhibition can be achieved 26 times greater with the addition of 0.8% polyaniline. These results allowed to conclude that the addition of polyaniline by means of a simple mixture, significantly improved the anticorrosive protection capacity of a commercial epoxy paint. |
| Databáze: | OpenAIRE |
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