Electrophoretic deposition and characterization of chitosan-molybdenum composite coatings
| Autor: | Renato Alexandre Costa de Santana, Alcides de Oliveira Wanderley Neto, José Anderson Machado Oliveira |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Polymers and Plastics Sodium molybdate Organic Chemistry Composite number chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Homogeneous distribution 0104 chemical sciences Corrosion Chitosan chemistry.chemical_compound Electrophoretic deposition chemistry Chemical engineering Molybdenum Materials Chemistry 0210 nano-technology |
| Zdroj: | Carbohydrate polymers. 255 |
| ISSN: | 1879-1344 |
| Popis: | In this paper, the effect of the electric field on the properties of a new chitosan-molybdenum (Chit-Mo) composite coating obtained by electrophoretic deposition (EPD) was investigated. The composite coatings obtained showed different morphologies depending on the conditions used during the deposition process. Chemical composition results and microstructure analysis showed homogeneous distribution of molybdenum in a chitosan matrix. Corrosion test results showed that the Chit-Mo composite coatings can increase corrosion resistance of 1020 steel in NaCl medium (3.5 %). The coatings obtained at 5 V, pH 5.5, and using a low concentration of reagents (suspension 1: chitosan 0.5 g/L and 1 mM sodium molybdate) reached an inhibition efficiency of up to 76.7 %. Therefore, the results obtained in this work prove the achievement of a new class of chitosan-based composite materials with potential application in the protection of metal structures against corrosion. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect