Strontium-based nanosized phosphates as anticorrosive fillers of epoxy and polyurethane coating compositions
| Autor: | Krzysztof Kowalczyk, Justyna Gołąbek, Barbara Grzmil, Katarzyna Przywecka |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Polyurethane coating General Chemical Engineering zinc phosphate chemistry.chemical_element 02 engineering and technology 010402 general chemistry 01 natural sciences strontium aluminum phosphate strontium phosphate QD1-999 Strontium Industrial chemistry General Chemistry Epoxy 021001 nanoscience & nanotechnology 0104 chemical sciences Chemistry calcium aluminum ammonium phosphate chemistry Chemical engineering visual_art anticorrosive coatings visual_art.visual_art_medium 0210 nano-technology Biotechnology |
| Zdroj: | Polish Journal of Chemical Technology, Vol 21, Iss 2, Pp 52-58 (2019) |
| ISSN: | 1899-4741 |
| Popis: | Anticorrosive epoxy and polyurethane coatings were compounded using zinc-free nanosized phosphates of strontium (SP) or strontium and aluminum (SAP). For comparison, a nanosized calcium aluminum ammonium phosphate (CAP) and a microsized zinc phosphate (ZP) were tested. Results of salts spray and cyclic corrosion tests revealed better anticorrosive properties of the SAP-based coatings in relation to the samples with the other Zn-free fillers or ZP. Electrochemical noise tests of uncoated steel in aqueous suspensions of the phosphates exhibited similar corrosion inhibition efficiency of the Sr-based phosphates and ZP, and worse anticorrosive features of CAP. Electrochemical impedance spectroscopy did not show better protective properties of ZP-based coatings than the samples with the Zn-free fillers. |
| Databáze: | OpenAIRE |
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