<abstract xmlns="http://www.w3.org/1999/xhtml"><p>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.</p></abstract>

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.

Strontium-based nanosized phosphates as anticorrosive fillers of epoxy and polyurethane coating compositions

Szczecin, Faculty of Chemical Technology and Engineering, Polymer Institute

Szczecin, Faculty of Chemical Technology and Engineering, Institute of Inorganic Chemical Technology and Environmental Engineering

Polish Journal of Chemical Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Anticorrosive epoxy and polyurethane coatings were compounded using zinc-free nanosized phosphates of strontium (SP) or strontium and aluminum (SAP). For...

Strontium-based nanosized phosphates as anticorrosive fillers of epoxy and polyurethane coating compositions

Published Online: Jun 28, 2019

Page range: 52 - 58

DOI: https://doi.org/10.2478/pjct-2019-0020

Keywords
Strontium phosphate, strontium aluminum phosphate, calcium aluminum ammonium phosphate, zinc phosphate, anticorrosive coatings

© 2019 Krzysztof Kowalczyk et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Strontium-based nanosized phosphates as anticorrosive fillers of epoxy and polyurethane coating compositions

Published Online: Jun 28, 2019

Page range: 52 - 58

DOI: https://doi.org/10.2478/pjct-2019-0020

KeywordsStrontium phosphate, strontium aluminum phosphate, calcium aluminum ammonium phosphate, zinc phosphate, anticorrosive coatings

© 2019 Krzysztof Kowalczyk et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
Strontium phosphate, strontium aluminum phosphate, calcium aluminum ammonium phosphate, zinc phosphate, anticorrosive coatings