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Localized electron microscopy analysis of steel corrosion processes in the presence of zinc phosphate flake-type particles

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Veröffentlicht/Copyright: 16. März 2020
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International Journal of Materials Research
Aus der Zeitschrift International Journal of Materials Research Band 111 Heft 3

Abstract

Zinc phosphate particles are used in coatings that protect steel from corrosion. The corrosion of coated steel was examined at the microscopic scale in proximity of zinc phosphate flakes. The coatings were prepared by dispersing the zinc phosphate flakes in epoxy-phenolic resin matrix, spray coating on the steel substrate, and curing. Such prepared coatings were then scratched, and corroded in the artificial weathering conditions by means of a condensate climate test. The ongoing corrosion process was examined using environmental scanning electron microscopy (ESEM). By applying this approach, we observed the influence of the anisotropic particles of zinc phosphate on the formation of corrosion products. Local areas at the edge of the scratch that were in direct contact with the zinc phosphate aggregates, revealed the formation of a different crystal type compared to the plain areas of the scratch. The obtained data indicates that a partial dissolution of the zinc phosphate particles took place, and suggests that the influence of zinc phosphate on the formation of corrosion products was mediated by the presence of water.

Keywords: Zinc phosphate; Flakes; Steel; Local corrosion; Scanning electron microscopy
∗ Correspondence address, Dr. Carsten Becker-Willinger, Program Division Nanomers, INM – Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany, Tel.: +49 681 9300 196, Fax: +49 681 9300 279, E-mail: , Web: www.leibniz-inm.de
#

These authors have contributed equally to this work

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Received: 2019-05-21
Accepted: 2019-09-06
Published Online: 2020-03-16
Published in Print: 2020-03-11

© 2020, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.111870
Schlagwörter für diesen Artikel
Zinc phosphate; Flakes; Steel; Local corrosion; Scanning electron microscopy

Artikel in diesem Heft

  1. Contents
  2. Contents
  3. Editorial
  4. A new Board of Managing Editors for IJMR
  5. Original Contributions
  6. Carbon nanotube network as an electron pathway in nanocomposite films
  7. Optimization of bamboo mesoparticle/nylon 6 composite mechanical properties using a response surface methodology
  8. Thermodynamic description of the Eu–Ga system using substitutional solution and associate models
  9. Effects of minor additions of cerium, silicon and calcium on microstructure and mechanical properties of AZ91 magnesium alloy
  10. Localized electron microscopy analysis of steel corrosion processes in the presence of zinc phosphate flake-type particles
  11. The effect of pulse frequency on the microstructure and surface mechanical properties of composite coatings on the surface of AISI304
  12. Short Communications
  13. Facile preparation of single phase high-entropy oxide nanocrystalline powders by solution combustion synthesis
  14. Original Contributions
  15. Rapid synthesis of high-purity Al4SiC4 powder by microwave hybrid heating
  16. Investigation of microstructure and mechanical properties of Al2O3 and granite-powder-reinforced Al7075 hybrid composite
  17. Effect of annealing temperature on size and optical properties of CH3NH3PbI3 nanowires
  18. Chemical bioactivation of titanium surface for dental implants
  19. DGM News
  20. DGM News
Heruntergeladen am 13.4.2026 von https://www.degruyterbrill.com/document/doi/10.3139/146.111870/html
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