Saša Skale (Author), Valter Doleček (Author), Mojca Slemnik (Author)

Abstract

Electrochemical impedance spectroscopy (EIS) was used to study the corrosion behavior of different types of commercial quality epoxy polyamide dry coatingson mild steel, with thickness between 150 and 250 ▫$/mu$▫m, which were previously weather accelerated in a wet chamber. The following data were established on the basis of impedance curves and corresponding equivalent circuits: the coating capacity that relates to the coating dimension, the pore resistance that represents conductive paths through the pores, and Warburg coefficients, which are the measure of ion diffusion through the coating. EIS data were compared with a criterion in the European standard, and samples were classified on the basis of their quality, also receiving a final ranking by summing-up all the individual rankings. Suggestions have been made, namely that the use of anticorrosive active pigments is obsolete, when the thickness of the coatings exceeds 200 ▫$/mu$▫m.

Keywords

elektrokemijska impedančna spektroskopija;kovinski premazi;epoksi poliamidni premazi;vlažna komora;ISO 12944;electrochemical impedance spectroscopy;metal-coatings;epoxy polyamide coatings;weathering;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UM FKKT - Faculty of Chemistry and Chemical Engineering
UDC: 620.193
COBISS: 12194838 Link will open in a new window
ISSN: 0300-9440
Views: 2141
Downloads: 90
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Other data

Secondary language: English
Secondary keywords: elektrokemijska impedančna spektroskopija;kovinski premazi;epoksi poliamidni premazi;vlažna komora;ISO 12944;
URN: URN:SI:UM:
Pages: str. 387-392
Volume: ǂVol. ǂ62
Issue: ǂiss. ǂ4
Chronology: June 2008
DOI: 10.1016/j.porgcoat.2008.02.003
ID: 8717772