Citation:
N. Kouloumbi, G. M. Tsangaris, A. Skordos and S. Kyvelidis, Evaluation of the behaviour of particulate polymeric coatings in a corrosive environment. Influence of the concentration of metal particles, Progress in Organic Coatings, Volume 28, Issue 2, June 1996, Pages 117-124.
Abstract:
In this work pretreated steel specimens were coated by a spinning process with
particulate polymeric composites consisting of an epoxy resin (DOW 331) and iron
powder. Applied coatings were roughly 70 μm thick and the contained quantity of
iron particles was varied (7.5, 15, 30% wt./wt.). The effect of the presence of
iron particles in the coatings as well as the influence of their concentration
on the evaluation of the coatings' behaviour in a corrosive environment (3.5%
NaCI) was studied. Electrochemical impedance spectroscopy, corrosion potential,
corrosion current density (Tafel) and dielectric measurements were performed.
Minor differences in the anticorrosive behaviour of the coatings were observed
irrespective of the iron content in the coating. Effective resistance inhibition
action of the composite coatings was diminished with the increase of exposure
time to the corrosive environment being in all cases very close to that of the
pure epoxy resin coating
