Effects of the elution of waterbased corrosion protection primers on their protective properties

Samples of five waterbased corrosion protection primers were characterized regarding their protective properties with and without performing a preliminary elution procedure. These characterizations concerned the barrier properties and the water balance and showed that for some of such pre-conditioned waterbased coatings improved protective properties were found. This finding suggests that failing of the elution procedure may be the reason for unfavourable short-time test results, which do not correspond with the outdoor weathering performance of waterbased corrosion protection coatings.