✍ Scribed by St.-Å Lindqvist
No coin nor oath required. For personal study only.
The cathodic protection effect of zinc in zinc pigmented coatings can be clearly recognized above a certain pigment concentration. According to the results obtained during potentiostatic polarization experiments such an effect can be expected above 90% Zn. This effect will still be present after 30 days in sodium chloride solution, provided the original concentration is 93%, while the protective effect is lossed after this time in the case of 91% Zn. The potentiostatic methods are clearly superiour to a resistance method used preferentially and can be recommended for formulation of coating materials and for testing such coating materials and coatings.
📜 SIMILAR VOLUMES
Electrochemical impedance spectroscopy (EIS) in the 50kHz-ImHz frequency range was applied to characterize the corrosion protection behaviour of zinc rich ethyl silicate paints (ZRP) on steel in artificial sea water. The most accurate description of the experimental impedance spectra at the open cir