The behaviour, in conditions of total immersion, of an acrylic water-based paint applied to a St 35.8 steel, has been studied using electrochemical techniques. The data obtained have enabled a three-step mechanism to be proposed. In the first step, there is an increase in the activity of the system, as a consequence of the entry of water. In the second step, once a critical level in the water content has been passed, the inhibitor pigments are activated, and this leads to a decrease in the electrochemical activity. Finally, once that the pigments have been exhausted, there is a loss of the protective properties of the paint, with the result that the activity detected is similar to that of the bare metal.
Degradation mechanism of an acrylic water-based paint applied to steels
Progress in Organic Coatings. An International Journal ; 47 , 2 ; 164-168
2003
5 Seiten, 6 Bilder, 1 Tabelle, 21 Quellen
Article (Journal)
English
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