Abstract
The effect of the plasticizer (butyl benzyl phthalate, BBP) addition on the corrosion resistance properties of paint films has been investigated by means of different electrochemical techniques (EIS and ac/dc/ac) and accelerated tests (salt fog spray). Primers based on epoxy resin were prepared with different plasticizer content (0, 1.5, 3, 5, 11, 16 and 25% in weight ratio to epoxy resin). An optimum quantity of plasticizer content (1.5–3%) was determined that gave the maximum anticorrosive performance of the epoxy primer. Results offered by each one of the techniques were quite similar and the ac/dc/ac one offered the results in a very short time (24 h).
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