engleski

Corrosion protection by poly(Ortho-Ethoxyaniline)

It is found that POEA, when in the EM state, maintains the stainless steel potential in the passive region. It is also shown that in the case of passivated steel but not protected by POEA, within the short time the potential decreases from the passivation potential region to the corrosion potential value. A comparison of the EIS results for bare stainless steel, stainless steel cycled in the solution of synthesis and stainless steel with POEA coating suggests that polymer is formed already in the first cycle of synthesis. The values of the resistive impedance component decrease with the coating thickness, indicating changes in the LE/EM ratio in the polymer coating and/or changes of other film properties. Capacitative behaviour obtained from low frequency range is characteristic for the EM state. As is expected, the capacitative component decrease with decrease of the coating thickness.

corrosion protection; polymer layers; poly(ortho-ehoxyaniline); EIS

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