Abstract
The inhibition effect and adsorption of bis(2-ethylhexyl) phosphate (EHP) and dioctyl phosphate (DOP) anions ((C8H17-O)2P(O)OH) in the depassivation of iron, aluminum, and zinc in neutral solutions were studied by electrochemical and ellipsometric methods. Both the anions exhibit high passivating properties; DOP is superior to EHP in passivating iron and has a considerable aftereffect. The adsorption of dialkyl phosphates on passive iron from a borate buffer is governed by the Frumkin isotherm.
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