Abstract
The corrosion inhibition efficiency of two oligomers, derived from glycolysed products of poly(ethylene terephthalate) with diethanol and triethanol amine, was measured from weight loss and electrochemical polarization techniques. The polarization curves indicate that these oligomers act as mixed-type inhibitors. The inhibition efficiency was increased with increment of inhibitor concentration. The temperature effect on the corrosion behavior of steel in 1M HCl with and without oligomers was studied at different temperatures ranged from 308 to 343 K. The adsorption of inhibitors on the steel surface was increased with increment of the temperature. Some thermodynamic data for the adsorption process were calculated and discussed.
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