ADSORPTION AND INHIBITIVE CORROSION PROPERTIES OF SOME NEW POLYMERIC COMPOUNDS ON CARBON STEELS IN COOLING WATER SYSTEMS

作者：Branzoi Florina; Branzoi Viorel^*; Harabor Iulia

来源：Romanian Journal of Chemistry, 2011, 56(2): 115-128.

• organic inhibitors
• microwaves energy
• cooling water systems
• electrochemical polarization
• spectroscopy FT-IR
• electrochemical impedance spectroscopy and metallurgical microscopy techniques

Using the microwaves energy new organic polymers were synthesised by radicalic polymerization. These new organic compounds have anticorrosive and antiscale properties and for this reason, were used for cooling water systems protection. The inhibition activity analysis of these new organic polymers was made by assuming that the mechanism of inhibition by organic molecules is chemisorptions and that the energetic of the corrosion process per se is unaffected by the addition of substituents on the parent compound. We presume that, these new organic polymers inhibit corrosion of carbon steel by a protective mechanism, forming insoluble iron complexes and repairing the porous oxide layers. The methods employed were potentiodynamic polarization, electrochemical impedance spectroscopy and metallurgical microscopy techniques. The addition of the organic inhibitors led in all the cases to inhibition of the corrosion rate. The inhibition efficiency was high in all the studies cases. The corrosion parameters obtained from polarization curves and from EIS spectra are in good concordance and point out the inhibitory action of these new organic polymers. The adsorptions of the organic compounds on the carbon steels surface obeyed Langmuir's isotherm. Using Fourier transform infrared spectroscopy (FT-IR) it was proved the adsorption of organic inhibitors and the formation of corrosion products on the carbon steels surface

• 出版日期2011-2