Research inhibiting properties of cationic polyelectrolytes in the processes of corrosion
Keywords:
surface-active substances, the adsorption isotherm, polyelectrolyte, inhibitory effectAbstract
Raising of problem. Synthetic water-soluble cationic polymers are promising components of speed regulators and industrial metal plating of corrosion inhibitors due to their high efficiency, stability of the compound, low toxicity and biodegradability. However, the compounds of this class contain a large number of hydrophilic groups, oligomers limiting adsorption capacity for metals. An alternative way to increase the adsorption capacity of cationic oligomers may be grafted functional groups which specifically interact with the metal surface. Results. Obtained the extreme dependence of the free energy of adsorption of modified cationic polyelectrolyte on the degree of grafting and aromatic carboxyl functional groups on the zinc and iron electrodes .. Installed growth modified organic adsorbate interaction with the metal surface with increasing degree of grafting of functional groups. Results Reduction of macromolecules squeezing solvent in the phase boundary as the degree of grafting of functional groups due to increased hydrophilic macromolecules. The maximal inhibitory action at zinc and iron corrosion in neutral and acidic environments polyelectrolytes exhibit modified aromatic groups. The observed effect is due mainly to steric inhibition factor. Purpose. the study of influence of the substituents and their degree of grafting on the adsorption properties of ingibiting cationic polyelectrolyte. Conclusion. A significant increase in the inhibitory effect of phthalic anhydride-modified polyelectrolyte compared to. Thus, in the modification of cationic oligomers phthalic anhydride can significantly increase their adsorption and inhibitory properties.
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