Mahlatiuk L. Development of corrosion inhibitors of heat exchange equipment on the basis of organic derivatives of the VІ group d-elements oxoanions

Corrosion of carbon and low-alloy steels in inhibitory neutral aqueous media. Aim of investigations - creation of new inhibitors-derivatives of oxoanions of the VI group d-elements for protection of steels against corrosion , biocorrosion and corrosion -mechanical fracture in neutral environments . Methods of investigation: gravimetric and electrochemical; impedancemetry; polarization curves, polarization curves, including on a disc rotating electrode; roentgen and roentgen fluorescent; IR-spectroscopic; differential thermal analysis. Theoretical and practical results, novelty- On the basis of organic derivatives of oxoanions of the VІ -group d-elements new compounds - corrosion inhibitors are synthesized and identified. Their retarding effect on corrosion, biocorrosion and corrosion-mechanical fracture of carbon and low-alloy steels, in particular under low-cycle loading and cavitation is found. New composite inhibitor CORSOL -2 for protection of heat-exchange systems is developed and possibility to reduce by this inhibitor the growth of bacteria of several types (Patent of Ukraine) is shown. The investigation results are used for corrosion and biocorrosion protection of heating system in hotel "Premier Palace " ( Kyiv), cooling water systems at "Svitoch" confectionary company ( Lviv) . Results of this work can be used at the plants of chemical, food and petroleum-refining industries for protection of water circulating systems, in particular at Rivne and Siverdonetsk " Azot" open stock company, " Lvivska pyvovarnia" ltd. and other for protection of central heating systems; in education process, when giving lectures in speciality " Corrosion and metal protection against corrosion".