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Shcherets'Kyi O.A.,Ukrainian Academy of Sciences | Starchak V.H.,Shevchenko Chernihiv National Pedagogic University | Horbunova T.A.,Chernihiv Institute of Information Business and Law
Materials Science | Year: 2013

We study the influence of temperature, aggressiveness of the media, and interface interaction on the corrosion characteristics of boron-aluminum composites with the help of simultaneous thermal analysis that combines two methods of investigation, namely, thermogravimetry and differential scanning calorimetry. By using the simultaneous thermal analysis, we establish the mass fraction of reinforcing components (boron fibers), the amount of inhibitors on the surfaces of composite materials, their thermal resistance, and the comparative intensities of corrosion in various corrosive media. © 2013 Springer Science+Business Media New York.

Bondar O.S.,Shevchenko Chernihiv National Pedagogic University | Prykhod'ko S.V.,Shevchenko Chernihiv National Pedagogic University | Kurmakova I.M.,Shevchenko Chernihiv National Pedagogic University | Humenyuk O.L.,Chernihiv State Technological University
Materials Science | Year: 2011

We have investigated the inhibiting action of acetonitrile derivatives and secondary amine in a hydrochloric acid medium during corrosion of low-carbon steel. It is shown that the protective effect ranges from 86.5 to 92.5% (2 mmole/liter) in a 1 M solution of hydrochloric acid, from 51.2 to 89.6% in a hydrogen sulfide medium, and from 14.5 to 87.3% (3.5 mmole/liter) under biocorrosion. Comparing the coefficients of retardation of triazole acetonitrile, benzaldehyde, p -methylbenzaldehyde, methyltriazoloazepine, and p -toluidine, which are structural fragments of the investigated compounds, we have established that the triazoloazepine and aryl substituents in the composition of a molecule of secondary amine assure a substantial synergetic effect, whereas, in the composition of acetonitrile derivatives, they provide an additive action. © 2011 Springer Science+Business Media, Inc.

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