Affiliation:
1. University of Banja Luka, Faculty of Technology, Banja Luka, Bosnia and Herzegovina
Abstract
In this paper, the corrosion test of copper in hydrocracked base oil HC-6 was
performed in the presence of an additive for extremely high pressures (EP
additive) in different concentrations. EP additives are used to reduce
wear in industrial applications, under high load conditions. Since most of
these additives are sulfur-based, whose compounds can be corrosive at high
temperatures, their use leads to corrosion of some materials. To prevent
corrosion in the base oil with the EP additive, three commercial corrosion
inhibitors are added. By chemical composition, the inhibitor RC 8210 is a
derivate of dimercaptothia-diazole, RC 4220 is a synthetic neutral calcium
sulfonate, and IRGAMET 39 is a derivative of tolutriazole. Efficiency of the
inhibitors was monitored by standard test methods for corrosiveness to
copper arising from petroleum products by the copper strip test (ASTM D-130)
and the gravimetric method, while oxidation stability of the base oil was
monitored by peroxide number determination. Oxidation was performed at 100?1?C for 3 and 24 h. Results of these studies have shown that IRGAMET 39 is
the most effective inhibitor in the presence of the EP additive at both
examined oxidation times.
Publisher
National Library of Serbia
Subject
General Chemical Engineering,General Chemistry
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