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Picture for Corrosion Behavior of Naphthenic Acids Isolated from Vacuum Gas Oil Crude Fractions
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51318-11071-Corrosion Behavior of Naphthenic Acids Isolated from Vacuum Gas Oil Crude Fractions

Product Number: 51318-11071-SG
Author: Yathish Kurapati / Winston Robbins / Gheorghe Bota / David Young
Publication Date: 2018
$20.00

Corrosion behavior of native naphthenic acids in two VGO fractions are compared with white oil solutions of the acids isolated from them by solid phase extraction (SPE). Tests are per the in-house “pretreatment-challenge” protocol on carbon steel and 5Cr steel samples.
valuation Of Reactive Sulfur For Improved Corrosion Predictions In Oil Refineries
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Evaluation Of Reactive Sulfur For Improved Corrosion Predictions In Oil Refineries

Product Number: 51322-18039-SG
Author: Ishan Patel, Gheorghe Bota, David Young
Publication Date: 2022
$20.00

Naphthenic acids and sulfur species in crude oil cause severe corrosion of the steel equipment of crude distillation units in oil refineries.1–3 Because of rapidly changing oil economics, the refineries have inclined towards cheaper “opportunity crudes”, but the high levels of corrosive species, mainly naphthenic acids and organosulfur compounds, in these crudes would reduce the life of the equipment, and also increase the risk of catastrophic failure.3 So the opportunity crudes are often blended with the crudes containing lower levels of corrosive species; this decreases overall concentration of corrosive species and the corrosion rates.4,5 However, corrosion rates are not simply proportional to the concentrations of naphthenic acids and sulfur species that are present in the crude oil.4,5 Without accurate estimation of corrosion rates by crude oils or their “blends”, carbon steel equipment needs to be constructed with higher wall thickness for safety; if still insufficient, high alloy steels are required.
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