PROCÉDÉ DE RÉDUIRE LA CORROSION DANS UNE INSTALLATION DE RAFFINERIE À HUILE

摘要

The invention provides a method for determining the amount of various materials in a liquid sample positioned in an apparatus (100). Because the apparatus is particularly resilient it can be used repeatedly with very harsh liquid samples such as boot water from an oil refinery. The apparatus is used in a method of reducing corrosion involving determining at least one of: the pH, amount of chloride, and/or amount of iron in the sample. The optical property can be colorimetric, fluorescent or both and result from adding dyes, complexing agents, turbidity inducing compounds, and other optically effecting reagents to the sample. Because the measurements are concentration and volume independent they can be done continuously, quickly, and avoid the inconvenient start and stop procedures in prior art measurement regimens. The method further includes using a BDD cell to oxidize materials (such as sulfoxy compounds) that would otherwise interfere with the optical analysis and/or to sparge the sample with gas.