PARASITIC CONSUMPTION OF CORROSION INHIBITOR BYPRODUCED SOLID PARTICLES AND EMULSION DROPLETS INMULTIPHASE FLOW

摘要

Corrosion inhibitor performance tests showed that fine solid particles (fines) in the producedfluids, as well as dispersions (emulsions) of oil droplets in water, can reduce inhibitor performance. Theparticles and dispersed droplets can constitute a large surface area onto which surface active corrosioninhibitor compounds can adsorb. When the surface area exceeds 1 m2/L (order of magnitude) they candeplete a significant amount of corrosion inhibitor from the corrosive aqueous phase. This 'parasitic'consumption of inhibitor constitutes a potential corrosion risk and leads to increased inhibitor demand.The surface charge was shown to be an important parameter for adsorption of corrosion inhibitor ontosolid particles, but not so important for the adsorption onto oil-in-water droplets.