Corrosion inhibitor performance tests showed that dispersions (emulsions) of oil droplets in water could reduce inhibitor performance. Surface active, amphiphilic inhibitor molecules have a high affinity for accumulation at the oil-water interface. The dispersed droplets may constitute a very large surface area. When the surface area exceeds 1 m2 /liter (order of magnitude) they can deplete a critical 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.

Subject
Steel surfaces, Water, Droplets, Inhibitor performance, Corrosion rate, Emulsions, Nozzles, Flow velocity, Sodium chloride, Chemical inhibition, Corrosion inhibitors, Corrosion protection, Oil
Keywords:
corrosion, inhibition, carbon dioxide, carbon steel, dispersions, emulsions
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2004
Association for Materials Protection and Performance (AMPP)
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