Treating chemicals are used in oil producing and refining operations to reduce many operating problems. This module will only discuss corrosion-related operating problems. Some common operating problems and treating chemicals are shown below.Operating Problem Equipment corrosionMicrobiologically-influenced corrosion DepositsCoagulant, flocculant Water-in-oil emulsion Oil-in-water emulsion Coagulant, flocculantTreating ChemicalCorrosion inhibitorOxygen scavengerScale inhibitor Suspended solids Emulsion breakerReverse breaker