This paper addresses pipeline conditions leading to a protective corrosion product scale. The special case of Top-Of-Line (TOL) corrosion will be considered in detail. Methods for TOL corrosion rate prediction are discussed and compared with new and old experimental data. Data best agree with the so-called iron super-saturation model. Avoiding high water condensation rates resulting from a low pipe wall temperature can obviate TOL corrosion. The protective corrosion product scale formed in TOL corrosion may be jeopardized by the presence of organic acids.

Subject
Water, Precipitation (solids), Corrosion rate, Predicted corrosion rate, Walls, Pipelines, Iron, Condensation rates, Supersaturation, Corrosion scales, Organic acids, Corrosion modeling, De Waard corrosion model
Keywords:
pipeline, carbon dioxide, corrosion, condensation, scaling, iron carbonate, organic acids
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2000
Association for Materials Protection and Performance (AMPP)
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