CorrosionDOE-HDBK-1015/1-93GENERAL CORROSIONRev. 0CH-02Page 11GENERAL CORROSIONThis chapter describes the general corrosion processes of iron and carbonsteel (not stainless steels) in aqueous environments. Of particular interestis the formation of the oxide film and the effects of system variables on thecorrosion process. EO 1.7LIST the two conditions that contribute to generalcorrosion.EO 1.8DESCRIBE how the rate of corrosion occurring in theplant is effected by the following:a.Temperatureb.Water velocityc.Oxygend.pHe.Condition and composition of the metal surfacef.Dissolved solidsEO 1.9LIST the three products that are formed from thegeneral corrosion of iron.EO 1.10IDENTIFY the action taken for initial fill of a reactorsystem to limit general corrosion.EO 1.11STATE the four methods used to chemically controlgeneral plant corrosion.EO 1.12LIST the six water chemistry conditions that limitcorrosion of aluminum.ConditionsContributingtoGeneralCorrosionGeneral corrosion is the process whereby the surface of a metal undergoes a slow, relativelyuniform, removal of material. The two conditions typically required for a metal to undergogeneral corrosion are: 1) metal and water in the same environment, and 2) a chemical reactionbetween the metal and water that forms an oxide.
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