Abstract
The corrosion rate, and the nature and depth of the corrosion damage for X60 pipe steel in model solutions is studied: stratal water of the Samotlor oil field, stratal water of the Usinsk oil field, and the NACE medium are studied. It is established that the pipe steel corrosion rate in the media studied decreases with an increase in the test time from 24 to 1440 h, and after 96 h there is a transition from uniform corrosion to the appearance and development of pitting and dimple corrosion. The corrosion process is concentrated beneath a film; it proceeds at the active centers of the steel surface, and is reduced towards the depth of corrosion areas. During tests in stratal water of the Usinsk oil field and in the NACE medium containing hydrogen sulfide, the total number of corroded steel areas and their depth is greater than when tested in stratal water of the Samotlor oil field. The results obtained indicate that it is possible to use X60 steel pipes in the oil field deposit waters.
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