Corrosion Protection of Arctic Offshore Structures: Final Report. [Effects of Temperature and Salinity on Required Cathodic Protection Current]

Results are presented for a research program on corrosion prevention for Arctic offshore structures which are in contact with sea ice for a significant portion of the year. The electrical method most adaptable for structure protection involves the injection of impressed current from several remote a...

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Bibliographic Details
Main Authors: Sackinger, W. M., Rogers, J. C., Feyk, C., Theuveny, B.
Format: Report
Language:English
Published: University of Alaska Fairbanks. Geophysical Institute. 1985
Subjects:
Ice
Online Access:https://doi.org/10.2172/6851513
https://digital.library.unt.edu/ark:/67531/metadc1181512/
Description
Summary:Results are presented for a research program on corrosion prevention for Arctic offshore structures which are in contact with sea ice for a significant portion of the year. The electrical method most adaptable for structure protection involves the injection of impressed current from several remote anodes buried just beneath the sea floor. The electrical resistivity of annual sea ice as a function of temperature and salinity is presented. Details of the interface layers formed between sea ice and steel in the presence of current injection are shown. A computer program was developed to enable the calculation of protective current density into the structure, in the presence of ice rubble and ridges around the structure. The program and the results of an example calculation are given for a caisson- retained island structure. 81 refs., 103 figs., 3 tabs.