The basic objective of this program which is sponsored by the Office of Saline Water is the investigation of the possibility that the most economical method of controlling corrosion in desalination plants is by treatment of the water rather than by the use of expensive materials of construction. This particular paper is concerned with results obtained in a recirculating loop test utilizing as inhibitor a chromate-phosphate inhibitor mixture described in an earlier paper. (1) This particular apparatus allowed the determination of corrosion rates under flowing conditions in such a manner that the test medium came in contact only with the mild steel being tested and inert materials (glass and Teflon) used in constructing the dynamic test loop. The only other foreign material in the dynamic test loop was a piece of tantalum rod used in an electrode holder as a reference electrode in determining instantaneous corrosion rate measurements by a linear polarization technique and another piece of tantalum making up the orifice of the differential pressure cell.

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