The study was concerned with corrosion control through environment modification without regard to the possible contamination of product water or the possible production of a toxic desalination plant effluent by an additive. If a particular additive performs satisfactorily as a corrosion inhibitor, the elimination of any contamination can be studied as a separate problem. The efficient exclusion of dissolved oxygen from sea water will permit the use of mild steel in this environment at a temperature of 250 F. Contamination of the sea water with traces of dissolved oxygen is sufficient to cause a localized attack that is prohibitive even at low corrosion rate values. Additionally, data obtained in this program indicate that: 5052 aluminum can be used without additives in desalination applications, and the presence of dissolved oxygen is not detrimental; the addition of 50 PPM of a binary phosphate-chromate inhibitor to the sea water makes it possible to use mild steel in desalination environments containing dissolved oxygen; the addition of 50 PPM of bicarbonate ion to the sea water makes it possible to use 1100 aluminum in desalination applications when the pH is adequately controlled; the addition of 100 PPM of chromate ion to the sea water makes it possible to use 1100 aluminum, as well as 3003, 5554, 6061 aluminum, in desalination applications.

  • Corporate Authors:

    Dow Chemical Company

    Freeport, TX  United States  77541
  • Authors:
    • Legault, R A
  • Publication Date: 1969-4

Media Info

  • Pagination: 125 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00025713
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: OSW-PR-438 R&D Rpt
  • Contract Numbers: DI-14-01-0001-1482
  • Files: TRIS
  • Created Date: Mar 28 1972 12:00AM