SEA WATER CORROSION CONTROL BY ENVIRONMENT MODIFICATION
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.
Dow Chemical CompanyFreeport, TX United States 77541
- Legault, R A
- Publication Date: 1969-4
- Pagination: 125 p.
- TRT Terms: Corrosion; Corrosion protection; Desalination; Environmental impacts
- Uncontrolled Terms: Corrosive environments
- Subject Areas: Environment; Marine Transportation;
- 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