Corrosion control in the presence of sulfate-reducing bacteria

Journal Article · Sun Jul 01 04:00:00 EDT 1990 · Materials Performance; (USA)

OSTI ID:6794256

Schick, G ^[1]

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1. Bellcore, Morristown, NJ (US)

Impressed current and magnesium anode-type cathodic protection usually provide appreciable protection to the buried and underground telephone plant. However, in the laboratory, a medium containing sulfate-reducing bacteria (SRB) strongly reduces the output current from the magnesium anode. This explains the lack of success with magnesium anodes in the field where the ratio of protected surface area to current output is orders of magnitude higher than in the laboratory test. Low concentrations of sodium hypochlorite (NaOCl) additive to the solution provide minimal protection. However, high concentrations and/or aeration can eliminate the high concentration of SRB in the aqueous medium.

• OSTI ID: 6794256
• Journal Information: Materials Performance; (USA), Journal Name: Materials Performance; (USA) Vol. 29:7; ISSN MTPFB; ISSN 0094-1492
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
400400 -- Electrochemistry
42 ENGINEERING
422000 -- Engineering-- Mining & Underground Engineering-- (1980-)
ALKALINE EARTH METALS
ANODES
AQUEOUS SOLUTIONS
BACTERIA
CATHODIC PROTECTION
CORROSION PROTECTION
DISPERSIONS
ELECTRODES
ELEMENTS
HYDROGEN COMPOUNDS
HYPOCHLOROUS ACID
INORGANIC ACIDS
INTERACTIONS
MAGNESIUM
METALS
MICROORGANISMS
MIXTURES
SOLUTIONS
SULFATE-REDUCING BACTERIA
UNDERGROUND FACILITIES