Can Dynamic Bubble Templating Play a Role in Corrosion Product Morphology?

Dynamic templating as a result of cathodic hydrogen gas production is suggested as a possible mechanism for the formation of tube-like corrosion products on an unlined cast iron pipe in a drinking water distribution system. Mounds of corrosion product, with protruding tubes and freestanding tubes, w...

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Bibliographic Details
Main Authors: Gerke, T L, Scheckel, Kirk G, Ray, Richard I, Little, Brenda J
Format: Report
Language:English
Subjects:
73-9576-01-5
BUBBLES
CASTINGS
CATHODIC PROTECTION
Civil Engineering
CORROSION
DRINKING WATER
DYNAMICS
GASES
HYDROGEN
Industrial Chemistry and Chemical Processing
IRON
MAGNETITE
MICROORGANISMS
MINERALS
MORPHOLOGIES
MORPHOLOGY
PIPES
Properties of Metals and Alloys
Pumps, Filters, Pipes, Tubing, Fittings & Vlvs
TUBE-SHAPED CORROSION
WATER DISTRIBUTION
WATER SUPPLIES
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Summary:Dynamic templating as a result of cathodic hydrogen gas production is suggested as a possible mechanism for the formation of tube-like corrosion products on an unlined cast iron pipe in a drinking water distribution system. Mounds of corrosion product, with protruding tubes and freestanding tubes, were observed within a single 30 cm section of piping. Internal morphologies for all shapes were texturally complex although mineralogically simple, composed of two iron oxide/oxyhydroxides minerals: alpha-FeOOH (goethite) and Fe304 (magnetite). Static templating by either microorganisms or minerals was rejected as a possible mechanism for tube formation in this study.