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Los especialistas galvanizados de la pipa
Creador de la pipa de la regadera GAL-5 y
GAL-7
Sistemas de IDOD, LLC PO BOX 1635
Homewood, Illinois 60430
Las bacterias sabidas para causar microbiolσgico
influenciaron la corrosiσn. Se saben muchas mαs bacterias, pero en esta tabla
particular, 11 se enumeran con el acero que ataca 8, pero solamente 1 cinc que
ataca
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Copied from Principles and
Prevention of Corrosion, 2nd ed. - Dennny A. Jones; page 374 - 375 |
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TABLE 11.3 |
Bacteria Known to Cause
Microbiologically Influenced Corrosion |
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pH |
Temperature |
Oxygen |
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Genus
of Species |
Range |
Range oC |
Requirement |
Metals Affected |
Action |
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Bacteria |
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Desulfovibrio |
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Best Known: |
D.
desulfuricans
.. |
4-8 |
10-40 |
Anaerobic |
Iron and
Steel, |
Utilize
hydrogen in |
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Stainless Steels, |
reducing SO42- to S2- |
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Aluminum, |
and H2S: promote |
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Zinc, |
formation of sulfide |
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Copper Alloys |
films |
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Desulfotomaculum |
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Best Known: |
D.
nigrificans |
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(also known as Clostridium)
. |
6-8 |
10-40 |
Anaerobic |
Iron and
Steel, |
Reduce SO42-
to S2- and |
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(some 45-75) |
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Stainless Steels |
H2S (spore formers) |
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Desulfomonas
.. |
.. |
10-40 |
Anaerobic |
Iron and
Steel |
Reduce SO42-
to S2- and |
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H2S |
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Thiobacillus
thioxidans
.. |
0.5-8 |
10-40 |
Aerobic |
Iron and
Steel, |
Oxidizes
sulfur and |
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Copper Alloys |
sulfides to form H2SO4; |
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Concrete |
damages protective |
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coatings |
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Thiobacillus
ferrooxidans
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1-7 |
10-40 |
Aerobic |
Iron and
Steel |
Oxidizes
ferrous (Fe2+) |
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to ferric (Fe3-) |
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Gallionella
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7-10 |
20-40 |
Aerobic |
Iron and
Steel, |
Oxidizes
ferrous (and |
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Stainless Steels |
manganous) to ferric |
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(and manganic); |
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promotes tubercule |
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formation |
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Sphaerotilus
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7-10 |
20-40 |
Aerobic |
Iron and
Steel, |
Oxidizes
ferrous (and |
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Stainless Steels |
manganous) to ferric |
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(and manganic); |
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promotes tubercule |
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formation |
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S.
natans
. |
.. |
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Aluminum
Alloys |
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Pseudomonas
.. |
4-9 |
20-40 |
Aerobic |
Iron and
Steel, |
Some
strains can reduce |
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Stainless Steels |
Fe3+ to Fe2+ |
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P.
aeruginosa
. |
4-8 |
20-40 |
Aerobic |
Aluminum
Alloys |
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Fungi |
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Cladosporium
resinae
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3-7 |
1-45 |
.. |
Aluminum
Alloys |
Produces
organic acids in |
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(best at |
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metabilizing certain |
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30-35) |
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fuel constituents |
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From S. C.
Dexter, Metals Handbook, Vol. 13, Corrosion, 9th ed., ASM International, p.
114, 1987. Reprinted by permission,
ASM International |
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NOTA: Las
bacterias enumeraron arriba son solamente 11 de muchos bacterias sabidos para
causar el MIC. Tambiιn suceden a menudo en las colonias en donde mϊltiplo las
bacterias trabajan junto - el " Una secreciσn de los bacterias es otro
manna" de los bacterias;. El punto de esta tabla para este folleto es ιse
solamente 1 de los 11 observσ en este cinc del ataque de la tabla mientras que
8 del acero de 11 ataques. No se galvaniza la respuesta al MIC, sino que es la
mejor segunda lνnea de defensa contra ιl. La prueba para el MIC y tratar el
agua se recomienda. Cuando el agua bacteriana sabida entra en contacto con las
paredes de la pipa en 5, 10, o mαs aρos porque el mιtodo de prueba del viaje
utiliza no mαs bioside, otra vez, la pipa galvanizada se convierte en que la
mejor segunda lνnea de defensa.