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DACCO SCI, INC. Corrosion Engineering · Materials Technology · Electrochemistry |
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DACCO SCI, INC. Corrosion Engineering · Materials Technology · Electrochemistry |
DACCO SCI, INC., has teamed with Inhibitrol to test corrosion inhibitors from extracts of tobacco plants and other phytochemical materials. The extracts offer several advantages over traditional inhibitors, such as chromates:
The addition of tobacco extracts to salt water dramatically reduces the corrosion and coating degradation of painted steel and aluminum.
| 1 month | 3 months | 10 months | |
| Latex Paint
Left: With Tobacco Right: No Tobacco |
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| Oil-Based Paint
Left: With Tobacco Right: No Tobacco
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| Aluminum | Steel | |
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Bare metals are also protected in salt water by the
tobacco extract:
Left specimen: With tobacco -- No corrosion Right specimen: No tobacco -- Heavy pitting and corrosion or rusting |
The plant extracts are effective in a number of environments and conditions.
| Extracts from different tobacco strains and plant parts are effective in reducing the corrosion rate of aluminum and steel in salt water over a wide range of concentrations of tobacco extract. The extract is as effective as chromates. |  |
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In strongly acidic solutions used to clean rust and mill scale from steel, the acid also attacks the metal. Use of the metal reduces weight loss due to metal dissolution and provides a shiny surface. |
| Corrosion Sensors | Plant-Based Inhibitors | Field Activities | Importance of Corrosion | |||
| C.M. Dacres | G.D. Davis |
DACCO SCI, INC. ¤
10260 Old Columbia Road ¤
Columbia, MD 21046
(410) 381-9475 (Baltimore) ¤
(301) 596-7019 (Washington)
(410) 381-9643 FAX
dacres@daccosci.com
(Chester Dacres)
davis@daccosci.com
(Guy Davis)
©
2001, 2002 DACCO SCI, INC.
Please send any comments to dacres@daccosci.com
19 March 2003
