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Microanalysis of Thermal-Sprayed Titanium Anodes for Cathodic Protection of Reinforced Concrete Bridges

Published online by Cambridge University Press:  02 July 2020

W. K. Collins ,
S. D. Cramer ,
B. S. Covino Jr. ,
G. R. Holcomb ,
S. J. Bullard ,
R. D. Govier ,
R. D. Wilson  and
G. E. McGill
W. K. Collins
Affiliation:
, Albany Research Center, U.S. Department of Energy, Albany, OR, 97321
S. D. Cramer
Affiliation:
, Albany Research Center, U.S. Department of Energy, Albany, OR, 97321
B. S. Covino Jr.
Affiliation:
, Albany Research Center, U.S. Department of Energy, Albany, OR, 97321
G. R. Holcomb
Affiliation:
, Albany Research Center, U.S. Department of Energy, Albany, OR, 97321
S. J. Bullard
Affiliation:
, Albany Research Center, U.S. Department of Energy, Albany, OR, 97321
R. D. Govier
Affiliation:
, Albany Research Center, U.S. Department of Energy, Albany, OR, 97321
R. D. Wilson
Affiliation:
, Albany Research Center, U.S. Department of Energy, Albany, OR, 97321
G. E. McGill
Affiliation:
Research Unit, Oregon Department of Transportation, Salem, OR, 97310
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Extract

This paper addresses the microanalysis techniques used to characterize thermal sprayed Ti coatings on concrete surfaces as anodes in impressed current cathodic protection (ICCP) systems. Thermal sprayed Ti anodes on concrete were electrochemically aged in laboratory studies of anode performance and service life. A thermal sprayed catalyzed Ti anode was installed on the Depoe Bay Bridge on the Oregon Coast in a field demonstration of the ICCP system. Both air and N were used as the atomizing gases during the study. Thermal sprayed Ti coatings are typically applied in an inert atmosphere or vacuum using shrouds or chambers to prevent reactions with the atmosphere. This was not possible with a structure as large as a bridge.

Microanalysis of Ti and N together is difficult and the effects of O add to the complexity of the analysis. The ternary Ti-O-N system has not be well studied.

Type
Microscopy and Microanalysis in the “Real World”
Information
Microscopy and Microanalysis , Volume 4 , Issue S2: Proceedings: Microscopy & Microanalysis '98, Microscopy Society of America 56th Annual Meeting, Microbeam Analysis Society 32nd Annual Meeting, Atlanta, Georgia July 12-16, 1998 , July 1998 , pp. 486 - 487
Copyright
Copyright © Microscopy Society of America

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References

References:

1.McGill, G. E., et al., Field Application of an Arc-Sprayed Titanium Anode for Cathodic Protection of Reinforcing Steel in Concrete, Interim Report, Salem, OR, Oregon Department of Transportation and Federal Highway Administration, Oregon SP&RP 5265, (1996) 116.Google Scholar
2.Cramer, S. D. et al., Arc -Sprayed Titanium Anode for Cathodic Protection of Reinforcing Steel in Coastal Concrete Bridge, to be published in Proc. Ann. IMS Meeting 30(1997).Google Scholar