Electrolysis: processes – compositions used therein – and methods – Electrolytic analysis or testing – For corrosion
Patent
1998-06-08
2000-10-17
Bell, Bruce F.
Electrolysis: processes, compositions used therein, and methods
Electrolytic analysis or testing
For corrosion
2057755, 205776, 205777, 204404, 324 711, 324693, 324700, G01N 1704
Patent
active
061325937
ABSTRACT:
An electrochemical method for measuring localized corrosion and other heterogeneous electrochemical processes is described. A multi-sensor electrode namely the wire beam electrode, integrated by coupling all its wire terminals together, is used to simulate a conventional one-piece metal electrode surface in electrochemical behavior. The working surface of the wire beam electrode is exposed to an electrolyte as a conventional one-piece electrode to allow heterogeneous electrochemical processes such as localized corrosion to occur. Electrochemical parameters at local areas of the wire beam electrode surface are detected by means of wires located at those areas. A zero resistance ammeter is inserted between each selected wire terminal and all other coupled wire terminals to measure the coupling current flowing into or out the selected wire, and thus a coupling current distribution map is produced. A high impedance voltmeter is used to measure the electrochemical potential of each temporarily uncoupled wire versus a reference electrode, and thus an electrochemical potential distribution map is produced. A polarization resistance measuring apparatus is used to measure the polarization resistance of each temporarily uncoupled wire, and thus a polarization resistance distribution map is produced. These electrochemical parameters and maps are used to determine the kinetics of heterogeneous electrochemical processes using equations described in this disclosure. This method and apparatus can be used to measure various forms of heterogeneous electrochemical processes such as localized corrosion, cathodic and anodic protection, electroplating, electro-machining, electrotyping and electrowinning.
REFERENCES:
patent: 4575678 (1986-03-01), Headky
patent: 5139627 (1992-08-01), Eden et al.
patent: 5411646 (1995-05-01), Gossett et al.
patent: 5437773 (1995-08-01), Glass et al.
Yong-Jun Tan, The Effect of Inhomogeneity in Organic Coatings on Electrochemical Measurement Using a Wire Beam Electrode, Part I, Progress in Organic Coatings, 1991, pp. 89-94, vol. 19, Elsevier Sequoia, Netherlands, No Month Available.
Yong-Jun Tan and Yu Shiti, The Effect of Inhomogeneity in Organic Coatings on Electrochemical Measurement Using a Wire Beam Electrode, Part II, Progress in Organic Coatings, 1991, pp. 257-263, vol. 19, Elsevier Sequoia (Publisher), Netherlands, No month available.
Yong-Jun Tan, A New Crevice Corrosion Testing Method and its Use in the Investigation of Oil Stain, Corrosion, 1994, pp. 266-269, vol. 50, NACE International, U.S.A, No month available.
Chi-Lan Wu, Xie-Jun Zhou and Yong-Jun Tan, A Study on the Electrochemical Inhomogeneity of Organic Coatings, Progress in Organic Coatings, 1995, pp. 379-389, vol. 25, Elsevier Science S.A., Switzerland, No month available.
Yong-Jun Tan, Wire Beam Electrode: A New Tool for Localised Corrosion Studies, Proceedings of Australasian Corrosion Association Corrosion & Prevention 97, Nov. 9-12, 1997, Paper No. 52, Australasian Corrosion Association (Publisher), Australia.
Yong-Jun Tan, Monitoring Localized Corrosion Processes and Estimating Localized Corrosion Rates Using a Wire-Beam Electrode, Corrosion, 1998, pp. 403-413, vol. 54, NACE International, U.S.A., No month available.
Yong-Jun Tan and Yu Shiti, Study and Evaluation of Organic Coatings by Use of a Wire Beam Electrode; Proceedings 7.sup.th Asian and Pacific Corrosion Control Conference, Beijing, p. 671 (Cumulative Publication), No month/year available.
Yong-Jun Tan and Yu Shiti, Study and Evaluation of Organic Coatings by Use of a Wire Beam Electrode; Materials Protection (China), vol. 25, No. 6, pp. 6-23 (1992) (Cumulative Publication), No month available.
Wu C.L., Zhong, Q. D. and Jin, J.C. Study on Electrochemical Inhomogeneity on Oil-Painted Metal, Corrosion Science and Protection Technology (China), vol. 8, No. 3, p. 256 (1996) No month available.
Huang, G. F., Wu, C.L. and Jin, J.C. Study on Protective Behaviour of Rust Preventing Oil by Wire Beam Electrode; Materials Protection (China), vol. 29, No. 4, p. 9 (1996), No month available.
LandOfFree
Method and apparatus for measuring localized corrosion and other does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for measuring localized corrosion and other, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for measuring localized corrosion and other will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-464968