Cathodic corrosion protection for an aluminum-containing substra

Details Cathodic corrosion protection for an aluminum-containing substra Cathodic corrosion protection for an aluminum-containing substra

1991-08-08

1994-08-16

Tung, T.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204196, C23F 1300

Patent

active

053384172

ABSTRACT:
Cathodic corrosion protection for surfaces of metallic substrates is provided by carrying out electrolysis, switching off the electrolysis, observing a control voltage and switching on the electrolysis again when the control voltage equals a specified critical voltage. A counterelectrode, which does not corrode significantly by an electrolyte, is provided as an anode. A surface of a substrate services as a cathode. A reference electrode provides a constant electrochemical potential relative to the electrolyte. A potentiostat brings about the electrolysis in the electrolyte. A controller switches on and off the electrolyzing voltage based on a value of the control voltage relative to the specified critical voltage.

REFERENCES:
patent: 3142631 (1964-07-01), Woodley
patent: 3242064 (1966-03-01), Byrne
patent: 3634222 (1972-01-01), Stephens
patent: 4080272 (1978-03-01), Ferry et al.
patent: 4528460 (1985-07-01), Staerzl
patent: 4713158 (1987-12-01), Lambert
patent: 4841988 (1974-10-01), Gleason

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