Cathodic corrosion protection for an aluminum-containing substrate
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United States of America Patent
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Aug 16, 1994
Grant Date -
N/A
app pub date -
Aug 8, 1991
filing date -
Aug 8, 1990
priority date (Note) -
Expired
status (Latency Note)
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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.
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