Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1980-03-20
1981-08-25
Andrews, R. L.
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
C23F 1300
Patent
active
042857872
ABSTRACT:
A method is provided herein for the electrochemical corrosion protection of a partly submersed, rotating, stainless steel drum in a vat containing a corrosive, oxidizing, chloride-containing bleach liquor. The method comprises the step of impressing a protection potential to the stainless steel drum at a predetermined voltage in the range of -600 to +400 mV.sub.Ag/AgCl. This predetermined voltage is sufficiently low to draw the stainless steel into a passive corrosion protection zone. However, that voltage is not sufficiently low to draw the stainless steel into a zone of uniform corrosion. Specific means for the placement of the anode in the vat are also provided.
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Garner Andrew
Laliberte Laurent H.
Andrews R. L.
Field Lawrence I.
Pulp and Paper Research Institute of Canada
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