FIELD: process engineering.
SUBSTANCE: invention relates to electrochemical protection of metals against corrosion and can be used for whatever pipe protection. Proposed method comprises feeding alternating current from power source, via AC circuit connected in series, onto surface to be protected. Note that AC potential in negative half-period exceeds positive half-period. Note also that alternating current is fed via adjustable ballast resistor to set potential magnitude equal to corrosion potential in negative half-period.
EFFECT: reduced corrosion rate.
1 dwg, 2 ex
