A: The initial investment cost is low, and maintenance fees are generally not required during operation.
B: High utilization of protective current, no over-protection.
C: No interference or impact on nearby underground metal facilities; suitable for industrial areas, long-distance pipelines without power supply, and protection of small-scale scattered pipelines.
D: Provides grounding and protective functions.
E: Construction techniques are simple, no special maintenance or management required on a daily basis.
In the application of anti-corrosion for grounding equipment, the sacrificial anode protection technology is more superior than the impressed current protection technology, as the sacrificial anode directly connects the anode material to the protected grounding equipment without requiring a power source and requires no maintenance. It not only provides anti-corrosion protection but also aids in reducing the grounding resistance, hence its recognition and usage.
2)强制电流阴极保护 technology
Forced current cathodic protection involves串联 a DC power supply into the circuit, utilizing an auxiliary anode to direct DC current to the metal being protected, thereby turning it into a cathode and implementing the protective measure.
A: High drive voltage allows for flexible control of cathodic protection current output over a wide range, suitable for larger protection areas.
Applicable under severe corrosive conditions or high resistivity environments.
C: When using insoluble or slightly soluble auxiliary anodes, long-term cathodic protection can be achieved.
D: Each auxiliary anode bed has a broad protection range. When the pipeline anti-corrosion coating quality is good, the protection range of a cathodic protection station can reach dozens of kilometers.
E: Corrosion-resistant coatings on pipes with poor quality can still achieve complete cathodic protection.
To achieve maintenance-free goals, it is advisable to use sacrificial anodes for the anti-corrosion of the grounding line device. The reason is that the anode, once buried underground, requires no maintenance. Another crucial factor is that the filling material of the anode has a significant effect of reducing resistance.
