Cathodic Protection Technology | Libo Corrosion Protection

Technology

Understand sacrificial-anode and impressed-current routes, system components, selection steps and monitoring interfaces.

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Cathodic protection technology and monitoring

Two protection routes

Understand the route before choosing the component

Sacrificial-anode and impressed-current protection use different current sources and system components. Both depend on the asset and environment.

Sacrificial-anode cathodic protection

A more negative-potential metal or alloy is connected to the protected structure and is consumed while supplying protective current.

Magnesium, aluminum and zinc sacrificial anode ranges
Material and form selection by medium, structure and installation
Buried, seawater and seabed application directions

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Impressed-current cathodic protection

A potentiostat, auxiliary anode and anode bed supply protective current, with reference electrodes supporting measurement and adjustment.

Deep-well and shallow-buried anode beds as system forms
High-silicon cast iron and noble-metal-oxide auxiliary anode directions
Power, protection range and construction conditions must be reviewed together

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System interfaces

Materials, monitoring and field work are connected

Materials and system interfaces

Sacrificial anodes, impressed-current products, monitoring and installation accessories can be organized around one protected asset.

Selection by project conditions

Confirm the asset, medium, soil or water, installation position and drawings before matching material, form and system.

Monitoring and operational checks

Test posts and reference electrodes support potential, current and operational checks and should be considered with the main system.

Design and construction support

Beyond material supply, project discussions can include system direction, installation coordination and construction interfaces.

Selection steps

Use project information to narrow the route

Keep the technical route, product form and monitoring interface aligned with the protection range and installation conditions.

Define the protected asset

Pipelines, tanks, vessels, port steel piles and offshore structures.

Collect conditions

Soil, seawater, freshwater, tidal zones, coating and construction boundaries.

Select the route

Sacrificial anode, impressed current or a combined system direction.

Match products and monitoring

Material, form, test post, reference electrode and installation accessories.

Prepare project information

Drawings, quantity, protection range, power and delivery location.

Discuss a technical requirement

Technical reading

Continue with focused notes

How do the two routes differ?

Both routes control corrosion through cathodic polarization, but the current source, system components and project inputs differ.

Read the technical note

Why start with three sacrificial-anode materials?

Magnesium, aluminum and zinc are useful material entry points, while the final form still depends on the medium, asset and installation conditions.

Compare material directions

Why is deep-well anode a system form?

Deep-well anode describes an anode-bed arrangement and should be considered with auxiliary anodes, power, wiring, backfill and monitoring.

Review system components