Cathodic Protection Design

Calculate current demand, number of anodes, anode life, and rectifier sizing.

Pipe OD (in)

Pipe Length (ft)

Coating Efficiency (%)

Current Density (mA/ft²)

Design Life (years)

Anode Type

Anode Weight (lb)

Consumption Rate (lb/A-yr)

Utilization Factor

Soil Resistivity (ohm-cm)

Bare Area

ft²

Current Demand

Anodes Required

count

Anode Life

years

Rectifier (V/A)

sizing

Method

Bare area = pipe surface area × (1 - coating efficiency).

Current = bare area × current density.

Anode life = (weight × utilization) / (consumption rate × current per anode).

ICCP rectifier sized at 1.5x current demand with 25% voltage margin. Per NACE SP0169.

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