Parameters
Presets
Pipeline / Structure
Total Surface Area A (m²)
100 m²
Coating Efficiency η_c
0.90
Bare area = A × (1−η_c)
Protection Current Density i_f (mA/m²)
20 mA/m²
Anode Material
Anode Material
Anode Efficiency η_a
0.85
Mass per Anode (kg)
7.0 kg
Design Life T_life (years)
20 yrs
Soil / Environment
Soil Resistivity ρ_soil (Ω·cm)
1000 Ω·cm
Anode Length L (m)
0.50 m
Pipeline Length L_pipe (m)
500 m
—
Protection Current I_cp (A)
—
Required Anode Count N
—
Total Anode Mass (kg)
—
Anode Service Life (yrs)
—
Anode Resistance Ra (Ω)
—
Protection Status
Pipe Cross-Section & Anode Layout Schematic
Pipe-to-Soil Potential E(x) Along Pipeline
Design Equations
Protection current: $I_{cp} = i_f \times A_{bare} = i_f \times A \times (1-\eta_c)$
Anode consumption: $m_a = \dfrac{I_{cp} \times T_{life} \times 8760}{\varepsilon \times \eta_a}$
Dwight formula (vertical rod anode resistance): $R_a = \dfrac{\rho_{soil}}{2\pi L}\left(\ln\dfrac{4L}{d}-1\right)$
Potential attenuation: $E(x) = E_0 \cdot e^{-\alpha x}$
CAE Integration: Setting cathodic protection current boundary conditions in pipeline corrosion simulation. Used as a design verification tool for electrochemical FEM (COMSOL Corrosion Module, etc.) and NACE SP0169 compliance check.