Coastal Erosion Calculator
Design cathodic protection systems for submerged steel structures using sacrificial anodes. Calculate current demand, anode mass, count, and resistance per DNV-RP-B401.
Inputs
Results
Total current demand (A)
60
Total anode mass required (kg)
8,212.5
Number of anodes
33
Actual mass installed (kg)8,250
Single anode resistance (Ω)0.14
Total circuit resistance (Ω)0
Current capacity ratio1.01
How to Use This Calculator
- Enter bare steel area (m2) requiring cathodic protection.
- Enter design current density (mA/m2) for the environment: tropical ~150, temperate ~100, arctic ~80.
- Enter design life (years), anode capacity (Ah/kg), and mass per anode (kg).
- Read total current required (A), number of anodes needed, and total anode mass (kg).
- Verify anode spacing and coverage meets DNV-RP-B401 or project specification requirements.
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