Sacrificial anode sizing calculator
Enter the steel surface area to protect, the design life and the environment → get the current demand, the total anode mass and the number of anodes, calculated to DNV-RP-B401 and ISO 12696 — enough to set a budget and ask for a quotation.
Site data
e.g. hull below the waterline · the immersed face of piles · buried pipe surface (the metal area in contact with water or soil)
The sounder the coating, the fewer anodes you need (coating breakdown factor fc = 0.35)
Only the metals suited to the selected environment are offered · DNV-RP-B401 · TIS 3359-2565
Preliminary result
Preliminary estimate for budgeting and enquiry only — computed from the standard formulas (DNV-RP-B401 / ISO 12696 / NACE SP0169) using mid-range current densities and coating breakdown factors. Actual figures depend on a site survey, water temperature and velocity, soil resistivity, the geometry and resistance of the selected anode model, and electrical continuity. Corrosion protection of hulls, piers, bridges, and load-bearing structures affects safety and service life — a design engineer must review and certify the system before purchase and installation.