Tank Bottom SACP Anode Design Calculator — Automated Excel Tool (NACE/AMPP + API 651)

A complete, automated worksheet for sizing sacrificial anode cathodic protection on aboveground storage tank bottoms. Enter your design inputs; get a code-aligned anode design, adequacy checks, and a ring-based layout proposal in minutes — with a built-in NACE/AMPP-style report generator.

What it does

This tool automates the full SACP design calculation for internal storage tank bottoms in water-wetted service. Enter tank geometry, water resistivity, current density, coating and shielding factors, and design life — and the calculator returns total current demand, required anode mass, anode quantity governed by both mass and current output, estimated achieved design life, and an automated anode layout with per-anode coordinates.

What's included

• Automated SACP design calculator (multi-sheet Excel workbook)
• Editable anode library (zinc, aluminium, magnesium) with default capacities, efficiencies and utilization
• Automated ring-based anode layout proposal with X/Y coordinates
• Layout & commissioning monitoring sheet (native, instant-ON, polarized potential records)
• Built-in NACE/AMPP-style PDF report generator
• Reference sheets: current density, coating breakdown, anode composition limits
• Design Basis & User Guide (PDF/Word)
• License terms

Who it's for

Corrosion engineers, integrity engineers, CP designers, and vendor technical reviewers who need a fast, structured, repeatable design tool instead of building spreadsheets from scratch.

Why it saves you time

What normally takes the better part of a day — current-demand sizing, anode mass and output checks, life verification, and a manual layout — becomes a 15-minute, auditable exercise. Every result maps to a calculation row, so the design is traceable and defensible in review.

Standards basis

Calculations follow AMPP/NACE SP0169 and SP0193 context with API 651 cathodic protection practice. Outputs are decision-support and must be verified by a qualified CP specialist against the governing standards and project criteria for your specific application.

Format

Microsoft Excel (.xlsx), works in Excel desktop. The optional report generator uses a supplied Python script (openpyxl + reportlab) or Excel's native PDF export.