Port, Crane & Terminal Equipment worked example

Corrosion Protection Cost at 47% high-exposure zone share: a worked example

Suppose high-exposure zone share falls to 47%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate corrosion protection cost for port crane steel from protected surface area, per-square-foot treatment cost, and the share in high-exposure zones.

The inputs for this scenario

  • Protected Steel Area: 5,200 ft2 (held at the documented default)
  • Protection Cost per Square Foot: 3.4 $/ft2 (held at the documented default)
  • High-Exposure Zone Share: 47 % (the input this scenario stresses; the baseline uses 65)
  • Cathodic Protection & Inspection: 9,500 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Corrosion cost = protected area x cost per ft2 x high-exposure share% + cathodic/inspection.
  • Total corrosion protection cost works out to 17,810 $ at these inputs, and this is the headline figure for the scenario.
  • Corrosion protection cost per unit works out to 3.42 $ / piece at these inputs.
  • Variable corrosion protection cost works out to 8,310 $ at these inputs.
  • Fixed corrosion protection cost adder works out to 9,500 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where high-exposure zone share sits at 65% and the headline result is 20,992 $, this scenario comes in 15.16% below the baseline at 17,810 $.
  • It computes the total corrosion protection spend by multiplying protected steel area, cost per square foot, and the high-exposure zone share, then adding fixed cathodic protection and inspection charges. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • Total corrosion protection cost: 17,810 $ (headline result)
  • Corrosion protection cost per unit: 3.42 $ / piece
  • Variable corrosion protection cost: 8,310 $
  • Fixed corrosion protection cost adder: 9,500 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Corrosion Protection Cost calculator, set high-exposure zone share to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.