Finishing worked example

Pretreatment Chemical Usage with pretreatment chemical feed rate of 63 gal / hr: a worked example

What does the result look like when pretreatment chemical feed rate reaches 63 gal / hr? The full calculation is worked below with real intermediate numbers. Use this calculator for practical powder coating or surface finishing planning, quoting, troubleshooting, or line setup.

The inputs for this scenario

  • Pretreatment chemical feed rate: 63 gal / hr (raised for this scenario; the documented default is 25)
  • Wash line runtime this shift: 8 hr (unchanged)
  • Delivered chemical unit cost: 0.75 $ / gal (unchanged)

Working through the calculation

  • Applying the documented formula (Consumption = use rate × runtime) to the inputs above produces each figure below.
  • At this operating point the engine returns 378 $ / shift for run cost, the number this scenario is built around.
  • At this operating point the engine returns 504 units for consumption.
  • At this operating point the engine returns 8 hr for runtime.
  • At this operating point the engine returns 0.75 $ / unit for unit cost.

How this compares with the baseline

  • Against the tool's baseline example, where pretreatment chemical feed rate sits at 25 gal / hr and the headline result is 150 $ / shift, this scenario comes in 152% above the baseline at 378 $ / shift.
  • A figure at this level is achievable when pretreatment chemical feed rate is genuinely sustained, not just peaked for a shift. It assumes a constant feed rate; automated conductivity or titration control that varies dosing to load will make actual usage rise and fall around this estimate.

Results at a glance

  • Run cost: 378 $ / shift (headline result)
  • Consumption: 504 units
  • Runtime: 8 hr
  • Unit cost: 0.75 $ / unit

Run it with your numbers

  • Every input above is editable in the live Pretreatment Chemical Usage calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.