Does this predict an acid reaction rate?

No. It reports an observed average from coupon mass loss. Changes in chemistry, temperature or substrate need new measurements.

How should the coupon be prepared?

Use the same clean, dry weighing basis before and after etching. Remove residues according to the approved measurement procedure.

The removal model cannot interpret mass gain. Check drying, retained deposits and the weighing basis before using the result.

Only with separate evidence that removal remains linear under matching conditions. This calculator supplies no kinetic model.

Plating, Anodizing & Surface Treatment calculator

Convert a clean, dry coupon’s measured mass loss to mean removed depth and rate. Compare it with a limit for the same substrate and bath conditions.

Calculate observed mean etch depth per minute from a clean, dry coupon’s mass loss.

Initial Coupon Mass: Clean, dry coupon mass before etching.
Final Coupon Mass: Same coupon mass after rinsing and complete drying.
Etched Surface Area: Actual substrate area exposed to the etchant.
Substrate Density: Density of the coupon substrate.
Etch Time: Observed immersion time for this coupon.
Maximum Mean Etch Rate: Entered removal-rate limit for matching coupon conditions.

Best suited to matched coupon etch checks, observed removal rate comparisons.
Residues, oxide removal and retained liquid can distort mass loss. Observed mean rate does not predict future bath kinetics.

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Does this predict an acid reaction rate? No. It reports an observed average from coupon mass loss. Changes in chemistry, temperature or substrate need new measurements.
How should the coupon be prepared? Use the same clean, dry weighing basis before and after etching. Remove residues according to the approved measurement procedure.
What if final mass is higher? The removal model cannot interpret mass gain. Check drying, retained deposits and the weighing basis before using the result.
Can I project the rate to a longer time? Only with separate evidence that removal remains linear under matching conditions. This calculator supplies no kinetic model.

Last reviewed 2026-10-06.