Corrosion Rate Calculator (mpy / mm/yr)
Corrosion rate from coupon weight loss — the plant-inspection standard.
Refinery shorthand: < 1 mpy excellent, 1–5 good, > 10 act now. Multiply by remaining corrosion allowance to get remaining life — that's half of what inspection departments do.
Formula
Corrosion Rate Calculator (mpy / mm/yr) is a free corrosion rate for design engineers, metallurgists and QA inspectors — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About Corrosion Rate Calculator (mpy / mm/yr)
Corrosion rate from coupon weight loss — the plant-inspection standard. The calculation implements CR(mm/yr) = 87.6·W(mg)/(A(cm²)·t(h)·ρ) (ASTM G1/G31 — corrosion coupon practice). Refinery shorthand: < 1 mpy excellent, 1–5 good, > 10 act now. Multiply by remaining corrosion allowance to get remaining life — that's half of what inspection departments do.
How to use Corrosion Rate Calculator (mpy / mm/yr)
- 1Enter Weight loss in mg.
- 2Enter Exposed area in cm².
- 3Enter Exposure time in h.
- 4Enter Density in g/cm³.
- 5Read Corrosion rate, Rate instantly — no submit button needed.
Why use Corrosion Rate Calculator (mpy / mm/yr)?
- ✓Implements the standard formula — CR(mm/yr) = 87.6·W(mg)/(A(cm²)·t(h)·ρ)
- ✓Reference cited on-page: ASTM G1/G31 — corrosion coupon practice
- ✓Live worked example: the substitution recomputes from your numbers
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the Corrosion Rate Calculator (mpy / mm/yr) use?+
It computes CR(mm/yr) = 87.6·W(mg)/(A(cm²)·t(h)·ρ), per ASTM G1/G31 — corrosion coupon practice. The formula is displayed under the result along with a worked example substituted with your own inputs.
What should I keep in mind when using this calculator?+
Refinery shorthand: < 1 mpy excellent, 1–5 good, > 10 act now. Multiply by remaining corrosion allowance to get remaining life — that's half of what inspection departments do.
Where do the material property defaults come from?+
Defaults are standard handbook values (ASM, manufacturer datasheets, the cited standard). Always substitute certified values from your material's test certificate for critical work.
Is the Corrosion Rate Calculator (mpy / mm/yr) free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
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