icorr is corrosion current density, entered here in microamps per cm2.

What is equivalent weight?

Equivalent weight reflects alloy chemistry and reaction valence for corrosion-rate conversion.

Does this replace electrochemical interpretation?

No. Tafel fitting assumptions and surface state must be reviewed separately.

ToolsConductScience tool

CorrosionFree in-browser calculator

Tafel Corrosion Rate Calculator.

Convert corrosion current density into average corrosion-rate units. For materials research, education, and protocol documentation only. Not a certified inspection, compliance, asset-integrity, or final acceptance tool.

Run calculator Request a Quote

PrivateData stays in your browser

LiveNo sign-up required

Validated2026-05-24

CitableMethods and citation included

Calculator

Results update in place

Try it out

Load example tafel corrosion data to see the full workflow

Tafel Corrosion inputs

icorr

uA/cm2

Equivalent weight

Density

g/cm3

Results

Corrosion rate

5.506 mpy

Corrosion rate

0.13956 mm/year

icorr

mpy

5.506

Review notes

Tafel extrapolation is sensitive to fit region, uncompensated resistance, and surface condition.

Methods note

Uses standard icorr conversions: mpy = 0.129 * icorr * equivalent weight / density, mm/year = 0.00327 * icorr * equivalent weight / density.

Scope and limitations

For materials research, education, and protocol documentation only. Not a certified inspection, compliance, asset-integrity, or final acceptance tool.

Results are deterministic calculations from the values entered here. Review units, assumptions, and measurement quality before using outputs in reports or protocols.

Method

Uses the tool-specific formulas and assumptions shown in the calculator output.

Validated

Last validated 2026-05-24. Calculations are designed for planning and documentation support; verify procurement decisions against manufacturer specifications or institutional SOPs.

How to cite

How to Cite

Tafel Corrosion Rate Calculator (1.2.0). ConductScience, Inc. 2026. Available at: https://conductscience.com/tools/tafel-corrosion-rate-calculator

For materials research, education, and protocol documentation only. Not a certified inspection, compliance, asset-integrity, or final acceptance tool.

Frequently asked

325

Free tools

1,200+

Institutions

100%

Client-side

Uploads required