Corrosion Rate from Current Density

Idealized uniform-corrosion penetration rate from Faraday’s law and current density.

Cathodic ProtectionEngineering Fundamentals

Idealized uniform-corrosion penetration rate from Faraday’s law and current density.

App id: CORR-02. Reference version 1.0.

How to fill it

Fill the inputs. The tool shows the outputs.

On the tool screen, Calc is the working sheet. Presets stores values you reuse. Reference is the formula, assumptions, and provenance below.

Formula

CR = j × EW / (F × ρ)

Inputs

Name	Unit
Corrosion current density	`uA/cm2`
Metal density	`kg/m3`
Equivalent weight	`g/eq`

Outputs

Name	Unit
Penetration rate (hero result)	`mm/year`

Diagnose

This tool does not attach diagnose observations.

Assumptions

Idealized uniform corrosion over the surface represented by the current density.

Provenance

ASTM G102 Faraday conversion. Equivalent-weight and alloy assumptions matter. F = 96485 C/eq.