CorroZone Podcast · 16 Jun 2026
Faraday's Law
- Free
- Lecture
- Beginner
- ~28 min
Faraday's law as the quantitative bridge between electric current and metal loss: equivalent weight, converting a corrosion current density into a corrosion rate (mm/year and mpy), estimating mass loss and service life, and the caveats in applying the law to real corrosion systems.
Show notes
What you'll learn
- State Faraday's law and write the central equation m = Q·We/F
- Define equivalent weight and calculate it for common engineering metals given molar mass and valence
- Convert between current density (μA/cm²) and corrosion rate (mm/year, mpy) using the standard conversion formula
- Calculate mass loss from a given charge or current and exposure time
- Estimate service life from a measured corrosion rate and known corrosion allowance
- Identify the main limitations and caveats in applying Faraday's law to real corrosion systems
Who this is for
Anyone beginning their study of corrosion — students, engineers, and technical staff who want a solid foundation in why metals corrode and what can be done about it. No prior background assumed.
What you'll learn
- State Faraday's law and write the central equation m = Q·We/F
- Define equivalent weight and calculate it for common engineering metals given molar mass and valence
- Convert between current density (μA/cm²) and corrosion rate (mm/year, mpy) using the standard conversion formula
- Calculate mass loss from a given charge or current and exposure time
- Estimate service life from a measured corrosion rate and known corrosion allowance
- Identify the main limitations and caveats in applying Faraday's law to real corrosion systems