Thanks Chris -- yes Johns stuff was good, and I also bought the Mig book "The Modelling Guide for Rust and Oxidation"
Now your talking my kind of language,
oxidation, gain or loss of electrons, now which is it?
Is rusting merely oxidation or is some hydration involved there too?
What is rust, some kind of hydrated Iron oxide, but how many water molecules and is it just iron (II) or iron (III) or a mixture.
You just brought back some great memories, ah well, back to lockdown.