What two conditions promote rusting?
helpmeplease
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The presence of oxygen and moisture.
The rust is the corrosion product which is formed from iron by oxidation with oxygen in the presence of water. Rust is generally composed of iron(II) oxide, iron(III) oxide and water of crystallization.
https://de.wikipedia.org/wiki/Rost#:~:text=red%20ist%20somit%20a%20water-containing,that%20h%C3%B6here%20temperature%20required%20w%C3%A4ren.
I was now the first to have the connection of moisture, salt and possibly heat.
See the sea
Other metals and salts.