system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What is the difference between anodizing and galvanizing?
gpt
Anodizing produces a stable oxide coating on the material - usually aluminium - which prevents further degradation.

Galvanising deposits a layer of corrosion-resistant zinc onto (usually) steel. Not only is zinc quite resistant to corrosion anyway, but it also forms an electrochemical pair with the steel which makes it electrically unfavourable for the steel to rust. There's another benefit - the zinc coating can to some extent self-repair, because the battery effect re-plates scratches and minor dings.