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A comment on You Spend More on Rust Than Gasoline (Probably).
You already get solar cathodic protection systems for underground steel pipes carrying gas and oil:
https://www.matcor.com/solar-powered-cathodic-protection-sys...
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You already get solar cathodic protection systems for underground steel pipes carrying gas and oil:
https://www.matcor.com/solar-powered-cathodic-protection-sys...