Galvanized pipe is perfect approved for above ground piping. Underground the preferred choice is PE, or coated black schedule 40 steel pipe with cathodic protection installed. Go check every natural gas meter setup and you will see galvanized piping. (A retired natural gas corrosion specialist/ district engineer/ operations manager).
Natural Gas Generators
- Thread starter IReallyLikePizza2
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Yup. I also have galvanized pipe outside on my generator. Paint will protect it from rust
Paint galvanized can prolong the life of the zinc coating, which by the way is a sacrificial metal that protects the underlying steel by generating a negative voltage (cathodic) to prevent corrosion.
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Zinc rich paint (cold galvanizing) sticks well, seems to last longer and blends over time. I'd use at least 93% zinc.
It works best directly on galvanized steel, then next on bare steel; can be applied over existing paint or coating if it is adhered well and shows no signs of peeling or flaking BUT not the best choice.
Inorganic zinc-rich paint seems more durable than organic in most applications. More here:
Coating Characteristics of Zinc-Rich Paint
Organic or inorganic zinc-rich paints are applied to a dry film thickness of 2.5 to 3.5 mils (64 to 90 µm). Adhesion bond strengths of zinc-rich paints…
Zinc-Rich Paint Coatings - Cold Galvanizing
Zinc-rich paint contains high levels of zinc dust or powder that works to combat corrosion. It is commonly referred to by the misnomer "cold galvanizing."
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You can spray it on paint, but you won't get any benefit from its protective zinc coating. The paint must be in contact with the steel to provide cathodic protection, otherwise you are wasting money.