"Rusty" pipes?

[Al Fresco]

The propane distribution manifold on my new 2011 Sunseeker 2300 appears to be constructed of galvanized pipe (or perhaps black pipe). While checking under chassis, I noticed that the manifold is uniformly coated with what looks like a thin, somewhat-powdery layer of yellowish rust. I am wondering if this is some type of protective coating that is applied to inhibit corrosion, or if it is something I should be concerned about.

Along the same lines, I am wondering if anyone has any experience using “Rust Converter (‘1’ Step Rust Killer)” or similar product to remove existing rust deposits and prevent additional corrosion.

Thanks for any input you can provide.

[jackhartjr]

I think that rust is just one of those things that happens with black pipe, nothing to worry about. Mine showed rust the first year, still looks the same 5 yars later.
Jack

[Al Fresco]

Thanks, Jack, for the info. After some further reading on the subject, I found that black pipe is commonly used for gas connections and that it is normal (even desirable) for it to oxidize. According to what I read, it forms ferrous oxide rust, as opposed to the ferric oxide rust that forms on galvanized pipe. The ferrous oxide layer serves as a protective surface that inhibits further oxidation. So, as you say, my concern about the rusted gas manifold appears to have been unjustified. It was just a bit of a shock to see so much rust forming on a component of a new motor home.

[jackhartjr]

No problem Al, I too was surprised. Actually black pipe is the 'code' for gas cannections.
Enjoy your Sunseeker...I see them on the road a lot...they are among the nicest out here!
Jack