Posted by Dave on February 18, 2005 at 14:22:49:
In Reply to: Re: Cold Galvanizing paint worthless posted by Chuck Tribolet on February 18, 2005 at 12:45:47:
I am not sure if steel tanks are heat treated after they are galvanized or before, as hit dipping is in the 850-900 degree range albeit not for very long, hence the "dip" name. Effective zinc coatings can be applied in as little as a 5 second dip, which is unlikely to raise base metal temperatures of heavy steel past the point wherein any heat treament is likely affected.
In any event, there is a process wherein molten zinc is sprayed onto cylinders rather then immersed, and in retrospect, I believe this is the more common treatment of compressed gas cylinders.