[MandoMan]

Originally Posted by Topspinmo

IMO surface corrosion from either Florida moist air (humidity) or galvanic corrosion from two dissimilar metals. First spray the fitting with soapy solution see it got any tiny leaks. Then, clean it with wire brush as suggested and paint with rust preventer. Or just regular metal paint like rustoleum. After dries spray it again with soapy water solution. No bubbles? good to go.

Or it you really think it unsafe call gas company or plumber.

Quote from Google AI.

Yes, in Florida, licensed plumbers are qualified to work on natural gas lines, meaning they can install, repair, and maintain them; however, they may need additional certifications depending on the specific gas line work involved.
Key points about plumbers and gas lines in Florida:
Legal requirement:
According to Florida regulations, only licensed plumbers can work on natural gas lines.
Specific certifications:
While a standard plumbing license allows for basic gas line work, specialized certifications might be needed for complex installations or repairs.
Safety considerations:
Due to the potential dangers of gas leaks, it is crucial to always use a licensed plumber for any gas line work.

Well said. That’s not severe corrosion. It’s a standard coating of protective rust.