How to remove rust / Verdigris in regulators

[Tim1966]

Hi fellow divers

Can anyone recommend on what chemicals / sanding? Require during regulator service.

I have used dishwashing liquid with brush, followed by 1:1 vinegar and 50’c water in ultrasonic cleaner for 10 minutes and this is what is left off.

Thank you for your advice

 

[Pearlman]

I just learnt the trick of using 10% Hydrocloric Acid solution recently… give it a soak for 3 mins and see?

 

[Lorenzoid]

Looks like the vinegar solution removed the verdigris, and what is left showing is the bare brass. Am I wrong?

 

[BoltSnap]

1:1 vinegar and 50’c water in ultrasonic cleaner for 10 minutes

Too long in cleaner.

 

[Tim1966]

Looks like the vinegar solution removed the verdigris, and what is left showing is the bare brass. Am I wrong?

This is an aqualung unbalanced piston

Unlike MK2 with bushing and plastic cover on the piston - the aqualung is just a bare metal spring against the piston and the regulator body… I guess that’s what made the mark there

 

[Bigbella]

I just learnt the trick of using 10% Hydrocloric Acid solution recently… give it a soak for 3 mins and see?

We used a ten percent solution of the phosphoric acid / detergent product , hempocid, for years, followed by serial fresh water washings; but, from what I can see in the OP’s photo, it looks like bare brass and not corrosion . . .

 

[axxel57]

This is an aqualung unbalanced piston

Unlike MK2 with bushing and plastic cover on the piston - the aqualung is just a bare metal spring against the piston and the regulator body… I guess that’s what made the mark there

Yes, the spring scratched the chrome surface, and the ultrasound cleaner removed it, so you're down to brass.....