The Stainless 37 hat

Just bought the 37 ss hat from divers supply recently.  Definitely the best hat I've ever worn.  Breathes great, feels great, and NO spot rust.  Anybody else have one?  How do you guys feel about it?

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Permalink Reply by Martin Morris on March 8, 2010 at 1:34pm
Steve, We do custom helmets also. I have plans at the machine shop for sideblocks with the hoses going to the rear or down. The Poseidon Xstream regulators we use on the production model "Gladiators" need only 120 psi over bottom pressure. Or you can send the regulator you want us to use. I did a retrofit on an early model "Gladiator" using a superflow 450 regulator and dual exhaust whisker kit supplied by the client. I put a neckdam flange on another hat to use a 17 neckdam as requested by a diver in Hawaii. So we make it like you want it.
Permalink Reply by John Carl Roat on March 6, 2010 at 1:32pm
TL

Congratulation on your new hat. I do love my 77. The one thing I had to get used to, was having a handle on my Hat, my Savoie‘s don’t. Make sure you remove the handle on occasion, especially if you have been burning and clean behind the matting surfaces. STEEL IS FOR EVER!!!
Permalink Reply by steve henshaw on March 6, 2010 at 3:31pm
How do you find the balance of the 77ss or did you need a weight

Steve h
Permalink Reply by TL on March 6, 2010 at 6:46pm
Flynn, there is no weight on the 37SS model. It was perfectly engineered to eliminate the weights that a fiberglass 37 has. The 350 superflow regulator on the SS model sits on a 'pod' which is interchangeable with any regulator that one may have.
Permalink Reply by Dive Diva on March 8, 2010 at 5:22am
The spots visible on the earlier SS were not rust. Rust is oxidation, the spots were a biofilm.

Ask any marine engineer and they will tell you that SS especially 316L is not
recommended for subsea applications
especially life support equipment.
Permalink Reply by Dive Diva on March 8, 2010 at 5:25am
One other note, Zinc is not the proper choice of anode to use with Stainless Steel.
Permalink Reply by steve henshaw on March 8, 2010 at 5:47am
but its better than nothing at all.

What maybe of interest also, I was surprised some years ago when I found out that you can over anode a vessel or what ever.

steve h
Permalink Reply by Dive Diva on March 8, 2010 at 11:56am
Actually you're probably better off with nothing at all. What happened when you over anoded the boat?

To prevent galvanized corrosion you need to use an anode from the same grouping or very near the same grouping as the SS. Since 316 can be active (anodic) or passive (cathodic) you need to know which end of the spectrum you're working with. I've been told the wrong anode can weaken the metal around it making it more susceptable to stress corrosion and thus failure. Furthermore, you wouldn't notice the changes, they use ultrasound and xrays to check the metal.
Permalink Reply by steve henshaw on March 11, 2010 at 12:09pm
answer to your first line,
the bottom drops out and leaves the anodes un touched good eh or was that agghhhhhhh.

steve h
Permalink Reply by TL on March 8, 2010 at 7:15pm
Look, I didn't engineer the SS hats. It's not like I'm hanging it on a line below the surface for days at a time. I rinse it when i'm topside and take care of it the way it's supposed to be. And guess what...no 'biofilm', I mean spot rust. And if you talk to any reputable hat technician they will tell you why the first couple 77's were spot rusting, i.e. oxidation. Obviously, they fixed the problem. And the last time I checked, the SS hats including the Gorski, were ALL recommended for subsea applications.

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