What the heck happened to my bolt snap?

Discussion in 'General Scuba Equipment Discussions' started by Brandon, Jan 20, 2012.

  1. Brandon

    Brandon Banned from the LDS... ScubaBoard Supporter

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    I've had this (stainless) bolt snap on my primary regulator for almost two years now. I sent my reg off for service and it came back looking like this:

    boltsnap.jpg

    Now it wasn't gorgeous before I sent it, it had plenty of corrosion on it (the dull gray kind) and I was just about ready to cut it off and replace it. But curious what may have caused the black oxidation...

    I'm thinking it was liberally soaked in a cleaning agent of some sort, and the cheap metal on the bolt snap didn't hold up to it...

    Any ideas?
     
    Last edited: Jan 20, 2012
  2. ScubaSteve

    ScubaSteve Wow.....what a DB

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    Is that one of them Home Depot models? :D And I think your guess is as likely as any.
     
  3. Tortuga68

    Tortuga68 Divemaster

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    Brass is class
    for freshwater dives
    but in salt water
    only stainless survives

    That doesn't really have anything to do with your thread, but I just thought it up and wanted to share it

    My guess would be the same as yours, cleaning agent
     
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  4. Brandon

    Brandon Banned from the LDS... ScubaBoard Supporter

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    Not from Home Depot, but not sure exactly where I picked up that one either. I have a lot of bolt snaps... I noticed last year that some I picked up from the dive shop have not been wearing very well at all; this could be one of them.
     
  5. jar546

    jar546 Scuba Instructor

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    Looks like the technician put your bolt snap in the ultrasonic cleaner and it also looks like it is not 100% stainless
     
  6. Fishpie

    Fishpie Scuba Instructor

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  7. Mud&Rox

    Mud&Rox Nassau Grouper

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  8. herman

    herman Divemaster

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    That's an old diving wifes tale, pretty much all I use is brass. Rinse it with the rest of the gear and a little wd-40 in the springs once in a while and they work fine. I don't recall ever changing one due to corrosion.

    As to the one in the photos that is some kind of reaction to a cleaning agent....my question is if it was attached to your hoses (guessing) why were the hoses in a cleaning agent in the first place.
     
  9. Akimbo

    Akimbo ScubaBoard Supporter ScubaBoard Supporter

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    Are you sure it wasn't nickle-plated brass? It looks like they put it in an ultrasonic cleaner with a mild acid for corrosion removal.
     
  10. jar546

    jar546 Scuba Instructor

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    That is what it looks like to me. This looks like the result of being in the ultrasonic cleaner a tad too long. Depends what was in the ultrasonic cleaner and how long it was in there, temp, etc,
     
  11. Kilili

    Kilili Manta Ray

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    First, sloppy work by the service dept. They should have removed first, then sent back with reg.
    Second, stainless would not have corroded from your use in the manner you described.

    I would agree with the assessment of nickel coated brass, with the nickel heavily corroded by some cleaning process and the brass showing from beneath.
    Nickel coated brass is a poor choice for salt water. Ordinary brass holds up much better. Maintain as stated in an earlier posting. Stainless steel is even better, but a bit more expensive.

    Ospho, as referenced earlier is a mixture of phosphoric acid and sodium dichromate, and used as a rust inhibitor coating. It turns iron oxide (rust) into inert iron phosphate. I know nothing about servicing regs, but cannot see how this stuff has any applicability, unless someone tried to use it to clean up the snap. Really don't know what it would do to nickel.
     
  12. Mr Carcharodon

    Mr Carcharodon Single Diver

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    From the color I'd say that is corrosion. What you probaby have is a plated bolt snap and not stainless steel. Nickel and cadmium are pretty common materials for plating. From the dark color I'd guess cadmium. The acids (and sometime bases) used for ultrasonic cleaning will accelerate the corriosion process.
     
  13. Brandon

    Brandon Banned from the LDS... ScubaBoard Supporter

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    Ordered another pile of bolt snaps from Reef Scuba and will be replacing any questionable ones... it's a minor annoyance, was more curious than anything.
     
  14. Mitchell Teeters

    Mitchell Teeters ScubaBoard Supporter ScubaBoard Supporter

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    Are you kidding? An LDS that is supposed to have your life in their hands actually sold a customer something cheap?? Goodness what is the world coming to?
     
  15. Brandon

    Brandon Banned from the LDS... ScubaBoard Supporter

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    Rofl, just had to go there, didn'tcha =p
     

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