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Gold plated contacts in salt water

Discussion in 'Electronic Design' started by Raveninghorde, Jul 18, 2013.

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  1. Anyone got experience od immersing gold plated contacts in salt water?

    I have a spec that requires the connector on our equipment to survive
    immersion in 3 foot of salt water.

    Is gold plating up to this?

    Thanks
     
  2. legg

    legg Guest

    I think they took that requirement out of the new NATO carbine spec.

    You get what the committee's willing to pay for.....

    RL
     
  3. Phil Allison

    Phil Allison Guest

    "Raving Looney"
    ** Yes, some - but not for long.

    ** Got news for you - pal.

    Salt water conducts electricity so nothing electrical can be immersed in it.


    ** FFS the connector needs to be WATERPROOF !!!!!!!



    .... Phil
     
  4. Waterproof connector.
    ITT Cannon makes MIL spec connectors.

    Cheers
     

  5. The spec says half the test samples should have exposed connectors

    When specified batteries shall be tested as follows.
    Weigh batteries and record their weight.
    The test samples shall be configured as follows: half in operating
    configuration (with sealed mating connector attached) and half in with
    dust cap removed. Immerse the batteries to a depth of not less than 3
    feet in salt water substitute conforming to ASTM D - 1141 for not less
    than 2 hours.
     
  6. Martin Brown

    Martin Brown Guest

    All bets are off then since the battery will generate free chlorine at
    the anode and gold chloride is moderately soluble once it is formed.

    http://en.wikipedia.org/wiki/Gold(III)_chloride

    Tell them that to meet their specifications only solid platinum
    connectors will be good enough (and academic since the batteries are
    likely to be ruined after 2 hours aggressive discharge in brine anyway).
     
  7. Phil Hobbs

    Phil Hobbs Guest

    ;)

    Reminds me of "Snoopy and the Red Baron".

    "He challenged the German to a real dog fight/while the Baron was
    laughing, he got him in his sights."

    _Not_ what you want if you're trying to get guerilla street cred.

    Cheers

    Phil Hobbs

    --
    Dr Philip C D Hobbs
    Principal Consultant
    ElectroOptical Innovations LLC
    Optics, Electro-optics, Photonics, Analog Electronics

    160 North State Road #203
    Briarcliff Manor NY 10510 USA
    +1 845 480 2058

    hobbs at electrooptical dot net
    http://electrooptical.net
     
  8. Glen Walpert

    Glen Walpert Guest

    Or use a sealed connector with an internal switch which cannot be closed
    without the sealed external connector in place, so there is no power
    applied to any pin when the external connector is removed, as is commonly
    done on ship shore power connectors for example. These have mechanical
    interlocks which prevent the switch being closed without the connector in
    place and also prevent the connector being removed without the switch
    being open; the same sort of mechanical interlock could automatically
    close the switch when the connector was seated if desired. There exist
    connector manufacturers with experience in this area, but I have long
    forgotten who they are. An electrical interlock is also a possibility,
    preferably with power to close the switch provided from the external
    connector, allowing the use of standard connectors.
     
  9. Syd Rumpo

    Syd Rumpo Guest

    On 19/07/2013 10:20, Martin Brown wrote:

    How about glassy carbon contacts...

    http://en.wikipedia.org/wiki/Glassy_carbon

    Cheers
     
  10. And some dreamers actually do deserve to be called dogs.
     
  11. Phil Allison

    Phil Allison Guest

    "Jeff Liebermann = LIAR "


    ** Piss OFF you fucking MORON !!!
     
  12. Robert Baer

    Robert Baer Guest

    Define "survive"; one could almost use metallic sodium..
     
  13. Robert Baer

    Robert Baer Guest

    * --- AKA "crystal set"? ---------------------------------------^
     
  14. Guest

    I've been in the remains of an AT&T microwave relay station. The
    fitting that brought the waveguides through the wall and provided the
    dry-air connections for them were still there (with a stamped date of
    1952), as was the air drier. For some unknown reason, the scrappers had
    also left the pressure switches that sent alarms if the air pressure
    dropped too much. They were still on the wall in their big round cans
    with "MERCOID" stamped into the cover.

    The phone company also used to supply small quantities of dry nitrogen
    for free from large roadside tanks, but now that they have decided to
    let the copper infrastructure rot, I hardly ever see them anymore.
    Why not leave the bottle at the bottom and climb with a hose? Maybe
    the hose is harder to deal with than the bottle, or there's nobody at
    the bottom to work the valve...

    Matt Roberds
     
  15. Thanks for the responses.
     
  16. Jasen Betts

    Jasen Betts Guest

    Can't use the pressurised heliax as a pipe?
     
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