Stuck Din to Yoke adapter

[Scared Silly]

Thanks for the posts that some regs/adapter were made from aluminum. Wow!! someone forgot to consult a metallurgist.

 

[ams511]

Thanks for the posts that some regs/adapter were made from aluminum. Wow!! someone forgot to consult a metallurgist.

The aluminum regs are marked with a UL after the name (MK-20UL or MK-18UL), I do not think that any other models were made out of aluminum. Probably some weenie in marketing decided that traveling divers would pay for lighter regs because of airline weight restrictions. Especially for travelers that use airlines that weigh carry-on baggage.

I may be remembering this wrong but aluminum and saltwater do not play well together so aluminum objects expected to be used in saltwater have a sacrifical anode made out of another metal that is designed to corrode instead of the aluminum. The anode gets replaced every so often. I don't remember the actual physics of why it works but it does. The OP's yoke adapter may be acting like a anode and corroding. Because he did not immediately seperate the parts it rusted to the din connector.

There is really nothing wrong with aluminum regs as long as you use them in fresh water or clean them very well after using them in saltwater. However, if any bit of saltwater remains on them it causes a big mess. Sorry the OP found out about that the hard way.

 

[ams511]

[So as Ams 511 mentioned he told me to add a bit of sislicone grease and make sure to remove these traces with a brush.[/QUOTE]

Apply it with your finger on the adaptor and wipe it out with a toothbrush or rag. You only want a thin coating not enough to see but enough to protect the parts. You do not want any of the grease entering the regulator. Also when done diving take the adaptor off immediately and soak it in fresh water. I would wipe off the din connector also with a rag soaked in fresh water. To be safe I would do this between dives also. The main problem I think is the salt water trapped in the threads between the adaptor and the din connection.

 

[Jonny boy]

The aluminum regs are marked with a UL after the name (MK-20UL or MK-18UL), I do not think that any other models were made out of aluminum. Probably some weenie in marketing decided that traveling divers would pay for lighter regs because of airline weight restrictions. Especially for travelers that use airlines that weigh carry-on baggage.

I may be remembering this wrong but aluminum and saltwater do not play well together so aluminum objects expected to be used in saltwater have a sacrifical anode made out of another metal that is designed to corrode instead of the aluminum. The anode gets replaced every so often. I don't remember the actual physics of why it works but it does. The OP's yoke adapter may be acting like a anode and corroding. Because he did not immediately seperate the parts it rusted to the din connector.
There is really nothing wrong with aluminum regs as long as you use them in fresh water or clean them very well after using them in saltwater. However, if any bit of saltwater remains on them it causes a big mess. Sorry the OP found out about that the hard way.

What about Aluminium backplates - have never seen a sacrificial anode on those?

 

[knowone]

Foreigan divers. No way make DIN screw aluminum me think.