Cleaning silver plated connector pins from Ag2S?

[50AE]

Is there a solution that can clean in a easy way, I mean, to dissolve the silver sulfide without the need of mechanical intervention? I have some Russian military screw power connectors that are Ag plated, but tarnished and will be hard to be mechanically cleaned.

Thanks!

 

[DUG]

Try this:
17 Apart: How To: Polish Silver in a Baking Soda & Salt Bath

I think each piece needs to touch the aluminum.

 

[JonSnell Electronic]

I use a fibre glass pen.
| Fibreglass Bristle PCB Cleaning Brush, 4mm diameter |
http://www.ebay.co.uk/itm/like/2811...=1007222&device=c&campaignid=738208994&crdt=0

 

[50AE]

I think each piece needs to touch the aluminum.

This works very good, but each pin, as you said, must touch the foil. Too bothersome if you have to clean a large batch.

I use a fibre glass pen.

Hey, thanks! It looks like an excellent tool! I'll buy one and give it a try.

 

[fredbloggstwo]

The best way I have found of cleaning silver contacts is to use Silver dip (Silvo), providing, that is, that you have the item free to dip.

Dip it for about 20 to 30 seconds using a piece of strings to hold it in the liquid and then rinse in cold water and blow dry.

Its perfect for the pins inside XLRs that you can't get to and it doesn't remove the silver plating, just the tarnishing.

I just used it today on some chassis mounting BNC connectors - they came up a treat.

Regards
Mike

 

[wrenchone]

I think the same stuff in the US of A might be Tarn-X. It uses thiourea as its active ingredient.

 

[fredbloggstwo]

Yes you are right, I just checked the label. Main ingredient is 'acidifier thiourea' Whatever that may be.

Mike

 

[lcsaszar]

My understanding is that silver-oxyde is conductive. And a plug-and-socket connector is self-cleaning.

 

[BillWojo]

That's my understanding also, silver oxide was conductive and not to worry about the tarnish on it.

BillWojo

 

[wrenchone]

This may be true, but you're much more likely to encounter silver sulfide than silver oxide. Reactivities are different.

 

[50AE]

The black patina is silver sulfide - Ag2S.