Electronics Forum | Wed Sep 01 08:27:38 EDT 2004 | davef
Zinc from the brass [Cu3Zn2] diffuses into the tin causing solderability problems. Just 0.001% of Zn in your solder can render it fit for the scrap heap. So, you need a barrier plate between the brass and the tin. Copper or nickel-plating is commonl
Electronics Forum | Tue Aug 10 09:26:49 EDT 2004 | davef
You should be able to solder to brass - check with you flux supplier to get their recommendations. The flux you are using may not have enough activation to breakdown the oxides on the brass surface. A word of caution - brass (copper and zinc alloy)
Electronics Forum | Mon Feb 27 09:09:36 EST 2006 | davef
Silver on your copper or brass part is a solderability protection. The silver diffuses into the solder and you solder to the base metal, either the copper or brass in your case. Soldering to copper is well known. The issues are soldering to brass
Electronics Forum | Thu Jun 08 07:56:34 EDT 2017 | jkitt84
In an excellent previous thread davef mentions brass should be plated prior to soldering to prevent zinc leaching from the brass. It is reported once the zinc leaches, the joint is weak. He recommends copper or nickel plating. Would silver plating w
Electronics Forum | Mon Mar 29 21:19:38 EDT 2010 | mbclemens60
I have a customer that wants 5000 hrs to red rust. The steel is plated with chloride zinc (barrel plated) and a black chromate. They say a company in Taiwan has the technology, but can not deliver in a production setting. Does anyone know of a cost e
Electronics Forum | Thu Apr 15 11:15:30 EDT 2004 | patrickbruneel
Pure (red) copper oxide is green, its not a residue its just oxidation. In your case water and heat will accelerate the oxidation process of unplated or unprotected pure copper. The best way to avoid this from happening is use a socket with tin or n
Electronics Forum | Fri May 21 12:24:21 EDT 1999 | KA Stillings
I normally handle the soldering issues for this facility but a question was asked of me -- What the H@## is this stuff and what is causing it? Was wondering of I could get some input from any Guru on plating issues. Need info ASAP!!!!!!!!!!!!!!!!!!!
Electronics Forum | Tue Nov 07 11:04:06 EST 2006 | muse95
What type of hardware are you looking for? Nuts and bolts? Custom machined/stamped parts? In general, stainless steel is usually considered RoHS, but more expensive. However, medical equipment usually uses things like stainless steel. However, som
Electronics Forum | Fri May 21 15:20:26 EDT 1999 | JohnW
| I normally handle the soldering issues for this facility but a question was asked of me -- What the H@## is this stuff and what is causing it? Was wondering of I could get some input from any Guru on plating issues. Need info ASAP!!!!!!!!!!!!!!!!!
Electronics Forum | Tue Aug 07 19:32:40 EDT 2007 | davef
Zinc from the brass diffuses into the solder and reacts with tin causing dezincification. Dezincification is a specific type of de-alloying, or selective, leaching corrosion of brass fittings. This type of corrosion selectively removes zinc from th
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