Electronics Forum | Thu Jan 29 09:18:36 EST 2015 | davef
Nichrome, manganin, phosphor bronze etc are easy to solder ... the hard part is removing the corrosion * Manganin: 86% copper, 12% manganese, 2% nickel. Often, it's used in making cryogenic measurements, due to its low heat loss. * Select a flux for
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 | Mon May 15 13:05:31 EDT 2017 | edhare
Pin holes in the gold can allow for corrosion of the underlying nickel and copper to form copper and nickel oxides on the gold surface (example - http://www.semlab.com/blog/?p=564. The corrosion can work itself all the way through the EN layer (exam
Electronics Forum | Wed Jan 31 12:59:53 EST 2018 | fluxgate
Hi Rob, I did check with the board house, and the confirmed that there was no Nickel plating, but that the silver went straight onto the copper in their immersion silver process. Interestingly I've even tested an unplated sample from that board hou
Electronics Forum | Wed Sep 01 05:25:34 EDT 2004 | Martin
Hello, I am looking for some advice please about how to go about plating some brass pins for a new assembly. (which will be hand soldered) I have spoken to a couple of "experts" who seem to contradict themselves.. Firstly what should I be solderin
Electronics Forum | Thu Feb 01 03:02:50 EST 2018 | robl
Hi Rob, > > I did check with the board house, and > the confirmed that there was no Nickel plating, > but that the silver went straight onto the copper > in their immersion silver > process. > > Interestingly I've even tested an > unplated sam
Electronics Forum | Tue Sep 30 21:00:41 EDT 2003 | davef
We're not clear on what you seek. So, as a starting point for our discussion, we wouldn't get agitated if we saw "routine" coplanarity of 4 thou. For instance: Maximum Lead Coplanarity [Altera] Package||Acronym||Lead material||Finish||Maximum Lead
Electronics Forum | Thu Jul 31 15:41:23 EDT 2003 | davef
Q: Could any of you guys tell me what exactly is this greenish thing ? A: No, but is not copper oxide. Copper oxide is brown, the color of a penny [here in the US] or an untreated copper laminated trace on a board. Many copper salts are greenish in
Electronics Forum | Thu Jul 31 11:33:51 EDT 2003 | yngwie
I faced problem over connecter's pin that were hot air soldered. This connector has 168 pins ( similar to the straddle connector ). The process is to apply the flux onto the connector's J-leads, and the hot air pencil were then ran thru' the leads to
Electronics Forum | Tue Dec 10 10:26:56 EST 2002 | davef
Questions are: * What is the current plating on the connector that is over the "plating of the leads is Nickel (99.9% purity)"? * What are the temperatures and durations at those temperatures that you read on these connector leads? * What solder allo
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