Electronics Forum | Tue Mar 19 07:48:26 EST 2002 | PeteC
Have QFP at o.5mm pitch with leads too oxidized for the flux in the paste to de-oxidize(in stock for boo koo time). I saw three companies on the Internet that can "tin" (solder coat) the leads. Does anybody have any experience with having this done t
Electronics Forum | Wed Dec 05 17:23:41 EST 2001 | davef
Now there�s a conundrum. You want the �best way to clean leads�, but you want to use the worst type of flux for cleaning leads. You say, �20% copper exposed� � * What happened to the solderability protection during this two-year storage? Wouldn�t
Electronics Forum | Wed Jun 21 08:53:25 EDT 2006 | stepheniii
Are you worried the terminations might b oxidized? Do a dip test. If you have a solder pot carefully dip one termination of the cap into the solder. And see how well it wets. If that test doesn't satify the powers that be, then you can design a more
Electronics Forum | Mon Nov 17 19:15:24 EST 2003 | Victor
I currently have an inventory of trim caps that have oxidation on the leads. I performed a dip test and am averaging 90% wetting on the leads. On product that has these components already installed is there any risk leaving the parts that have oxid
Electronics Forum | Fri Dec 09 22:06:44 EST 2022 | smith88
Are there standards that dictate how long a EEE component can be exposed outside of a nitrogen bag before oxidation occurs? Since Covid I am seeing more and more caps and resistors that seem to have oxidation and do not solder well....
Electronics Forum | Thu Sep 05 22:01:55 EDT 2013 | davef
Questions are: * How did you determine that the coating on your component leads is oxidation? * What is the oxide? BR, davef
Electronics Forum | Wed Nov 08 15:32:45 EST 2000 | CAL
ACI offers solderability restoration services by using Reduced Oxide Soldering Activation (ROSA) technology to remove the oxide layers from circuit boards or components and then re-tin or otherwise coat them to maintain a solderable surface. The R
Electronics Forum | Fri Feb 19 02:11:11 EST 1999 | Pete Sorenson
| During inspection and test we find leads which do not get soldered. Some are because of insufficient paste, but with others everything looks right. This will only happen on 1 to 2 pins, and it is not isolated to a specific type of ic or location o
Electronics Forum | Wed Nov 08 06:52:23 EST 2000 | Cristiano Dick Smiderle
I looking for a possible rework on component terminals that are not soldering in a wave solder machine. The terminals (leads) are very oxidated.
Electronics Forum | Wed Nov 08 20:22:13 EST 2000 | Dave F
You need to remove the oxide before you can properly solder your [or any] component. Call your flux supplier ask them for a more active flux than you are using and for their recommendations on removing the flux residues.
