Electronics Forum | Wed Dec 07 12:28:37 EST 2005 | PWH
I have seen problems similar to this caused by too high concentration of cleaning solution used in ultra-sonic cleaning process. If cleaning solution is used, make sure it is compatible with solder process. Also, improper mixing of fluxes and solde
Electronics Forum | Wed Dec 07 00:44:31 EST 2005 | arnold
were having a problem on the units after soldered. after few hours or days the soldered wires has green decay. what does it cause. how can i prevent this.
Electronics Forum | Wed Dec 07 07:20:02 EST 2005 | davef
We need more information about the situation. For instance: * Describe the green residue * Talk about the distribution of the problem, including a single lot or from various lots and over components and component types on the board * Tell us about t
Electronics Forum | Mon Dec 26 23:19:29 EST 2005 | arnold
is there any term called on that corrosion or green contamination?
Electronics Forum | Tue Jan 03 08:23:08 EST 2006 | davef
Look here: http://webexhibits.org/pigments/indiv/overview/verdigris.html
Electronics Forum | Thu Dec 08 18:59:04 EST 2005 | KEN
Is this a wire dip tinning process? If yes, then your flux is probably trapped under the insulator, causing corrosion. BAD BAD BAD (hopefully you don't make wire harnesses for air planes or passenger trains). More info please.
Electronics Forum | Thu Dec 08 08:13:48 EST 2005 | grantp
Hi, Copper oxide is green right? So the green residue after a few days is corrosion of the wire? Regards, Grant
Electronics Forum | Tue Jan 03 07:12:22 EST 2006 | Slaine
on church copper roofs they call the green stuff verdigree (dont know if ive spelt it right)
Electronics Forum | Thu Dec 08 22:25:23 EST 2005 | davef
Grant Copper Oxide [Cu2O]: Color is red to a deep red that can appear almost black. Luster is adamantine or submetallic to dull or earthy if massive. Transparency: Crystals are transparent to translucent. Look here: http://mineral.galleries.com/min
Electronics Forum | Sat Dec 10 14:20:32 EST 2005 | adlsmt
I have seen a similar problem once about 15 yrs ago. Someone decided to try a water wash flux for tinning wires. Bad idea! The wires were dipped in the flux, then in a solder pot. As the lead tin's it forces the flux in the strands to move up the wir
