Hello Mark,

Please take a look at the IPC-A-610E chapter 10.6.4

Met vriendelijke groet, Kind regards, Mit freundlichen Grüβen,

Ramon Essers
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-----Oorspronkelijk bericht-----
Van: TechNet [mailto:[log in to unmask]] Namens Woolley, Mark D. (Mark)
Verzonden: maandag 23 april 2012 15:42
Aan: [log in to unmask]
Onderwerp: [TN] No-Clean Flux

I have an issue with one of the assembly houses we use.  They are using a No-clean flux that contains adipit and succinic acids (per the MSDS) in an alcohol base.

Is it allowed to leave flux on the PWB that HAS NOT BEEN DEACTIVATED BY HIGH TEMPERATURES OF SOLDERING?

I am not talking about the flux used in the solder paste or wave soldered flus.  I am talking about the flux used at rework and touch-up of the PWB.

 

I havce seen papers detailing corrosion on PWBs using "no-clean" fluxes and I have seen it on some of our products.  This usually pccurs near the periphery of the PWB where the wave solder flux is protected by the pallet used to pass the PWB through the solder wave.

 

Any opinions and references will be appreciated.  I can give the manufacturer and flux type to individuals, but don't want to put it in a global email.

 

Thanks

mark

 

 

mark

Mark Woolley |PTRL Laboratory | Avaya | 1300 West 120th Ave | Westminster, CO 80234  USA |

Voice (Lab): (303) 538-2166 | email: [log in to unmask] |

 


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