Sorry! Alkaline water-soluble flux????????????????????

Brian

Richard Kraszewski wrote:

> Good idea. This will additionally confirm if the cure of the mask is an
> issue. I have some experience with the alkaline ingredients of an OAWSF
> attacking uncured mask. If this is the case, the alkaline wash
> recommended below may also attack the mask. Even if not,  the flux may
> still be an issue because if you combine the alkalinity of the flux
> ingredient with the preheat temperatures seen, you could have the
> required synergy to attack borderline acceptable mask.
>
> Rich Kraszewski
> Advanced Manufacturing Engineer - KEDS
> Phone:  260.925.8919
>
>
>
>
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Rudy Sedlak
> Sent: Thursday, April 22, 2004 2:32 PM
> To: [log in to unmask]
> Subject: Re: [TN] White Discoloration -- Tin?
>
>
> I come in on this discussion late, so I am not aware of previous parts,
> but has anyone yet suggested the possibility that the white haze is Tin
> Oxide from the solder dross?
>
> IF this were the case, a wash with a strongly alkaline cleaner might
> make it go away...
>
> Rudy Sedlak
> RD Chemical Company
>
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