The first point that should be made is that ALL fluxes used in
electronics assembly are organic, from the mildest pure water-white
rosin, via all the "no-clean" varieties to the most active water-soluble
flux. The only inorganic fluxes for soft soldering commonly used for
non-electronics purposes are the zinc chloride/ammonium
chloride/hydrochloric acid mixtures plus a few speciality fluxes for
specific purposes on "difficult" metals.

This makes your question rather vague, especially as you mentioned
"cleaned" without specifying which method you use. If, for example, you
use just water, then any flux that is not water-soluble would obviously
be unsuitable (and, possibly, some that are!).

If the board has been successfully cleaned, then RMA or any other flux
type may be used for repair, as you are not mixing residues. You will
have to decide whether it needs to be cleaned or not. In most cases,
especially with hand soldering, it would be safe not to clean after RMA,
but the results may look unsightly.

Brian

Dehoyos, Ramon wrote:
> All Technetters: What are some of the Organic fluxes mild to low
> activation that are out there and have been proven to work on surface
> mount components in paste and wave solder machine? Also after a board
> has been built using organic flux and cleaned, gone out to customers
> and returned to be repaired, is it safe to use RMA flux? My
> understanding has been that it is not recommended. Thanks in advance.
>  Ramon
>
> --------------------------------------------------- Technet Mail List
> provided as a service by IPC using LISTSERV 1.8e To unsubscribe, send
> a message to [log in to unmask] with following text in the BODY (NOT
> the subject field): SIGNOFF Technet To temporarily halt or (re-start)
> delivery of Technet send e-mail to [log in to unmask]: SET Technet
> NOMAIL or (MAIL) To receive ONE mailing per day of all the posts:
> send e-mail to [log in to unmask]: SET Technet Digest Search the
> archives of previous posts at: http://listserv.ipc.org/archives
> Please visit IPC web site
> http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional
> information, or contact Keach Sasamori at [log in to unmask] or
> 847-615-7100 ext.2815
> -----------------------------------------------------
>

--
______________________________________________
Please note new e-mail address [log in to unmask]

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------