阿爾法RF800T助焊劑

Alpha Metals RF800T
No-Clean Flux

FEATURES                                                       BENEFITS

•  Medium Solids Content                                            •  Pin Testable
•  Non Corrosive Residues                                           •  High Sir Assemblies

DESCRTPTION

Alpha   RF   800T    is   a   low   solids,   no-clean   flux   formulated   with   a   small   percentage   of   rosin   and   non-halide
activators.   This unique rosin activation system promotes excellent wetting to protected copper and solder coated
surfaces.    Post   soldering   residue   of Alpha   RF   800T   is   minimal,   slightly   glossy  and   can   be   pin   tested   without
removal.

USE

Alpha RF 800T flux is formulated to be applied with foam, wave, spray and mist fluxers.  Flux deposition, density
and uniformity are critical to successful use of low solids no-clean flux.            Applying RF 800T to a dry flux coating
density of 100 to 300 micrograms per square centimetre is recommended.                    Preheating the circuit assembly will
partially   dry   the   flux,   enhance   oxide   removal   and   promote  optimum   wicking,   as   well   as   superior   solder   joint
formation.   Degree of preheat is dependent on many variables; such as conveyor speed, type of components and
substrates.     Entering     the  solder   wave   with  a  top-side   temperature     of  90°C   to  110°C    and   a  bottom-side
temperature of 120°C to 155°C is typical.

The   foam   applicators   should   be   supplied   with   compressed   air,   free   of   oil   and   water.   Maintain   flux   fluid   level
sufficiently above the aerator to produce adequate foam height.              Adjust air pressure to produce optimum height
with   foam   consisting   of   uniform   bubbles. The   addition   of   flux   thinners   will   be   required   to   replace   evaporative
losses   and   maintain   the   balance   in   flux   composition. Due   to   the  low   solids   content   of Alpha   RF   800T  flux,
specific   gravity   is   not   an   accurate   measure   for   assessment. Monitoring   and   controlling   the   acid   number   is
recommended for maintaining the flux composition.            The acid number should be controlled between 21 and 22.