HI-GRADE #3549-HF NO CLEAN HALIDE FREE
FLUX
Description
Hi-Grade #3549-HF "No Clean" Flux
is specially formulated low solids resin flux, specifically developed for SMD soldering.
There is little or no residue remaining after soldering.
The Hi-Grade #3549-HF "No Clean"
Flux exhibits excellent fluxing action on surface mounted components without causing
de-metalization of the SMD.
The percent solids available in this series
of fluxes are 5%, 8% and 10%.
Special Features
- Completely Non-Halide
- Passes copper-mirror test as per MIL-F- 14256
- Outstanding solderability on all types of boards, including
ones with SMD’s
- Excellent wetting on surface mounted components
- No visible flux residue remains after soldering - often no
further cleaning is required
- If very high ionic cleanliness required, residue can be
removed by solvent or sponification cleaning
- Conveyor fingers and pallets are noticeably cleaner
Applications
The Hi-Grade #3549-HF "No Clean"
Flux can be used in foam flux operations as well as applying it by dipping, brushing or
spraying. Although there are no uniform working instructions because of the variety of
foam fluxing equipment on the market, the following guidelines will help assure dependable
soldered joints :
- Maintain adequate and constant flux level in the fluxing
unit
- Evaporation losses should be compensated by using Hi-Grade
#16-3552-x Thinner.
- Keep equipment clean and avoid contamination particularly
oil and water.
- Keep the air pressure low and make sure the air lines
contain traps to remove water and oils which may change tile foaming properties of the
flux
Residue
Little or no residue remains after
soldering with Hi-Grade #3549-HF "No Clean” Flux. Often times no cleaning is
required even though the boards are going to be automatically tested. If remaining residue
needs to be removed, it can be easily cleaned by either saponification or solvent
cleaning.
Physical Properties
|
#3549-HF5 |
#3549-HF8 |
#3549-HF10 |
| Appearance |
Amber |
Amber |
Amber |
| Specific Gravity @ 77 deg. F (25 deg. C) |
0.801 |
0.808 |
0.818 |
@ 60 deg. F (15.5 deg. C) |
0.808 |
0.814 |
0.823 |
Pounds per Gallon |
6.66 |
6.72 |
6.80 |
Percent Solids |
5% |
8% |
10% |
Acid Value |
23.5 |
34.0 |
46.0 |
Flash Point |
54 deg. F TCC |
54 deg. F TCC |
54 deg. F TCC |
Surface Insulation
Resistance : Pattern down |
|
5.52 x 10"ohms |
|
- (As per
TR-TSY-000078) :Pattern up |
|
2.74 x 10"ohms |
|
Packing
23 litres or 6 US
gallons per container
209 litres or 55 USs gallons per container
Safety And Precautions
All fluxes with low flash joints should be
handled with utmost care and precaution. They should stored in a dry, well-ventilated area
and flames, sparks and direct heating should be avoided.
