150N Aqua Flux
Download the TDS and MSDS for this product.
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| INTRODUCTION |
| 150N Aqua Flux is a pH neutral liquid flux formulated for producing defect free assemblies in wave soldering processes employing water cleaning. It provides excellent ionic cleanliness after water cleaning. 150N contains no free acid but possesses a high activity level. 150N Aqua Flux is also suitable for surface mount
assembly soldering operations. |
| APPLICATION |
TEST RESULTS |
| 150N Aqua Flux is a low smoking, neutral pH foam flux.
Using moderate airflow rates, its fine-bubble foam head
is fast breaking and recovers rapidly for effective
coverage at high production speeds. This active flux will
produce bright shiny solder connections. The residues
wash off easily to very low levels of ionic contamination.
Water washing can be done without the use of rinse aids.
Cleaning can be delayed because the flux has no free
acids. The flux is formulated so that the cleaning process
water effluent is completely biodegradable. Local
regulations may require pretreatment to raise the pH to
remove dissolved lead from water effluent. |
| J-STD-004 (IPC Tm-650) Test |
Result |
| Flux Type (per J-STD-004) |
ORM1 |
| Copper Mirror |
Moderate |
| Halide Test |
Not Available |
| Silver Chromate |
Fail |
| Fluoride Test |
Zero |
| SIR |
Pass after clean |
| Electromigration |
Pass after clean |
| Physical Properties |
Values |
| Solids Content |
23.0%-24.0% |
| Specific Gravity @ 20oC |
0.84-0.88 |
| Acid Number (mg KOH/gm) |
7.5-9.0 |
| Color |
Clear to Light Amber |
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| ATTRIBUTES |
- Excellent cosmetics and easy rinsing
- Superior activity offering good solderability on
all surface finishes
- Good topside wetting
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|
FLUX CONTROL |
SPRAY SYSTEMS |
The specific gravity of the flux should be maintained
between 0.85 and 0.87.
The amount of flux to be applied during foaming
applications should be between 800 and 1300
micrograms per square inch of solids. The amount of flux
to be applied during spray application should be between
475 and 850 micrograms per square inch of solids. |
Ideally an air knife should be fitted even when using a
spray system in order to prevent insufficient capillary
action when soldering. Spray system air knives should
normally be angled slightly towards the system.
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|
FOAMING SYSTEMS |
CONVEYOR SPEED |
| The air knife hole diameter should be between 1 and 1.5
mm and the distance from the fluxer to the air knife
should be approximately 4 to 6 inches. The air knife
should be angled between 5 to 12 degrees away from the
foam wave so that excess flux can be removed without
destroying the foam head. |
The ideal conveyor speed is dependent on the type of
board and preheat requirements, but a speed between
3.5-6.5 feet will suit most applications.
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|
ANALYSIS (Buret) |
THINNING |
| Step |
Result |
| Titration |
Pipet 5 ml of WS150N into titration flask |
| Add 40-50 ml of D.I. water or IPA |
| Add 2-3 drops of Phenolphthalein indicator
solution and mix well |
| Titrate the mixture with 0.1 N base from
clear to a pink endpoint |
| Record the volume of NaOH used |
| Calculations |
Calculation for acid content of WS150N:
Acid number (mg NaOH/g flux) = (mils of 0.1N base) X 1.38 |
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The consistency of 150N Aqua Flux should be
maintained by the addition of thinner to compensate for
evaporation losses. It is recommended that the specific
gravity @77°F be maintained between 0.850 and 0.865
by addition of thinner. Only Flux Thinner FT-100 should
be used for this purpose to ensure consistency of flux
foaming and soldering characteristics. |
|
PREHEAT |
SOLDER TEMPERATURE |
| A topside temperature between 80-110°C is
recommended. A bottom side temperature should be
35°C higher than the topside. |
A solder temperature between 230-250°C should be
maintained.
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|
AVAILABILITY |
SAFETY AND HANDLING |
| WS150N Water Soluble Liquid Flux is
readily available in 5 gallon pails and 55 gallon drums. |
Keep away from heat, sparks and open flames. Use in
well-ventilated area and observe standard precautions for
handling and use. Refer to the Material Safety Data
Sheet for further information.
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