Residue-Free, No-Clean Fluxes

Amerway 850-B VOC Free Flux -- Amerway 850-B VOC Free soldering flux is a non-halide, rosin free, no-residue flux specifically developed for foam fluxing in a wave soldering machine of surface mount, mixed technology and through-hole electronic assembly.  Amerway 850-B VOC Free Flux is a water based, non-flammable formulation eliminating special storage requirements and reducing VOC's from plant emissions dramatically.

Benefits:

• VOC free water based formulation.
• Excellent surface wetting.
• No residue formulation eliminates cleaning.
• Increased activity.
• Conforms to Bellcore Specification TR-NWT-000078, Issue 3, Dec. 1991.

Physical Properties:

Specific Gravity                       .102 + 0.01
Pounds/Gallon                        8.50
Acid Value                              20.0 + 2.0
Solids Content                         2.1 + 0.2
Flash Point                               None
Silver Chromate Paper Test      Passed
Copper Mirror Test                  Passed
Freeze / Thaw Test                   Passed

Bellcore Specification TR-NWT 000078
   Surface Insulation Resistance
   Test Pattern: Standard Bellcore Test pattern, 0.025 in. wide 
    lines, 0.050 in spacing
    Environment: 35 C, 90% Relative Humidity
    Bias Voltage: 45-50 volts DC
    Test Voltage: 100 volts DC

Boards                Initial Reading         Final Reading
Control                8.15 X 1012          9.45 X 1012
Pattern-ups          2.25 X 1012           2.05 X 1012
Pattern-down       2.45 X 1012           8.05 X 1012

Electromigration Resistance Test
Test pattern: IPC-B-25 test patterns, 0.0125 in. space and 0.0125 in wide lines.
Environment: 85 C, 85% Relative humidity
Bias Voltage: 10 Volts DC
Test Voltage: 100 Volts DC
Conditioning Potential: 0
Initial Reading: 96 hours conditioning
Final Reading: 500 hours

Boards                  Initial Reading            Final Reading
Control                  4.25 X 1011              4.20 X 1011
Pattern-ups            7.25 X 1011              3.20 X 1012
Pattern-down         5.85 X 1011             9.55 X 1012

Visual Examination: No evidence of any electromigration when viewed at 10 X magnification.

* Modified IPC/ Bellcore Test Method:

         Passes the copper mirror test when the same flux is formulated with isopropyl alcohol as the solids from the water based formulation are reconstituted with isopropyl alcohol.

          Process Recommendations

                      Amerway 850-B VOC Free Soldering Flux is designed for foam fluxing in wave soldering systems.  The optimum preheat temperature for most circuit board assemblies is 200-240 F (93-115 C).  The conveyor speed and preheat should be adjusted to ensure complete water removal before contact with the solder wave.  Because the Amerway 850-B VOC Free Flux is water based, it does not require frequent acid value monitoring.  If thinning is required, the addition of deionized water is all that is necessary.  The Amerway 850-B VOC Free Flux may freeze when exposed to temperature below 32 F.  If the flux becomes frozen, bring to room temperature until thawed and agitate.  The material is not affected by freezing.

Safety:  Amerway 850-B VOC Free Soldering Flux is a non-flammable material.  Standard precautions should be observed when handling this product.