Kester 83-1004-0985 is a 985M Low Solids No-Clean Flux Pen.
It is halide-free, no clean Flux Pen that is specifically designed for rework of conventional and surface mount circuit board assemblies. 985M was developed for use with both traditional tin-lead and lead-free solder alloys. Kester 985M exhibits improved soldering performance to minimize solder bridges (shorts) during rework operations. This flux is suitable for automotive, computer, telecommunications and other applications where reliability considerations are critical. The surface insulation resistance on soldered boards is higher than that provided by typical organic water-soluble fluxes.
Performance Characteristics:
• Improves soldering performance
• Eliminates the need and expense of cleaning
• Non-corrosive tack-free residues
• Classified as ROL0 per J-STD-004
• Compliant to Bellcore GR-7
Physical Properties
Specific Gravity: 0.805 ± 0.005
Antoine
Paar DMA 35 @ 25°C
Percent Solids (theoretical): 3.60
Acid Number (typical): 20.0 mg KOH/g of
flux
Tested by
potentiometric titration
Reliability Properties
Copper Mirror Corrosion: Low
Tested to
J-STD-004, IPC-TM-650, Method 2.3.32
Corrosion Test: Low
Tested to
J-STD-004, IPC-TM-650, Method 2.6.15
Silver Chromate: Pass
Tested to
J-STD-004, IPC-TM-650, Method 2.3.33
Chloride and Bromides: None Detected
Tested to
J-STD-004, IPC-TM-650, Method 2.3.35
Fluorides by Spot Test: Pass
Tested to
J-STD-004, IPC-TM-650, Method 2.3.35.1
SIR, IPC (typical): Pass
Tested to
J-STD-004, IPC-TM-650, Method 2.6.3.3
Application Notes
Flux Application:
Kester 985M is applied to
circuit boards via Flux Pen® for rework
of printed wire assemblies.
Process Considerations:
Kester 985M should only be
applied to areas that will be fully heated by the soldering iron or other
reflow tool. Care should be taken to
avoid flooding the assembly. The surface tension has been adjusted to help the flux form a thin film on
the board surface allowing rapid solvent evaporation.
Cleaning:
Kester 985M flux residues are
non-conductive, non-corrosive and do not require removal in most applications.
Storage and Shelf Life:
Kester 951 is flammable.
Store away from sources of ignition. Shelf life is 2 years from date of
manufacture when handled properly and
held at 10-25°C (50-77°F).
Health & Safety:
This product, during handling
or use, may be hazardous to health or the environment. Read the Material Safety Data Sheet and warning
label before using this product.
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