NC280 Low-Residue Liquid Rework Flux

NC280 Low-Residue Liquid Rework Flux Description:

NC280 is a low-to-medium solids, no-clean liquid flux formulated to leave minimal post-process residues that are pin testable without cleaning.  NC280 offers an excellent activity level with good performance on bare copper, solder coated and organic coated PWBs, leaving negligible post-process residues that are non-conductive and do not require post-process cleaning.  NC280 is safe to be left on the circuit board and passes SIR in the raw state.  NC280 is extremely safe for rework, palletized wave soldering and point-to-point selective soldering.  NC280 has a unique chemistry and a wide process window, making it a drop-in for most no-clean and RMA wave soldering operations, including lead-free wave soldering.

NC280 Rework Flux Features:

• Passes SIR in Raw State
• Low-Residue
• Extremely Safe for Rework
• Halide-Free
• Wide Process Window
• Can Be Foamed, Sprayed, Misted, or Dipped
• Excellent Wetting
• Lead-Free Compatible

Application:

• NC280 is formulated for application via spray, foam, brush, mist, or dip. For spraying, NC280 is ready to use directly from its container, no thinning required. When spray fluxing, it is imperative that proper flux coverage and uniformity be achieved and maintained. A dry flux coating of 500-1500 micrograms per square inch is recommended as a starting point.
• When foaming, air stones should be supplied with compressed air, free of oil and moisture. Adjust foam head to achieve uniform bubble size for optimum coverage. During foaming applications, it is periodically necessary to add AIM’s Common Flux Thinner to replace that which is lost due through evaporation.
• Monitoring and controlling the acid number is recommended for maintaining the flux composition. The acid number should be maintained to approximately 12.82 MG KOH/GRAM.

Physical Properties:

Process Control:

Because of the low percentage of solids in this flux, control of specific gravity with automated equipment usually is found to be ineffective; therefore, control via titration is necessary. AIM’s Titration Kit has proven to be cost-effective, user friendly, quick and accurate. Titration should be carried out at least once an hour for flux foaming operations, or more often if large variances are found. Specific gravity should be carefully maintained at .79 ± .01.

Cleaning:

NC280 can be cleaned, if necessary, with saponified water or an appropriate solvent cleaner. Please refer to the AIM No-Clean-Cleaner Matrix for a list of suitable cleaning materials.

Handling:

• NC280 has an unopened shelf life of 1 year when stored at room temperature.
• Do not store near fire or flame. Keep away from sunlight as it may degrade product.
• NC280 is shipped ready-to-use, no mixing necessary.
• Do not mix used and unused chemical in the same container.
• Reseal any opened containers.