2222-CL Soldering Flux, Contains Halogen, Water-Soluble, 1 Gallon
Kester 2222-CL is a high-activity, organic acid flux designed for automated wave solder applications where a more aggressive flux is required to solder difficult assemblies. The flux will provide maximum capillary wetting action through plated through-holes, making it ideal for use on multilayer boards. Along with this enhanced activity, 2222-CL flux produces bright, shiny solder joints, and the residue after soldering is effectively removed in standard water cleaning systems. Polyglycols, which can be detrimental to board surface insulation resistance, are not present in the flux formula. This flux is also suitable for some dip tinning applications where a high activity flux is required.
Performance Characteristics:
- High activity
- Minimizes icicling and bridging
- Chemically compatible with most solder masks and board laminates
- Ideal for multilayer boards
- Classified as ORH1 per J-STD-004
RoHS Compliance
This product meets the requirements of the Restriction of Hazardous Substances (RoHS) Directive, 2015/863 for the stated banned substances.
Application
2222-CL can be applied to circuit boards by a spray, dip, foam, or wave process. An air knife after the flux tank is recommended to remove excess flux from the circuit board and prevent dripping on the pre-heater surface.
Flux Control
Specific gravity is normally the most reliable method to control the flux concentration. A hydrometer should be used to check concentration. Control of the flux in the foam flux tank during use is necessary for assurance of consistent flux distribution on the circuit boards. The complex nature of the solvent system for the flux makes it imperative that Kester 4662 Thinner be used to replace evaporative losses. When excessive debris from circuit boards, such as board fibers and from the airline buildup in the flux tank, these particulates will redeposit on the circuit boards, which may create a buildup of residues on probe test pins. It is, therefore, necessary to clean the tank and then replenish it with fresh flux when excessive debris accumulates in the flux tank.
Cleaning
No neutralizer, saponifiers, or detergents are necessary in the water wash system for the complete removal of flux residues. It is not recommended to use highly mineralized tap water. Otherwise, tap, deionized, or softened water may be used for cleaning. The optimum water temperature is 54 to 66 °C (130 to 150 °F), although lower temperatures may be sufficient.