Water-soluble flux paste FVR-40P [20ml]

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Designed for soft soldering copper water pipe. And also for soldering radio components, copper wire, nickel-plated LF, HF and microwave connectors, copper alloys (except brass and zinc) ,  allows tinning iron and steel . It is especially worth noting the extremely high efficiency of FVR-40P when soldering nickel-plated low-frequency and high-frequency connectors, which cannot be tinned with rosin. FVR-40P allows you to solder the RF connector quickly preventing the dielectric from melting. A distinctive feature of the flux is that it tins oxidized and darkened copper very well without causing further corrosion. This property allows copper to be soldered without first stripping the darkened layer. The special composition and soft consistency of the flux provides easy washable with water and polar organic solvents (ethyl alcohol, isopropanol, acetone).

The main difference from standard fluxes is the absence of inorganic acids and their salts (chlorides and hydrochlorides), amines and amino alcohols, acid anhydrides, ammonium salts. Since the flux does not contain compounds strongly dissociating in water, it does not corrode metals.

The flux does not contain toxic compounds and its vapors are not hazardous to health. A special additive neutralizes vapors of active components of the flux that arise during soldering. Thus, FVR-40P fumes do not have toxic properties, unlike many other active fluxes containing halogens and harmful organic matter. The ability to dissolve metal oxide layers is due to the ionization of active components only in the molten state; at ordinary temperatures, the flux has no noticeable activity.

It should be understood that any water-soluble substances in the presence of moisture have a final electrical conductivity determined by the degree of dissociation, therefore it is very important, after the soldering of electronic devices, to completely wash off the flux residues with water or distillate demineralized by reverse osmosis. From products in which no currents flow, it is enough to wash off the flux with tap water.

The need to develop water-soluble fluxes is dictated by the desire of electronics manufacturers to abandon the flushing of printed circuit boards with organic solvents. Avoiding the use of expensive, volatile and flammable and toxic organic solvents in production is the choice of most modern radio enterprises.