®
715 / 8 17
Inorganic Acid Fluxes
General
Information
Kester Inorganic Acid Fluxes are solutions of inorganic salts for use as general all-
purpose fluxes. These fluxes are active formulations for soldering difficult-to-solder
metals.
The Inorganic Acid Fluxes were developed for non-electronic soldering applications and
provide maximum wetting, leaving residues which can be removed with water. The
corrosive nature of the residues precludes their use for electrical or electronic
applications. Flux residues should be carefully removed to prevent corrosion caused by
residual chloride salts. All formulations can be used for soldering with an iron, torch,
oven induction coils or resistance tools.
Selection
of Type
There are three types of Kester Inorganic Acid Fluxes with the selection based on the
type of metal being soldered, flux activity, type of salt and type of solvent system.
Kester 715 -
This flux is the standard all-purpose flux for general soldering, with high
activity, stability and heat resistance. Rapid soldering can be accomplished on most
metals with this concentrated flux.
Kester 817 -
Although this is a mild flux, it is a very active solution developed for
soldering nickel-chrome and stainless steel alloys where regular acid fluxes such as 715
are not active enough to remove the resistant oxide coatings.
Flux
Removal
All inorganic fluxes have the potential to form water insoluble, chloride complex residues
such as lead chloride. Kester 5760 Neutralizer will solubilize these residues for
complete removal with water.
Complete removal of residues left when soldering with 715 and 817 can be assured by
rinsing with a 1% solution of hydrochloric acid. This should be followed by a rinse with a
2-10% solution of 5760 Neutralizer and a final rinse with clean water.
Physical
Properties
Flux
Formula
715
817
1
2
Specific
Gravity @ 75°F (24°C)
1.510 ± 0.010
1.430 ± 0.010
Flash Point1
None
None
Solids
Contents %2
51.4
43.3
Flash point as received with specific solvent evaporation.
Solids percentage indicates possible residue and not activity.
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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The data recommendations presented are based on tests, which we consider reliable. Because Kester has no control over the conditions of use, we disclaim any responsibility connected with the
use of any of our products or the information presented. We advise that all chemical products be used only by or under the direction of technically qualified personnel who are aware of the
potential hazards involved and the necessity for reasonable care in their handling. The technical information contained herein is consistent with the properties of this material but should not be
used in the preparation of specifications as it is intended for reference only. For assistance in preparing specifications, please contact your local Kester office for details.
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