The Paton Welding Journal, 2011, №12



2011 №12 (04)

2011 №12 (06)

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The Paton Welding Journal, 2011, #12, 20-24 pages  

HYGROSCOPICITY OF HIGH-BASICITY SYNTHETIC FLUX

S.I. MORAVETSKY

E.O. Paton Electric Welding Institute, NASU, Kiev, Ukraine
 
 
Abstract
It was experimentally found that hygroscopicity of synthetic acid fluxes is at the same that of standard fused fluxes. Hygroscopicity of the synthetic fluxes grows not less than 10 times with increase in their basicity from 0.8 to 2.4. This probably is caused by the presence of a free lime which forms in the synthetic flux as a result of the solid-phase reaction between magnesium oxide and calcium fluoride in flux sintering. The thermodynamic calculation results and experimental data confirm the above assumption.
 
 
Keywords: welding flux, oxide-fluoride system, basicity, hygroscopicity, phase composition, solid-phase chemical reaction
 
 
Received:                ??.??.??
Published:               28.12.11
 
 
References
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