Flux Properties Technical Considerations

• Be capable of dissolving the oxides of the base metals on which it is used.
• Retain low viscosity to permit its ready displacement from capillary gaps by brazing material.
• Melt at lower temperature than the melting point of brazing material to be used with it.
• Mix readily with water to form a smooth paste free from coarse crystals.
• Retain its paste form for a reasonable time and be capable of being remixed if it dries out.
• Wet the work to which it is applied as an aqueous paste.
• Cover the work adequately while in the stage heating.
• Remain on vertical surface when fused.
• Have a reasonably sufficient life without tiring when brazing operation are prolonged.
• Have a residues which are easy to remove.