Metal recovery increase: typical target +1\u20135 percentage points versus untreated melts (depends on alloy and furnace practice).<\/p>\n<\/li>\n
Hydrogen reduction: many flux treatments reduce dissolved hydrogen by 20\u201360% when paired with degassing.<\/p>\n<\/li>\n
Dross consolidation time and skim quality: faster formation of a viscous, pumpable slag that can be skimmed cleanly without excessive metal entrainment.<\/p>\n<\/li>\n<\/ul>\n Flux products<\/a> are engineered mixtures of inorganic salts chosen to interact with aluminium oxides, surface films, and alloying elements at melt temperature. Common families and roles:<\/p>\n Chloride salts<\/strong> (e.g., NaCl, KCl): help lower eutectic points; promote wetting of oxide and dross surfaces, enabling agglomeration.<\/p>\n<\/li>\n Fluoride salts<\/strong> (e.g., KAlF\u2084, Na\u2083AlF\u2086 variants): highly active at breaking oxide films and dissolving certain surface compounds; used sparingly when corrosion control is critical.<\/p>\n<\/li>\n Carbonates and borates<\/strong>: sometimes included to tune viscosity and surface tension.<\/p>\n<\/li>\n Magnesium scavengers \/ modifiers<\/strong>: added when alloys contain Mg; formulations avoid excessive Mg-removal unless intended.<\/p>\n<\/li>\n Hydrophobic additives \/ binders<\/strong>: in granular or tablet products to reduce hygroscopic behavior and control dissolve rate.<\/p>\n<\/li>\n<\/ul>\n How these components act in molten aluminium:<\/p>\n A low-melting eutectic molten film forms on the metal surface that adsorbs fine oxides and holds them within a viscous layer. This layer consolidates into a skim-able slag with time and slight agitation.<\/p>\n<\/li>\n Fluoride-rich salts can chemically react with oxide films to lower surface energy, permitting faster coalescence of inclusions.<\/p>\n<\/li>\n Chloride components improve the flux\u2019s ability to flow across the melt surface, helping capture scattered particulates.<\/p>\n<\/li>\n<\/ul>\n Because some components (notably simple chlorides) increase vapor or fume formation at high temperature, modern formulations aim to balance reactivity with low emissivity and minimized furnace lining attack. Supplier technical literature and peer-reviewed metallurgy studies document these tradeoffs; plant trials quantify the net benefit.<\/p>\n Flux is manufactured and supplied in multiple physical formats. Each format has operational tradeoffs that affect dosing accuracy, dust control, storage life, and integration with automated systems.<\/p>\n![\"Aluminium](\"https:\/\/www.c-adtech.com\/wp-content\/uploads\/2026\/03\/2565_nJKBeHX4.webp\")
2. Typical chemistry and mechanisms<\/h2>\n
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![\"Oxide](\"https:\/\/www.c-adtech.com\/wp-content\/uploads\/2025\/12\/6163_RVfb4RkN.webp\")
3. Physical forms and practical handling<\/h2>\n
Table 1 \u2014 Typical product forms and pros\/cons<\/h3>\n