Potassium fluoride,anhydrous
           Potassium fluoride,extra pure
           Potassium fluoride,Granular
           Silicon Dioxide
           Hydrofluoric acid
           Synthetic Cryolite
           Potassium Fluoaluminate
           Ammonium bifluoride
           Potassium Bifluoride
           Aluminium fluoride
           Sodium fluoride
           Potassium Fluorosilicate
           Fluorosilicic Acid
           Sodium silicofluoride
           Potassium Hydroxide Flakes
           Magnesium Fluoride
           Magnesium fluorosilicate
           Barium Fluoride
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The present invention relates to an activating liquid for preheating aluminum alloy material and its preparation and use method. The activating solution is an aqueous solvent containing potassium chloride, lithium chloride, aluminum fluoride and potassium fluoride inorganic salt and has a concentration of 5 to 20 g / l; wherein the molar ratio of the various inorganic salts is KC1: LiCl: AlF3: KF = 3: 1: 2 to 3: 2. The activator was weakly alkaline and had a pH of nearly 7. The steel material before hot infiltration of aluminum is soaked in the activating solution for 10 to 20 seconds, applying slight vibration, and then removing the dry. The activation liquid is water-based solvent, the working temperature is room temperature, through the activation of the activation, can improve the surface activity of steel, and enhance the interface with aluminum alloy bonding strength.