Diffusion prevention method for inorganic fused salt on magnesium alloy surface
A technology of magnesium alloy and mixed molten salt, applied in the direction of metal material coating process, etc., can solve the problems of deformation and structural change of magnesium and magnesium alloy parts, loss of protective function, and high preparation temperature, so as to reduce production cost and protect performance. The effect of improving and reducing energy consumption
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Embodiment 1
[0025] The material is extruded AZ91D magnesium alloy, and the specific operation steps are:
[0026] 1) Carry out mechanical decontamination (such as sandblasting, sandpaper polishing) on the surface of the magnesium alloy to remove surface pollutants, then degrease with acetone, rinse with alcohol, and then dry in the air;
[0027] 2) Choose anhydrous AlCl 3 Prepare 500g AlCl with anhydrous NaCl in a molar ratio of 2:3 3 -NaCl inorganic mixed molten salt, packed in a dry ceramic crucible;
[0028] 3) Put the pretreated magnesium alloy into a ceramic crucible filled with inorganic mixed molten salt, and ensure that the magnesium alloy does not touch the crucible wall, then quickly bury the sample with the same mixed salt, and cover the crucible lid;
[0029] 4) Put the ceramic crucible with magnesium alloy into the furnace to heat the molten salt to diffuse. The heating temperature is generally controlled at 230°C, and the holding time is 5 hours; , to make the inorganic...
Embodiment 2
[0033] The material is extruded AZ91D magnesium alloy, and the specific operation steps are:
[0034] 1) Carry out mechanical decontamination (such as sandblasting, sandpaper polishing) on the surface of the magnesium alloy to remove surface pollutants, then degrease with acetone, rinse with alcohol, and then dry in the air;
[0035]2) Select anhydrous AlCl3 and anhydrous NaCl in a molar ratio of 4:1 to prepare 500 g of AlCl3-NaCl inorganic mixed molten salt, and put it into a dry ceramic crucible;
[0036] 3) Put the pretreated magnesium alloy into a ceramic crucible filled with inorganic mixed molten salt, and ensure that the magnesium alloy does not touch the crucible wall, then quickly bury the sample with the same mixed salt, and cover the crucible lid;
[0037] 4) Place the ceramic crucible with magnesium alloy into the furnace to heat the molten salt to diffuse. The heating temperature is generally controlled at 320°C, and the holding time is 8 hours; , to make the i...
Embodiment 3
[0041] The material is pure magnesium, and the specific operation steps are:
[0042] 1) Carry out mechanical decontamination (such as sandblasting, sandpaper polishing) on the surface of the magnesium alloy to remove surface pollutants, then degrease with acetone, rinse with alcohol, and then dry in the air;
[0043] 2) Choose anhydrous AlCl 3 Prepare 500g AlCl with anhydrous NaCl in a molar ratio of 1:1 3 -NaCl inorganic mixed molten salt, packed in a dry ceramic crucible;
[0044] 3) Put the pretreated magnesium alloy into a ceramic crucible filled with inorganic mixed molten salt, and ensure that the magnesium alloy does not touch the crucible wall, then quickly bury the sample with the same mixed salt, and cover the crucible lid;
[0045] 4) Place the ceramic crucible with magnesium alloy into the furnace to heat the molten salt to diffuse. The heating temperature is generally controlled at 300°C and the holding time is 6 hours; , to make the inorganic molten salt sy...
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