A kind of aluminum-zinc-silicon-zirconium hot-dipping alloy and its dipping process
A hot-dip plating, aluminum-zinc-silicon technology, applied in hot-dip plating process, metal material coating process, coating and other directions, can solve the problem that hot-dip aluminum and hot-dip galvanizing coating process cannot meet the service requirements, and achieve fine Small grains and spangles of electroless plating layer, and the effect of reducing leakage plating
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Embodiment 1
[0027] An aluminum-zinc-silicon-zirconium hot-dip alloy, consisting of: A1 54.7 Zn 43.3 Si 1.5 Zr 0.5 .
[0028] The preparation method is as follows:
[0029] (1) Raise the temperature of the furnace to 120°C, add the proportioned A155Zn43.5Si1.5 alloy ingots and aluminum-zirconium alloy ingots into the furnace, raise the furnace temperature to 720°C for two hours, and then cool down to 600°C keep warm for two hours;
[0030] (2) Perform ultrasonic cleaning on the steel plate to remove surface impurities; clean the steel plate with a 15% NaOH solution at 70-80°C to remove surface oil stains, and then wash the steel plate with water for 15 seconds to remove surface residues and lye;
[0031] (3) Then wash the steel plate with HCl solution with a volume concentration of 15% until there is no rust on the surface of the steel plate; wash the steel plate with water to remove surface residues and acid;
[0032] (4) Help the cleaned steel plate with a flux solution at a temper...
Embodiment 2
[0052] An aluminum-zinc-silicon-zirconium hot-dip alloy is composed of A154.5Zn43Si1.5Zr1.
[0053] The preparation method is the same as in Example 1.
[0054] The salt spray test method is the same as in Example 1.
[0055] The specific results of the salt spray test are shown in Table 2.
[0056] Table 2
[0057] Mass before salt spray test / g Mass after salt spray test / g Poor quality / g Mass loss percentage / % blank group 55.5694 55.5483 0.0211 0.03797 1.0%Zr 61.3195 61.3092 0.0103 0.01679
[0058] According to the results of salt spray implementation, when 1.0wt% Zr is added, the corrosion weight loss is effectively reduced, indicating that the corrosion resistance of the coating is better improved under the condition of salt spray, and the intergranular corrosion is weakened, indicating that the crystal grains are finer, that is, the structure of the coating get refined.
[0059] It can also be proved by the results observed under ...
Embodiment 3
[0061] An aluminum-zinc-silicon-zirconium hot-dipping alloy is composed of A154.2Zn42.8Si1.5Zr1.5.
[0062] The preparation method is the same as in Example 1.
[0063] The salt spray test method is the same as in Example 1.
[0064] The specific results of the salt spray test are shown in Table 3.
[0065] table 3
[0066] Mass before salt spray test / g Mass after salt spray test / g Poor quality / g Mass loss percentage / % blank group 55.5694 55.5483 0.0211 0.03797 1.5%Zr 36.8383 36.8307 0.00760 0.02063
[0067] It can be seen from the results of salt spray implementation in Table 1 that when 1.5wt% Zr is added, the corrosion weight loss is effectively reduced, indicating that the corrosion resistance of the coating is better improved under the condition of salt spray, and the intergranular corrosion is weakened, indicating that the grains are more Fine, that is, the coating structure is refined.
[0068] At the same time, the inventor foun...
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