Aluminum alloy surface treatment method
A technology of aluminum alloy surface and treatment method, which is applied in the direction of metal material coating process, liquid chemical plating, superimposed layer plating, etc., can solve the problem of unimproved wear resistance, poor ability to adapt to the environment, conversion film layer Insufficient uniformity and other problems, to achieve the effect of high brittleness, good corrosion performance, and easy brazing
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Embodiment 1
[0016] A method for surface treatment of an aluminum alloy, comprising the steps of:
[0017] 1) Take 300g / L sodium hydroxide, 150g / L zinc oxide, 20g / L potassium sodium tartrate, 30g / L potassium pyrophosphate and prepare galvanizing solution in distilled water;
[0018] 2) Take 50g / L nickel sulfate, 20-25g / L sodium hypophosphite, and 80g / L sodium citrate to prepare nickel salt solution in distilled water;
[0019] 3) Wipe the aluminum alloy surface with absorbent cotton wetted with ethyl acetate solvent to remove surface oil;
[0020] 4) Etch the degreased aluminum alloy in nitric acid solution for 9 seconds to remove the oxide film on the aluminum alloy surface, then wash with water and dry;
[0021] 5) Dip the etched aluminum alloy into the galvanizing solution, keep it at room temperature for 2 minutes, wash it with water, then dip it in 35% concentrated sulfuric acid solution for 2 minutes, then wash it with water and dry it;
[0022] 6) Immerse the galvanized aluminum a...
Embodiment 2
[0025] A method for surface treatment of an aluminum alloy, comprising the steps of:
[0026] 1) Take 300g / L sodium hydroxide, 150g / L zinc oxide, 25g / L potassium sodium tartrate, 30g / L potassium pyrophosphate and prepare galvanizing solution in distilled water;
[0027] 2) Take 50g / L nickel sulfate, 20-25g / L sodium hypophosphite, and 80g / L sodium citrate to prepare nickel salt solution in distilled water;
[0028] 3) Wipe the aluminum alloy surface with absorbent cotton wetted with ethyl acetate solvent to remove surface oil;
[0029] 4) Etch the degreased aluminum alloy in nitric acid solution for 9 seconds to remove the oxide film on the aluminum alloy surface, then wash with water and dry;
[0030] 5) Dip the etched aluminum alloy into the galvanizing solution, keep it at room temperature for 2 minutes, wash it with water, then dip it in 35% concentrated sulfuric acid solution for 2 minutes, then wash it with water and dry it;
[0031] 6) Immerse the galvanized aluminum a...
Embodiment 3
[0034] A method for surface treatment of an aluminum alloy, comprising the steps of:
[0035] 1) Take 300g / L sodium hydroxide, 150g / L zinc oxide, 23g / L potassium sodium tartrate, 30g / L potassium pyrophosphate and prepare galvanizing solution in distilled water;
[0036] 2) Take 50g / L nickel sulfate, 20-25g / L sodium hypophosphite, and 80g / L sodium citrate to prepare nickel salt solution in distilled water;
[0037] 3) Wipe the aluminum alloy surface with absorbent cotton wetted with ethyl acetate solvent to remove surface oil;
[0038] 4) Etch the degreased aluminum alloy in nitric acid solution for 9 seconds to remove the oxide film on the aluminum alloy surface, then wash with water and dry;
[0039] 5) Dip the etched aluminum alloy into the galvanizing solution, keep it at room temperature for 2 minutes, wash it with water, then dip it in 35% concentrated sulfuric acid solution for 2 minutes, then wash it with water and dry it;
[0040] 6) Immerse the galvanized aluminum a...
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