Surface treating method for magnesium alloy
A surface treatment, magnesium alloy technology, applied in chemical instruments and methods, cleaning methods and utensils, cleaning methods using liquids, etc., can solve the problems of difficult process control, easy falling of paint film, difficult operation, etc. The effect of outstanding ability, compact and meticulous film layer, and simple formula
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Embodiment 1
[0026] First prepare the following chemical conversion solution according to the recipe:
[0027] Ammonium dihydrogen phosphate 20 g / L;
[0028] Potassium permanganate 30 g / L;
[0029] Sodium fluoride 1 g / L;
[0030] Sodium acetate 10 g / L;
[0031] Above-mentioned chemical transformation solution also can add following additive:
[0032] Sodium molybdate 3 g / L;
[0033] Sodium nitrate 5 g / L;
[0034] Sodium nitrite 1 g / L;
[0035] Adding any of the above additives to the above chemical conversion solution can make the oxidation-reduction reaction more sufficient and promote the formation of the chemical conversion film, and adjust the pH value of the above-mentioned solution to 5 with phosphoric acid, and then take AZ31 magnesium alloy samples in turn Go through the following steps:
[0036] a. Alkali washing, the AZ31 magnesium alloy sample is immersed in an alkaline solution for a period of time, so that the surface of the AZ31 magnesium alloy sample is degreased and ...
Embodiment 2
[0045] First prepare the following solution according to the recipe:
[0046] Ammonium dihydrogen phosphate 50 g / L;
[0047] Potassium permanganate 10 g / L;
[0048] Sodium fluoride 1 g / L;
[0049] Sodium acetate 10 g / l.
[0050] Above-mentioned chemical transformation solution also can add following additive:
[0051] Sodium molybdate 3 g / L;
[0052] Sodium nitrate 5 g / L;
[0053] Sodium nitrite 1 g / l.
[0054] Adding any of the above additives to the above chemical conversion solution can make the oxidation-reduction reaction more complete and promote the formation of the chemical conversion film, and adjust the pH value of the above-mentioned solution to 5 with phosphoric acid, and then take AZ31 magnesium alloy samples in turn Go through the following steps:
[0055] a. Alkali washing, the AZ31 magnesium alloy sample is immersed in an alkaline solution for a period of time, so that the surface of the AZ31 magnesium alloy sample is degreased and degreased;
[0056] b...
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