Magnesium-lithium alloy molybdate and phosphate conversion solution and method for forming conversion coating
A technology of magnesium-lithium alloy and phosphate, which is applied in the field of alloy surface treatment liquid and alloy surface treatment, can solve the problems of the corrosion resistance of magnesium-lithium alloy, the reduction of corrosion current, and the toxicity of hexavalent chromium, etc. Good recycling value, uniform anti-corrosion ability, good anti-corrosion effect
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[0057] The present invention is described in more detail below in conjunction with accompanying drawing example:
[0058] This embodiment provides a magnesium-lithium alloy molybdate with glacial acetic acid as a pH regulator that is easy to operate, mild in condition, energy-saving, less toxic and low in cost, and can greatly improve the corrosion resistance of magnesium-lithium alloys. - A new method for the preparation of phosphate conversion membranes.
[0059] A) The magnesium-lithium alloy sample was polished, degreased by ultrasonication with acetone, and then pickled with 10g / L oxalic acid at room temperature for 5 minutes;
[0060] B) Wash the sample after A) with warm water, then with running water, and blow dry;
[0061] C) put the sample after B) into 160g / L phosphoric acid, 90g / L ammonium bifluoride solution for activation, the temperature is room temperature, and the time is 2min;
[0062] D) wash the sample after C) activation with running water, and blow dry;...
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