Aluminium and its alloy actor or actress as a result of its fine function, wide already application reachs each sides such as commodity at product of building, spaceflight, electric equipment, electron, its crop and utility already all made the material of the 2nd big metal that is next to iron and steel. As the development of modern science and technology, taller and taller to the requirement of function of aluminium alloy surface, if be able to bear or endure,wearability and corrode sex, adornment sex are waited a moment, technology of aluminium alloy finishing leaves generation in this kind of setting just about and develop ceaselessly [1 3] .
The finishing method of aluminium alloy basically has eletroplate, chemical plating, chemical oxidation, zincous oxidation and small arc oxidation, among them the application of chemical plating nickel is more general. Nickel of plating of aluminium alloy chemistry can improve his to be able to bear or endure corrode sex and wearability, make its have sex of drill rod solder. But, the oxidation film that aluminium alloy forms in atmosphere and metallic film union are bad, want to obtain good film to must be formed what film of oxidation of complete purify surface makes no longer before chemical plating nickel, this is a difficulty of nickel of plating of aluminium alloy chemistry, aluminium alloy also is regarded as accordingly " difficult plating " one of base material. Current, chemical plating nickel still remains to improve in the craft of respect of difficult plating base material [4 9] . This literary grace undertakes pre-treatment to aluminium alloy with special method, through orthogonality the experiment determines condition of craft of nickel of plating of aluminium alloy chemistry. The deposition rate that checks film, adhesion, be able to bear or endure corrode sex and hole rate.
Nickel of 1 chemical plating experiments
1.1 craft condition is optimized
The experiment undertakes in bath of constant temperature water, use vertical mixer to have mix, rotate speed is ～ of ｎ of ｉ of 250 ｒ ｍ ｎ of ｉ of 500 ｒ ｍ , 25 acidity of the HS that use ｐ plan determine accurately value of H of plating fluid ｐ . Test data is a diameter the aluminium alloy great ability of 3 ｍ ｍ .
experiment temperature control is in 85 ℃ of 80 ℃ ～ , the content that reachs complexing agent with nickel salt, reducer next and value of H of plating fluid ｐ are main factor, 4 factors have on foundation of only factor experiment 3 levels orthogonality experiments [10 11] , inspect index to be film deposition rate. Choose craft in order to actor or actress to machine sample next, hand-in-hand travel function checks.

1.2 technological process
Experiment to undertake by following technological process every time:
Special processing fluid is comprised by inorganic acid and oxidant, inorganic acid: 1Oxidant of; of L of 50 ｍ L: 7Room temperature of; of L of 5 ｍ L handles ｎ of 20 ｍ ｉ .
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