New-style aluminium and aluminium alloy eletroplate pre-treatment technology

Aluminium and aluminium alloy electroanalysis in electrolyte can make film, but film connection power is not durable, easy come off. Consequently, can be in aluminium first reentry of film of the accumulation in containing a lot ofzincic oxidation to add up to the aqueous solution of content eletroplates all right, this one method is zincic substitution method or accumulation law already. Also but power source of oxidation of positive pole of preexistence aluminium and course of processing of aluminium alloy appearance gets a very thin poriferous oxidation film, undertaking eletroplating. 　　
Traditional aluminium reachs the technical flow that aluminium alloy eletroplates
Aluminium and aluminium alloy eletroplate technical flow has plating pre-treatment, eletroplate, plating aftertreatment 3 some composition. Plating pre-treatment is to matter to eletroplate the working procedure of commodity quality stand or fall, its are main the grease that the purpose is eliminate aluminium and aluminium alloy appearance, natural form oxidation film and other contamination. 　
Of the convention normally technical flow is: Defatted - bath - decrease corrode - bath - pickling - bath - activation - bath - dip zinc - bath - retreat zinc - bath - 2 dip zinc - bath - neuter plating nickel - bath - sequel eletroplates. 　　
Because of aluminium and approve of of pre-treatment of aluminium alloy tradition widespread presence above is lacked, consequently, be necessary to undertake improvement to its. 　　
Improve general-purpose aluminium and aluminium alloy eletroplate pre-treatment technology
Defatted alkaline corrode 2 syncretic - bath - pickling - bath - go grey - bath - alkalescent activation - dip zinc - bath - neuter plating nickel - bath - sequel eletroplates. 　
New technology carries out defect to what aluminium alloy eletroplates now, oneself of connection aluminium alloy teachs special physico-chemical function, undertake improvement on the foundation of former technology, be as follows in detail good qualities:
1. technology circuit is short, the other metal of the surface layer outside passing alternative deliquescent aluminium alloy will progress the purity of aluminium alloy appearance, it is progress of film connection force.
2. replaces acidity activation technology to keep clear of thoroughly with alkalescent activation the silicon that leads alloy to express remain in China and foreign countries of plating pre-treatment process and silica gel, useful progress film contacts force.
3. After alkalescent activation need not bath and direct dip zinc, bath of the classics after can preventing acidity activation is 2 when dip zinc again in air show and form oxidation layer. 4. Need brief dip zinc only can, film connection force is showing excel 2 times dip zinc and complex multivariate technology of zinc of dip having cyanogen. 　
5. Technical versatility is wide, apply the aluminium alloy at all brands to eletroplate almost pre-treatment. 　
6. Commodity eletroplates one-time percent of pass is showing skill of prep above tradition. If the connection force stand or fall of pure film is evaluated, criterion the percent of pass of commodity gets close to 100%
7. The technical operation in carrying out production is brief, convenience. 　
8. Long-term production of practice of automatic product line confirms large-scale dragon door, the new-style aluminium alloy after improving eletroplates pre-treatment is very smooth and steady. 　
9. Advantage eletroplates in traditional aluminium alloy undertake the technology is improved on technical base. 　　
10. Apply grand to become aluminous oxidation power source, can reach rate of the film on speed pace, shorten on velar hour, managing capital, attain the result of managing capital.

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