The technology that alloy positive pole oxidizes

The commonly used technology that 1. positive pole oxidizes
The commonly used technology that aluminium alloy positive pole oxidizes has: Technology of technology of technology of vitriolic and zincous combustion, chromic acerbity zincous combustion, combustion of oxalic acid positive pole and technology of combustion of phosphoric acid positive pole. The most commonly used is vitriolic and zincous oxidation.
2. vitriolic positive pole oxidizes
The zincous combustion technology that uses extensively domestic and internationally now is vitriolic and zincous oxidation namely, compare him to have very large dominant position on characteristic of film of manufacturing capital, oxidation and function with other measure, its capital the brightly lit sex of low, film is good, anti-corrosive be able to bear or endure conflict sex good, chromatically is brief wait for an advantage. It is with rare vitriolic make electrolyte, undertake zincous oxidation to commodity, velar ply can amount to 5um, 20um, adsorptive sex of film is good, colorless brightly lit, the technology is brief, the operation is convenience.
3. chromium acerbity positive pole oxidizes
The film that chromic acerbity zincous oxidation gets is thinner, as long as 2 - 5um, can hold to the precision with original work and outside surface roughness; Hole leads low difficult coloring, do not do sealing of hole to also can be applied; Velar layer is soft, wearability is poorer but flexibility is good; Anti-corrosive force is more powerful, chromium is small to aluminous solubility, make fluid of the remain inside pinhole and aperture right of the component corrode lesser, comfortable wait for structural member at cast, this technology is used morer on the military affairs. Can undertake probation to component quality together, in crackle place Brown electrolyte can be poured out of, apparent.
Positive pole of 4. oxalic acid oxidizes
Oxalic acid is small to aluminous oxidation film dissolvability, rate of oxidation film small opening is so low, velar layer wearability and insulating property are better than vitriolic film; But capital of oxalic acid oxidation is tall it is vitriolic 3~5 times; An oxalic acid is met in cathode and positive pole by echo, cause electrolyte stability to differ; The colour and lustre of film of oxalic acid oxidation follows technical condition change easily, cause commodity to produce off color, so this technology is applied suffer sure tie. But oxalic acid can do vitriolic oxidation additive to apply more see.
Positive pole of 5. phosphoric acid oxidizes
Oxidation film is deliquescent in phosphoric acid electrolyte than vitriolic big, oxidation film is consequently thin (want 3um only) , an aperture is big. Because phosphoric acid film has stronger water proofing property, but obstruct glue sticky agent it is good that because of hydration ageing makes the adhesion of adhesive bonding agent is compared, so principal use at pressworking the pretreatment of the outside processing of plate and aluminous workpiece adhesive bonding.

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