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Alumina oxidation has natural oxidation, electrochemical oxidation, chemical oxidation, alkaline oxidation, acid oxidation, anodic oxidation of six kinds, means that aluminum and aluminum alloy oxidation treatment methods.

There are two main methods for the oxidation treatment of aluminum and aluminum alloy:

Natural oxidation

The oxide film is relatively thin, about 0.5 ~ 4 micron thick, porous, soft, with good adsorption, can be used as the bottom layer of organic coating, but its wear resistance and corrosion resistance are not as good as the anodic oxidation film;

Electrochemical oxidation

The oxide film thickness is about 5 ~ 20 microns, has a high hardness, good heat resistance and insulation, corrosion resistance is higher than the chemical oxide film, porous, has a good adsorption capacity.

Chemical oxidation

Aluminum and aluminum alloy chemical oxidation treatment equipment is simple, easy to operate, high production efficiency, no consumption of electricity, wide range of application, not limited by the size and shape of parts.

The process of chemical oxidation of aluminum and aluminum alloy can be divided into basic oxidation method and acid oxidation method according to their solution

properties.

According to the film properties, it can be divided into oxide film, phosphate film, collate film, chromate-phosphate film.

Aluminum surface treatment oxidation cleaning

Aluminum oxidation pretreatment:

Aluminium surface treatment after oil (degreasing) washing: should

With two washes, aluminum oxide tinting order

Is to wash the product residual liquid (or acid or alkali, if the addition of solvent emulsifier in the oil removal agent, cleaning is more important.)

Or oil.

Prevent it from being carried into the subsequent tank fluid to affect the stability of the tank fluid and prevent the product from being contaminated with oil and producing defective products.

The two

The second wash can not be used for overflow, according to the workload of regular replacement on the line.

Washing after alkali corrosion: at least three times of washing is required. The purpose is to wash away the residual viscous aluminum surface after alkali corrosion

Alkali etch tank liquid film,

Because it's hard to clean,

Suggest minimizing the number of changes to the water in a sink.

I'm going to keep the temperature and the base constant

This is good for cleaning products. If the conditions of the back two sinks, can increase the stirring effect is better.

You can't wash it twice

Make overflow use, change regularly according to workload went.

Aluminium surface treatment after oil (degreasing) washing: should

MIL - A - 8625

With two washes, aluminum oxide tinting order

Is to wash the product residual liquid (or acid or alkali, if the addition of solvent emulsifier in the oil removal agent, cleaning is more important.)

Or oil.

Prevent it from being carried into the subsequent tank fluid to affect the stability of the tank fluid and prevent the product from being contaminated with oil and producing defective products.

The two

The second wash can not be used for overflow, according to the workload of regular replacement on the line.

Chemical (electrolytic) polishing after washing: have two washing is enough, aluminum oxidation coloring purpose to wash off the surface of aluminum

Viscous chemical solution,

It is suggested that * sinks should be provided with a certain temperature to facilitate product cleaning.

A second sink is available

Circulating water cleaning effect is better.

(after electrolysis, film removal process should be added and then washed twice)