Aluminum alloy door and window surface oxidation, treatment method?

There are few very practical solutions!

You said that the surface of the aluminum alloy doors and windows of the balcony is oxidized, and some are discolored, I don't know how long your doors and windows have been installed, it stands to reason that if the aluminum alloy profiles produced in full accordance with the national standard, even the most ordinary door and window oxide material will not fade very seriously! Unless you have a chemical plant with strong acids and alkalis near your home.

It is almost hopeless to restore the original color, because the oxidation treatment of the profile must be achieved in the solution of the liquid in the oxidation pool, and your doors and windows have been processed and used for so long, so there is no hope of recovery!

I personally suggest that if you have to maintain a unified style with home decoration, you can find a car paint processing plant to give your door and window profiles indoor side to do a spraying treatment, although the adhesion and weather resistance of car paint is not as good as powder coating profiles, but it should not be a big problem within three or five or seven years!

It's really not good, you can replace the new door and window profiles, the current aluminum profile is not very expensive, and there are energy-saving and heat-insulating bridge profiles, and the processed doors and windows are both energy-saving and environmentally friendly!

If you find that the aluminum alloy doors and windows have oxidized rust, you can use a fiber brush with water to brush off the rust.

It should be noted that steel grit, sandpaper, steel wool balls, etc. should not be used for grinding. After the rust on the surface of aluminum alloy doors and windows is removed, the exposed aluminum elements will oxidize with the oxygen in the air to produce a new protective film. The use of sandpaper, steel wool balls, etc. will destroy the original alumina protective film, resulting in a new oxidation reaction of aluminum alloy, which will make the frame of aluminum alloy doors and windows thinner and thinner, and ultimately affect the service life of aluminum alloy doors and windows.

Aluminum alloy doors and windows refer to the doors and windows made of aluminum alloy extrusion profiles for frames, mullions and fans, which are called aluminum alloy doors and windows, referred to as aluminum doors and windows. Aluminum alloy doors and windows include doors and windows that are made of aluminum alloy as the base material of stressed rods (rods that bear and transmit self-weight and load) and wood and plastic, referred to as aluminum-wood composite doors and windows, and aluminum-plastic composite doors and windows.

Aluminum alloys must be oxidized to prevent further corrosion, as long as they don't cost it, it's fine.

Wipe with alkaline to try.

If there is mildew on the surface of die-cast aluminum, please do another cleaning and anti-oxidation treatment at the first time.

In this way, the workpiece can also be renewed. If left unattended and left unchecked, mildew will grow wildly, corroding the workpiece and causing losses.

Instead of washing it thoroughly, it was simply rinsed with water, then blown dry, or even dried naturally. Then it was stacked in the warehouse for a few months, and suddenly one day it was necessary to leave the warehouse, only to find that the workpiece was mildew, moldy, black, and yellow.

First, the customer wants the goods urgently, and the goods cannot be delivered, and the money and reputation are lost;

Second, if it really wants to be scrapped, the loss will be great. They had to look for mildew spot remover for aluminum die castings everywhere, hoping to soak it and take it out to look brand new.

Ways to prevent mold in die-casting aluminum:

1. Clean it in a timely and thorough manner, including the oil stain on the surface of the workpiece and the slight oxidation mildew spot (at this time, the mildew spot is still very small, and if you don't look carefully, you can't really see it with the naked eye).

Of course, the general degreasers on the market, such as kerosene, Tianna water, thinner, trichloroethylene, dichloromethane, and degreasing powder, cannot clean the die-casting aluminum mold, and have no effect on aluminum die-casting mold, blackening, yellowing, and mildew. The most effective way to do this is to use a professional detergent to thoroughly remove oil and mildew in one go.

2. After cleaning, immediately do an anti-oxidation treatment. It should be noted that chromic acid has been banned at present, and it is necessary to use Piaojie chromium-free cyanide-free passivator to meet environmental protection requirements;

3. The workpiece after anti-oxidation drying needs to be placed in a dry and ventilated place and checked regularly.

1. Do not use scouring and deterioration slag remover containing Na salt or Mg salt, you can use C2Cl6, Na2SiF6 and NaF composition scouring deterioration, or N2 gas scouring.

2. Instead of a release agent containing plant fibers, it can be replaced with a better quality release agent.

3. Without the processing cutting fluid of the machine containing plant fiber, it can be replaced with oil-based anti-rust cutting fluid.

4. The product cannot be stored in the open air for a long time to prevent dust from accumulating on the surface of the product.

5. The product packaging carton should be wrapped with stretch film on 6 sides, and it should be waterproof.

6. After the product is stained with water, it should be placed in a ventilated place to dry.

The most important anti-mould measure is to put MBOON anti-mold tablets in the box or box where the aluminum castings are stored. The anti-mold sheet will oxidize and release the anti-mildew factor, and it will be evenly distributed to a limited space without anti-mildew dead corners (it is recommended to use it in a closed space). MBOON STICKERS have a two-stage antimicrobial effect, which is more effective and longer-lasting.

The anti-mold sheet is made of environmentally friendly paper and will not cause environmental pollution. When used correctly, it is harmless to the human body, and you can use this anti-mold tablet with confidence. In addition, we can also achieve the effect of antibacterial sterilization by regularly spraying MEIBOSS anti-mold and antibacterial spray in the warehouse.

Avoid mildew of products caused by the environment of the warehouse.

Hello, the so-called mildew point is the corrosion of aluminum castings, and the rust of steel products is the same thing, it seems that it is caused by tapping or ultrasonic cleaning, you have to analyze which link is caused, if it is caused by tapping, you can use oily cutting fluid instead, in order to increase rust resistance; If it is caused by ultrasonic cleaning, it is necessary to pay attention to the anti-corrosion performance of the cleaning agent, which can be solved by the technicians who produce the cleaning machine, because there should be a special method for anti-corrosion in the cleaning of aluminum parts.

The surface of the aluminum alloy is moldy. It is a phenomenon of oxidation. The surface can be treated with a polishing wheel. In fact, this kind of thing is also unavoidable.

If the aluminum alloy is moldy, you can rinse it with water, or you can wipe it with wet wipes and some water, and it is best to blow dry.

1. Degreasing treatment:Before the aluminum profile is treated, the aluminum profile product should be degreased, the purpose is to remove the protective oil layer on the surface of the aluminum profile and ensure the uniformity of the surface during the post-treatment.

2. Acid etching treatment:After degreasing, the aluminum profile must be acid-etched to remove the oxide on the surface of the aluminum profile.

3. Alkali etching treatment:After acid etching, alkali etching is carried out, the purpose of which is also to remove oxides on the surface of the aluminum profile and indentations left during the extrusion process.

4. Mixed acid treatment:After acid etching and alkali etching, a layer of mixed elements will remain on the surface of the aluminum profile, which must be removed by mixing acid to reveal the essential color of the aluminum profile.

Precautions for aluminum oxidation treatment.

The non-conforming workpiece is fixed to the fixture and anodized with aluminum, and then anodized for 2 to 3 minutes according to the method of anodizing aluminium in an aqueous solution of sulfuric acid. After the film has softened and peeled, it is slightly washed with rye and ammonia nitrogen. After the water comes out, it can be conductive anodized again.

Aluminium-cesium oxide technology requires that the workpiece be washed with an organic solvent (characteristic: clear, colorless liquid) before it is transferred to a heat treatment or welding process to remove the surface oil, which is common. The surface of the workpiece is formed because it is impossible.

A coking oil-based sintered layer (the process of transforming a powdered material into a dense object) that is difficult to remove with organic solvents and can cause localized corrosion when immersed in rye.

In the actual process, there are many anodizing of aluminum alloys, which can be applied in daily life, so that the characteristics of this process can produce a hard protective layer on the surface of aluminum parts, which can be used to produce daily necessities such as kitchenware. However, the anodizing effect of cast aluminum is not good, and the surface is not good, and it can only be black. Aluminum alloy profiles are a little better.

In the past ten years, China's aluminum oxide coloring technology has developed rapidly, and many factories have adopted new process technology, and have accumulated rich experience in actual production. There are many mature and developing anodizing methods for aluminum and its alloys, which can be selected according to the actual production needs.

Before choosing the oxidation process, you should have an understanding of the aluminum or aluminum alloy material, because the quality of the material and the different components will directly affect the quality of aluminum products after anodizing. On this point, Comrades Hong Jiude and Fan Ji have made a special discussion (see "Electroplating and Finishing", No. 2, 1982). For example, if there are bubbles, scratches, peeling, roughness and other defects on the surface of aluminum, all defects will still be revealed after anodizing.

The composition of the alloy also has a direct impact on the surface appearance after anodizing. For example, aluminum alloy containing 1 2% manganese is brownish-blue after oxidation, and with the increase of manganese content in aluminum, the surface color after oxidation is transformed from brownish-blue to dark brown. Aluminum alloy containing silicon is gray after oxidation, and white gray when containing 3 6% silicon.

The zinc-containing ones are milky-colored, the chromium-containing ones have a golden to gray uneven hue, and the nickel-containing ones are pale yellow. Generally speaking, only aluminum and gold with magnesium and titanium content greater than 5% can be oxidized to obtain a colorless and transparent, bright and smooth appearance.

After choosing aluminum and aluminum alloy materials, it is natural to consider the selection of a suitable anodizing process. At present, the sulfuric acid oxidation method, oxalic acid oxidation method and chromic acid oxidation method, which are widely used in China, have been introduced in detail in manuals and books, and there is no need to repeat them.

Use a shot blasting machine to blast the surface, or use a sandblasting machine to treat the surface to remove the drawing pattern and increase the surface roughness.

The surface treatment of aluminum alloy doors and windows mainly includes anodizing, electrophoretic coating and powder spraying. [Click to view more brand news].

Product features of Alpha Series Heavy Duty Sliding Door:

1. Equipped with 5+27A+5 hollow tempered glass (with gray premium logo aluminum strip);

2. Standard configuration: American CMEC hand lock + lifting pulley;

3. The second track and the third track can be selected, and the gold steel gauze can be configured to effectively prevent mosquitoes; Equipped with flat rail and waterproof lower rail, it can be matched with different application scenarios.

Anodizing is to coat the surface of aluminum alloy with an oxide film; Electrophoretic coating is mainly through the dissolution of electrophoretic coating in water, so as to form a uniform film layer on the surface of aluminum alloy materials; Powder coating uses high-voltage static electricity to adsorb a layer of dust particles on the surface of aluminum alloy. These treatments can make the service life of aluminum alloy longer.

If you want to know more about doors and windows, it is recommended to consult Zunshang doors and windows. Zunshang doors and windows have won the authoritative certification of the top ten brands of China Doors and Windows Network, have the strength of integrating imported hardware allocation resources, and have won a number of domestic energy-saving, patent and other high gold content certificates. The company has won many honors such as "Top Ten Brands of Doors and Windows", "Most Trusted Products by Consumers", "Influential Enterprise of Guangdong Door Industry Association", "Innovative Brand of Pan Home Furnishing Industry", "2021 Kapok China Design Award" and so on.

As the vice president unit of Guangdong Door Industry Association, Zunshang Doors & Windows has established a sound quality management system, environmental management system and occupational health and safety management system according to international standards, and has passed the ISO 9001:2015 quality management system certification.

1.The surface treatment of aluminum alloy doors and windows is now more common: anodizing, electrophoresis, powder coating, fluorocarbon spraying, etc.

2.Fluorocarbon spraying is a kind of electrostatic spraying, which is also a liquid spraying method, which is called fluorocarbon spraying, and is called curium oil in Hong Kong. It belongs to high-grade spraying, so it is higher and has long been applied abroad.

Fluorocarbon spraying has excellent resistance to fading, frosting, air pollution (acid rain, etc.), corrosion resistance, strong UV resistance, crack resistance and the ability to withstand harsh weather environments. It is beyond the reach of general paints.

3.Generally speaking, the weather resistance of these surface treatments is gradually increased according to the previous arrangement, but it cannot be generalized and should be analyzed specifically, because there are many influencing factors such as the thickness of the coating, the coating material, and the process.

4.In addition, it depends on whether the project is located coastal or inland, the degree of corrosion of the surrounding environment and other factors to determine the type and thickness of the coating you choose.

1. When cleaning aluminum alloy doors and windows, do not step on the aluminum frame, and do not pull the frame for support. In this way, it is easy to wear out doors and windows, and even accidents.

2. Aluminum alloy doors and windows can be scrubbed with a soft cloth dipped in water, do not use laundry detergent or strong acid and alkali detergent, which will corrode the surface of the profile.

3. For the glass glue or sealing wool strip on the aluminum alloy doors and windows, it should be repaired and replaced in time when it falls off.

4. After the rain, wipe the wet glass and door and window frames in time.

5. Usually check the connection parts of aluminum alloy doors and windows, tighten the bolts in time if they are loose, and replace the damaged parts.

6. The use of aluminum alloy doors and windows should be light, and if there is a problem, do not pull and push hard, and eliminate the fault first. Keep the door frame clean, especially the sliding groove.