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| Why does aluminium product processing aluminium alloy need sandblasting oxidation tre |
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Posted by: aluhm - 02-25-2018, 06:16 AM - Forum: aluminium faq
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Why does aluminium product processing aluminium alloy need sandblasting oxidation treatment? Why does aluminum alloy need surface oxidation treatment? The surface oxidation of aluminum and aluminum alloy is the most important surface treatment process. The aluminum alloy surface oxidation problem handling q&a based on the current shenzhen aluminum processing plant production needs, combined with the pearl river delta region of aluminium alloy sandblasting oxidation process for decades of production experience, in the form of q&a, blank piece of aluminum oxide before receiving and inspection, oxidation, mechanical finishing, chemical polishing and erosion of electrochemical polishing, oxidation protection before, workpiece clamping, anodic oxidation, anodic oxidation film dyeing and coloring, chemical conversion, and the anode oxidation membrane technology such as closed.
Aluminium and aluminium alloy in the atmosphere can naturally formed a layer of oxide film, but the thin membrane (40-50 a) and porous, for amorphous, inhomogeneous and discontinuous film layer, not as a decorative reliable protective film layer. With the continuous development of aluminum products processing industry, more and more widely in the industry with the method of anodic oxidation and chemical oxidation, in aluminium and aluminium alloy surface generates a layer of oxide film, to achieve the purpose of protection a decoration. The oxide film obtained by chemical oxidation was generally 0.3 ~ 4um, and the properties of soft, abrasion and corrosion were lower than that of anodic oxide film. Therefore, it is seldom used alone except for special purpose. However, it has better adsorption capacity, and it can be applied to improve the corrosion resistance and decoration of aluminum products. The oxide film obtained by anodic oxidation process is generally 5-20v m, and the thickness of hard anodic oxide film can reach 60-2500m. The film layer also has the similar characteristics:
(I) high hardness of aluminum processing. The hardness of pure aluminum oxide film is higher than that of aluminum oxide film. In general, its hardness is related to the aluminum alloy composition and electrolyte process conditions. The anodic oxide film is not only of high hardness but also good wear resistance. In particular, the porous oxide film has the ability to absorb lubricant, and can further improve the abrasion resistance of the surface.
(2) high corrosion resistance of aluminum processing. This is due to the high chemical stability of the anodic oxidation film. The anodic oxidation film of pure aluminum is better than that of aluminum alloy. This is due to the fact that the composition of the alloy or the formation of a metal compound cannot be oxidized or dissolved, which makes the oxide film discontinuous or void, thus greatly reducing the corrosion resistance of the oxide film. Therefore, it is necessary to seal the film after anodic oxidation to improve its corrosion resistance.
(3) aluminum processing has strong adsorption capacity. Anodic oxidation of aluminium and aluminium alloy membrane is porous structure, has a strong adsorption capacity, so give hole filling all kinds of pigments, such as lubricants, resin can be further improve protection, insulation, wear resistance of aluminum products and decorative performance.
(4) aluminum processing has good insulation performance. The anodic oxide film of aluminum and aluminum alloy has no conductive properties of metal and becomes a good insulating material.
(5) strong thermal insulation resistance. This is because the coefficient of thermal conductivity of anodic oxide film is much lower than the pure aluminium anodic oxide film can heat resistance around 15001 c, but pure aluminium can only 660 ℃. In summary, aluminum and aluminum alloys are chemically oxidized, especially after anodic oxidation, and the oxide film formed on its surface has good protective properties. Therefore, it is widely used in aviation, electrical, electronic, mechanical manufacturing and light industry.
Ornamental oxidation
There are many kinds of aluminum and aluminum alloy decorative oxidation process, which can be divided into two categories: chemical oxidation and electrochemical oxidation. Among them, anodic oxidation treatment is widely used. This is because the oxidation film obtained by anodic oxidation is better than that obtained by all chemical oxidation methods.
After chemical or electrochemical polishing of aluminum and aluminum alloy parts, after anodic oxidation treatment, can get bright and clean, high brightness, transparency of oxide film layer, then through dyeing, thunder-and-lightning colour can be obtained by surface. If it is oxidized under a certain technological condition, it can form an imitation glaze layer on its surface, thus obtaining special decorative effect on the surface of aluminum products.
According to incomplete statistics, the decorative oxidation process of aluminum and aluminum alloy in our country has developed to dozens of kinds, making the development of China's aluminum processing industry change with each passing day.
1. Chemical oxidation.
Aluminium and aluminium alloy chemical oxidation treatment, according to the nature of the solution, can be divided into two categories, alkaline and acidic solution oxidation treatment, according to its membrane layer can be divided into the properties of oxide film, chromate, phosphate coatings film and chromic acid ~ phosphate film, etc.
(I) process specification.
1. Specification for chemical oxidation of lye.
Anhydrous sodium carbonate (Na2C03) 50g/L.
Sodium chromate (Na2Cr04) 15g/L.
Sodium hydroxide (NaOH) 25g/L.
Temperature of 80-100 'c
Time 10-20 min
After oxidizing, the parts should be cleaned immediately, and in the 20g/L chromic acid solution and at room temperature for 5 ~ 15 seconds, then clean and dry. The color is golden. The film thickness is 0.5 ~ 1um, suitable for pure aluminum, aluminum magnesium, aluminum manganese alloy.
2. A specification for the oxidation process of phosphate monochromate.
Formula 1: phosphate (H3P04) 50--60mL/L.
Chromic anhydride (Cr03) 20- 25g/L.
Ammonium fluoride (NHOHF2) 3 ~ 3.5g/L.
Boric acid (H3B03) 1 ~ 1.2g/L.
The temperature of 30-36 'C
3 ~ 6 minutes
This method USES phosphoric acid more, so also called phosphating method. The oxide film is colorless to light blue, and the film thickness is about 3-49m. The film layer is dense, the corrosion resistance is high, and the size of the part is unchanged after oxidation, which is suitable for all kinds of aluminum and its alloy. In order to further improve the corrosion resistance, it can also be filled in. Recruit parts by the oxidation after cleaning in the 40-45 g/L of potassium dichromate solution, the temperature is 90-98 ℃, soak for 10 minutes, and then after cleaning in the < = 70 ℃ oven dry can. Suitable for general parts. Can also be in 20 to 30 g/L of boric acid in the solution, the temperature is 90-98 ℃, dipping 10-15 minutes, and then by the cleaning within 70 ℃ oven drying. Suitable for aluminum rivet, etc.
Formula 2: phosphoric acid (H3P04) 45g/L.
Chromic acid drunk (Cr03) 6g/L.
Sodium fluoride (NaF) 3g/L.
Temperature 15 ~ 35 ℃
10-15 min time
Thin film, good toughness, high corrosion resistance, suitable for aluminum and aluminum alloy parts after oxidation.
Formula 3: phosphoric acid (H3P04) 22g/L.
Chromic acid drunk (Or03) 2.--4g/L.
Sodium fluoride (NaF) 5g/L.
Qing acid (H3BOO 2 g/L
At room temperature
15-60 s
This method is also known as chemical conductive oxidation. Oxide film colorless transparent; The film is thin, with a magic of 0.3-0.5 um and good conductivity. It is mainly used for flexible aluminum parts.
3. Formula 1: chromic anhydride (Cr03) 4N 6g/L.
Sodium fluoride (na-f) lg/L.
Potassium ferricyanide [K3Fe (CN) 6] 0.5g/L.
Temperature of 30-35 0 c
20-60 s
The color of oxide film is iridescent, thin film, good conductive performance, mainly used for aluminum electric parts which have certain requirements for conductive performance.
Formula 2: chromic acid drunk (Cr03) 3.5 ~ 6g/L.
Sodium dichromate (NaZCrZO7) 3 ~ 3. 5 g/L
Sodium fluoride (NaF) 0.8g/L.
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| how does aluminum alloy processing stress eliminate credit |
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Posted by: aluhm - 02-25-2018, 06:08 AM - Forum: aluminium faq
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Aluminum alloy is the most widely used in industry of non-ferrous metal structural materials, aluminum alloy density is low, but the intensity is high, close to or more than high-quality steel, plastic, can be processed into various profiles, with excellent electrical conductivity, thermal conductivity and corrosion resistance, in aviation, aerospace, automotive, machinery manufacturing, shipping and widely used in chemical industry.
Aluminum alloy in the process especially machining process prone to large deformation and stress lead to size out-of-tolerance scrap, some no deformation at the time the poor tend to produce deformation cause greater system after installed. The existing methods of stress, such as thermal aging stress, vibration aging stress, mechanical drawing, model correction and deep cold composite stress, etc.
Heat ageing to stress generally for small parts, is a traditional method to stress, because a lot of aluminum alloy material is very sensitive to temperature, so limits the aging temperature can't is too high, otherwise will reduce the strength of the material. So usually thermal aging in temperature is not higher than 200 ℃, so the stress effect is only about 10-35%.
Vibration aging to stress is the use of a controlled vibration energy by holding the vibrator on the surface of the products processed on the processed products, at a specific frequency vibration under processing, so as to achieve the aim of release, to reduce the residual stress in workpiece. This kind of processing method is common in large structural parts, welding and casting parts to stress treatment, the removal effect is about 50-60%.
Mechanical stretching method is the principle of eliminating stress after quenching of aluminum alloy plate, add a certain amount of permanent tensile plastic deformation along the rolling direction, make the tensile stress with the original plastic deformation occurred after quenching residual stress superposition, to ease and release residual stress. The results show that the mechanical drawing method can eliminate more than 90% residual stress. However, this method is only suitable for simple parts with simple shape, and it has a high requirement for the homogeneity of the aluminum alloy sheet before stretching, and is mainly used in aluminum processing factories.
Loading module and the correction method of cold pressing is in a special finishing the mould, through strict control of set limit to cold plastic to eliminate the residual stress of aluminium alloy forging complex shape, the method is to adjust, not eliminate the overall stress level of the parts, it makes some parts of the residual stress on aluminum alloy products was released at the same time, has the potential to other parts of the residual stress increased. In addition, due to the large residual stress of the workpiece, the deformation of the mould can cause the cold to harden, crack and fracture. While too little deformation causes the stress relieving effect, and the cost of production of plastic mold is high, the difficulty of the orthopedic operation is bigger also, so the limitations of such a method is in practice application.
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| The application of ultra high strength aluminum alloy in aerospace |
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Posted by: aluhm - 02-25-2018, 06:04 AM - Forum: Knowledge & Technique
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Material is the basis of the aircraft structure, aluminum alloy due to its high specific strength, forming and processing performance is good, good corrosion resistance, will serve as a very important aircraft structure materials, the use of a large proportion in large aircraft structures.
Foreign large passenger aircraft from Boeing 707 to now to Boeing 787 and represented a new generation of a large airliner A380, the assessment of comfort, safety, economy and other major commercial performance index, great changes have taken place, the design method is also from the static strength design, damage to the safety design, to the current damage tolerance design, the use of materials from the one-sided pursuit of high strength, the requirement to the fatigue strength of a good material to, besides considering damage tolerance, at the same time, considering the new requirements to the corrosion resistance and low cost, therefore also great changes have taken place in the main structure material, especially with the substantial increase in the amount of advanced composite materials, the traditional great impact the amount of light alloy, such as B787 aircraft composite dosage of 50%, compared to 20% of the amount of aluminum alloy.
Aluminium alloys also play a leading role in the use of civilian aircraft such as the A380 superjumbo.The Boeing 777 is a large commercial passenger jet that Boeing launched in the 1990s, using materials that were more mature in the late 1980s and early 1990s, or commoditized materials in the 1990s.Therefore, its selection has certain representativeness.
It can be seen from the analysis of the models of the manufacturing enterprises of major international commercial airliners that the high-strength aluminum alloy as the structural material of the aircraft still occupies a very important position.In combination with the overall situation of China's development of large-scale civil aircraft, it can be seen that the ultra high strength aluminum alloy has a broad market application prospect in the aviation field.
The application of composite materials in the space structure is expanded, and the application of aluminum alloy in the strategic missile with solid rocket engine is obviously reduced.But in quite a long time in the future, ultra high strength aluminum alloy is still the rocket, the main structure of the space shuttle and the space station and other spacecraft materials, is also one of the important structural materials of missile weapon systems such as.At present, the domestic, outer spaceships, spaceflight and structural components are mainly aluminum alloy.
Application of ultra-high strength aluminum alloy in construction industry.
With green materials in the building materials (reducing material consumption, recycling) requirements of the increase and the increase of doors and Windows in the building industry area, especially in the construction of sports venues, exhibition hall, light the demand of ultra high strength aluminum alloy profile will be huge.
Ultra high strength aluminum alloy, can be used in the construction requirements of lightweight high strength, high plastic profiles, such as sports stadiums, exhibition halls, temporary housing, such as the structure of the material, also can be applied to a certain bearing requirements of aluminium alloy building doors and Windows and glass curtain wall, balcony guardrail, billboards, bridge traffic facilities.
Because of the high strength properties of ultra-high strength aluminum alloy, the overall weight of the building will be greatly reduced, the building structure will be simplified, and the construction materials will be reduced.Due to the high plastic properties of the materials, the structure of the building will be further diversified.Due to the good corrosion resistance of the materials, the maintenance cost of the building will be reduced.At the same time, due to the easy recovery of aluminum alloy materials, the construction waste will be reduced and the environment will be beautified, which will greatly reduce the energy consumption of the construction industry and achieve the goal of energy conservation and emission reduction.
The application of ultra high strength aluminum alloy in other industries.
Ultra high strength aluminum alloy with high strength, high hardness, low density and excellent corrosion resistance, make its in promoting energy conservation and emissions reduction, lower energy consumption per unit GDP and increase economic efficiency has the important position cannot be ignored.It can not only be used in automobile, aviation, aerospace, construction and other fields, but also can be used in bicycle, textile industry, mould and
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| Common problems and solutions of aluminum sheet wire drawing |
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Posted by: aluhm - 02-25-2018, 05:58 AM - Forum: Knowledge & Technique
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Nowadays, more and more metal shells of aluminum products are made of metal wire drawing technology, which can play a beautiful and anti-corrosive role. Make products both fashionable and technological. In aluminum wire drawing process, the anode processing special skin membrane technology, can make the aluminum plate surface generating a contains the skin of the composition of the metal film layer, each tiny silk mark is visible, so radiant with fine hair gloss metallic matte.
Common problems and solutions of aluminum sheet wire drawing.
1. Uneven drawing:
Product of many factors, the problem is one of the most common feeding aluminum plate width size, positioning when drawing wire drawing operation in the roller wear is inconsistent, cause drawing different specifications of the plate edge location drawing texture depth uneven density. (solution: in the treatment of each batch of aluminum sheet on the roller before batch production after maintenance, as well as the backup of a set of the roller, the production process of each production, 100-120, zhang replaced the roller location at a time, to avoid the roller edge wear.)
2. There is a difference between the pattern and the pattern:
The biggest factor is that the wire drawing equipment is not well controlled, which leads to a shallow grain. Moreover, after oxidation corrosion, the clarity of brushed aluminum plate decreases again.
3. Surface sand of aluminum plate:
Production line in the bath concentration is low, the temperature is too high dusting, two reasons cause this is human factors, is the production personnel did not monitoring in place to bath liquid bath concentration and temperature deviates from the standard process.
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| What is the formula of aluminum sulfite |
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Posted by: aluhm - 02-25-2018, 03:30 AM - Forum: aluminium faq
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Aluminum sulfite is a base. It's conjugate acid, sulfurous acid, is a weak acid. This makes it a relatively strong base. Note that conjugates are always opposites this way: if a base is weak, it's conjugate acid is strong, and vice versa. It is only when a base us extremely weak (and is therefore the conjugate of a very strong acid) that we say that it is not a base and is only a salt. While the strongest bases have hydroxide groups, there are a lot of bases that do not contain hydroxide. Examples include: NH3 -- Ammonia NaCH3CO2 -- Sodium acetate KNO2 -- Potassium nitite
1 AlS
2 AlSO3
3 Al2(SO4)3
4 Al2(SO3)3
5 Al2S3
The formula is [Math Processing Error]Al2(SO3)3, determined by testing for [Math Processing Error]Al3+ and [Math Processing Error]SO33− ions.
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| Good methods to choose non-slip aluminum plate |
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Posted by: aluhm - 02-24-2018, 07:55 AM - Forum: Knowledge & Technique
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There are many non-slip aluminum plate products and manufacturers in the markets. So many customers don’t know how to choose the proper products for them. So in this article, I am going to tell you the good methods to chose non-slip aluminum plate that suits you.
Firstly, look at the material. High-quality aluminum alloy anti-skid plate used in aluminum, thickness, strength and oxide film should meet the relevant national standards. Wall thickness should be more than 1.2 mm, tensile strength of 157 Newton per square meter, yield strength to reach 108 Newton per square millimeter, the oxide film thickness should reach 10 microns.
![[Image: aluminum%20tread%20plate%201.jpg]](http://aluminium-sheet.com/images/portfolio/aluminum%20tread%20plate%201.jpg)
Secondly, see processing. high-quality aluminum alloy anti-slip plate has fine processing, good anti-skid function, good looks, good corrosion resistance and oxidation resistance.
Finally, look at the price, in general, high-quality aluminum alloy anti-skid plate due to high production costs, the price is inferior to the low-grade aluminum alloy anti-skid plate to about 30% higher. At present, the processing of aluminum alloy anti-skid board self-employed more, they do not understand the structural characteristics of aluminum alloy anti-skid and its performance. In order to reduce the cost of cutting corners, product safety risks larger, generally should not be used. The best choice of regular aluminum alloy anti-skid plate manufacturers of products.
haomei Aluminum is a professional aluminum checker plate manufacturers in China, its aluminum checker plate products include 1060 aluminum checker plate, 1100 aluminum checker plate, 3003 aluminum checker plate, 3105 aluminum checker plate, 5052 aluminum checker plate, 5083 aluminum checker plate, 5754 aluminum checker plate, 6061 aluminum checker plate, 6063 aluminum checker plate, 6082 aluminum checker plate, diamond aluminum tread plate, three bars aluminum tread plate, five bars aluminum tread plate etc. All the products have high quality and reasonable price.
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| Various advantages of aluminum plate |
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Posted by: haomeialu - 02-24-2018, 07:48 AM - Forum: Knowledge & Technique
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Is aluminum plate equivalent to floor? No, it's not the same as the floor. Home flooring is usually smooth as a mirror, but its corrosion resistance, anti-skid performance and hardness are less than aluminum plate. In our lives, we can see that we are surrounded by aluminum plate. The appearance of the city's skyscrapers is aluminum. In our home, the refrigerator, microwave oven, the appearance of the sound are aluminum, and your furniture, cabinets are also aluminum.
![[Image: 5052-aluminum-plate.jpg]](http://thick-aluminum-plate.com/images/pic/5052-aluminum-plate.jpg)
1, aluminum can be recycled, environmentally friendly. Aluminum can be 100% recovery, different from glass, stone, ceramics, aluminum-plastic panels and other decorative materials, high salvage value.
2, aluminum light weight, good steel, high strength. 3.0mm thick aluminum plate per square weight 8kg, tensile strength 100-280n / mm2.
3, good craftsmanship. Using the first processing after the painting process, aluminum can be processed into a flat, curved and spherical and other complex geometric shapes.
4, uniform coating, color and diverse. Advanced electrostatic spraying technology makes the paint and aluminum attached between the uniform, color and diverse, large selection of space.
5, good weather resistance and corrosion resistance.
6, installation and construction convenient and quick. Aluminum in the factory molding, the construction site without cutting, fixed on the skeleton.
7, aluminum is not easy to tarnish, easy to clean and maintenance.
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| The chemical composition and characteristics of 6063 aluminum plate |
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Posted by: haomeialu - 02-24-2018, 06:52 AM - Forum: Knowledge & Technique
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6063 aluminum plate itself contains a lot of other metal elements, mainly the following:
Si: 0.20 to 0.60; Cu: 0.10; Mg: 0.45 to 0.9; Zn: 0.10; Mn: 0.10; Ti: 0.10; Cr: 0.10; Fe: 0.35.
![[Image: packing1.jpg]](http://thick-aluminum-plate.com/images/pic/packing1.jpg)
The main features of 6063 aluminum plate:
1, 6063 aluminum plate heat treatment to strengthen, and high impact toughness.
2, there is excellent thermoplastic, high-speed extrusion into a complex structure of thin-walled. And 6063 aluminum plate quenching temperature range, quenching sensitivity is low.
3, welding performance and corrosion resistance is excellent, and Al-Mg-Si alloy is the only one does not find the phenomenon of stress corrosion cracking alloy, so the use of very wide, but the price is slightly higher.
4, 6063 aluminum processing surface is very smooth, very easy to anodize and coloring.
haomei Aluminum is a famous aluminum plate manufacturer in China. We provides high-quality products and perfect after-sale service. we have customers all over the world and have received good reputation. Choosing haomei means choosing excellence.
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| The features of aluminum tread plate of haomei Aluminum |
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Posted by: haomeialu - 02-24-2018, 06:49 AM - Forum: Knowledge & Technique
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With the continuous development of aluminum industry, aluminum products are favored by people, and aluminum tread plate is also more and more popular. Today, haomei Aluminum introduces the characteristics of aluminum tread plate for you.
Aluminum tread plate can be recycled, and is environmentally friendly. Aluminum can be 100% recovery, different from glass, stone, ceramics, aluminum-plastic panels and other decorative materials, high salvage value.
Pattern aluminum plate light weight, good steel, high strength. 3.0mm thick aluminum plate per square weight 8kg, tensile strength 100-280nmm2.
![[Image: aluminum-tread-plate.jpg]](http://thick-aluminum-plate.com/images/pic/aluminum-tread-plate.jpg)
Good craftsmanship. Using the first processing after the painting process, aluminum can be processed into a flat, curved and spherical and other complex geometric shapes. Uniform coating, color and diverse. Advanced electrostatic spraying technology makes the paint and aluminum attached between the uniform, color and diverse, large selection of space.
Good weather resistance and corrosion resistance. Up to 25 years without legs color.
Aluminum tread plate is not easy to stain, and easy to clean and maintenance. Fluorine coating film of non-sticky, so that the surface is difficult to attach contaminants, more good to clean.
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| The role of washing for aluminum checker plate |
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Posted by: haomeialu - 02-24-2018, 06:33 AM - Forum: Knowledge & Technique
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Aluminum checker plate is a goods of high expectation. In the use process, washing can play a very good role of maintenance and extending life. Different washing methods have different roles. Let us briefly understand the role and importance of washing on aluminum checker plate.
![[Image: aluminumdiamondplate.jpg]](http://thick-aluminum-plate.com/images/aluminumdiamondplate.jpg)
Aluminum checker plate washing effect:
1, chemical polishing washed, in order to wash off the appearance of the appearance of the aluminum plate chemicals, the best selection of the use of active water, to avoid the appearance of sticky preparations without scouring clean.
2, after the oil wash, remove the appearance of the aluminum plate oil, try to cut the impact of oil on the appearance of goods.
3, and after the washing, on the side of the tank containing some of the preparations, the demand for some corroded formulations on the impact of pattern aluminum function.
On the appearance of the pattern of aluminum scouring, the different scouring method does not affect the role of the same, but if the erosion of unclean will bring serious corrosion of goods, so a reduction on the erosion can not be ignored.
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