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THE DIFFERENCE BETWEEN ALUMINUM AND ALUMINUM ALLOY, AND THE APPLICATION AFTER ANODIC OXIDATION
1. Aluminum, Aluminum alloy
In people's mind.aluminum is a kind of material which is easy to get rotten or broken. It's because the most aluminum wares give impression to people. Housewares are made of pure aluminum which has a large plastic deformation and worse hardness, and further more, the external improper usage (e. g. Cooking, boiling and frying etc) caused serious damages and lead to corrosion. This sort of corrosion is mainly resulted by men's improper usage.
On the base of pure aluminum, materials called aluminum alloy are formed by adding reasonable metallic elements through industrial technical means. For instance, we compare pure aluminum to cement and element to steel bar and sand. The ferroconcrete come into being is the master stuff in carrying structure of constructions. The combination of aluminum and elements are with the above same truth. So from the aforementioned we could realize that aluminum alloy is. Based on determination, its intensity will exceed common steel structure, it's imaginable that how solid it is. Aluminum alloy is allocated according to the quantity of metallic elements and the differences of sizes. Mean while, it splits into two categories as per production flow relationship, i.e , casted aluminum and deformed aluminum. It doesn't have a fixed code in aluminum alloy which could appear thousands of codes according to it's usage.
2. Classification of Aluminum and Aluminum alloy.
The following table showed the general conception of aluminum and aluminum alloy. Cate gories Pure Aluminum Deformed Aluminum Cast Aluminium Aluminous content > 99% >95% < 90%. They have their won guide lines with their material performance. Anti- corrosion and tenacity is the trait of pure aluminium. The characteristic of Deformed aluminum is that its corrosion resistant and tenacity are the second best to pure aluminium. But its stiffness and comprehensive strength are excellent. However, cast aluminium is more brittle and weaker in corrosion resistant and comprehensive strength although its hardness is good. Therefore, the aluminium alloy applied to industrial will be standardized in material selection according to the production technology and request.
3. The protection and anodic oxidization effect of aluminum and aluminium alloy
Pure aluminium has the best function of anodic oxidization. The anodic oxidization is the fundamental way of surface protection. We briefly call this workmanship as aluminium oxidization. The aim of this oxidization is to prevent the corrosion and increase the intension of aluminium itself. Th other words, it's assumed to cover a protective film on the out layer of the aluminium. This protection layer is sealed and isolated that hiding in the surface of the aluminium. So the function of aluminum oxidization is to resist corrosion and abrasion. Aluminium oxidization divided into chemical oxidization and anodic oxidization. Anodic oxidization is usually adopted by folks. The common oxidization and hard oxidization therein are the most popular, and furthermore, the oxidized function of aluminium alloy is different from that of pure aluminium. From this aspect, deformed aluminium and pure aluminium are equivalent to each other which has comprehensive oxidized functions. There exists a limitation in cast aluminium, normally cast aluminium with better quality is fit to hard anodic oxidization. That means how many the elements contained will directly influence the quality of oxidization. The less the composite elements and single element within stipulation, the better the oxidized function, otherwise, it will be on the contrary.
Aluminium has active molecules and just because of this it has the performance of safeguarding itself. The strong trend of integrating with oxygen (especially from air) is the most special function. So in order to avoid further oxidization,aluminium builds up a kind of compact cover with oxidized film and sequentially enabled aluminium in possession of fine anti corrosion to water (sea water), every kind of elements in space and all kinds of oil and chemical articles. Aluminium will generate a kind of envelope wherever it breaks. It's the selfrecover function and there fore, it can maintain its good quality and withstand exposure to weather without corrosion and fading off.
4. Application of aluminium
There're countless products made of aluminium alloy in the field of industry, agriculture, national defence, military and etc. Why there's such a extensive usage? Because aluminium has improved the physical function drastically. While comparing with other metal, its advantages are integrative. For example, it's light, antirust, environment friendly,higher intensity of pulling and pressing, and it could resist bad environment. With these strong point that enabled aluminium alloy products become demanding to every field. The aluminum industry is growing steadily in this high tech. Age. Aluminium will be the only material to replace other metallic source that is going short.
5. Understanding to accessories of specialized aluminium alloy water meter.
We're quite familiar with the word aluminium alloy, but there're must lots of people don't know its variety of code in quality and characteristic. Because there're many different products formed by aluminium alloy which the shape could not be changed as per it's production tech. In the field of nonferrous metal, the shapes of the brass products can be changed mechanically but aluminium products can not change as easy as that of the brass ones. So the traditional way of cast aluminum alloy is to get the finished products directly while the liquid turning into solid state. In order to meet the shape request by this technical way of cast, same element must be added excessively and heating exceedingly, the original material structure will be defected and caused limitation to oxidization and same even cannot be oxidized. The quality will be damaged by man power. Of course, these products have its market with this quality, hence it's not necessary to ask for higher quality. Regarding to the manufacture of accessories of specialized aluminium alloy water meter, we have overcomed many difficulties and the mail parts are moulded by cast. The pressure- accessories were made by mechanical deformation mathod, but we all select and use the new type material- wrought aluminium that break the traditional cast aluminum. Therefore it's molecule structure and element content do not influence the oxidization. At the same time, it indicates that there's no harmful assembling to products. This is the key point of improving the quality.
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