Mirror Finish Aluminum Sheet Polishing Methods

At present, there are two polishing methods for production of the mirror finish aluminum sheet: chemical polishing and mechanical polishing.
mirror finish aluminum sheet
Chemical polishing is a method of eliminating abrasion marks and leveling by selective dissolution of rough areas on the surface of an aluminum sheet by chemical reagents. The basic principle of chemical polishing is that the electrochemical potentials of the constituent phases on the surface of the metal sample are different, resulting in many micro-potentials, which can cause uneven dissolution in the chemical solution. During the dissolution process, a layer of oxide film will be formed on the surface of the sheet. The dissolution and expansion speed of the dissolution on bulging part of the sheet surface is slow due to the thin mucous film. As a result, the polished surface is smooth with small fluctuating waveforms, which can not meet the very ideal requirements. When observed with a microscope at low and medium magnification, this small fluctuation is generally within the objective’s ability to distinguish vertically, and very clear tissues can still be observed.
The principle of mechanical polishing for the mirror finish aluminum sheet is simpler. The engine drives the grinding disc to rotate. There is a strong friction between the disc and the aluminum sheet that rotates on the disc. The cutting force is generated by friction, and the uneven surface of the sheet is smoothed to achieve the polishing purpose. Mechanical finishing enables a sheet to obtain a polishing finish as high as about 0.002 mm, which proves to be higher than that of chemical polishing. Besides, chemical polishing brings about environmental pollution.
Reprinted from http://www.aluminio.cn/mirror-finish-aluminum-sheet-polishing-methods/

评论

发表评论

此博客中的热门博文

Slitting of 1mm 2mm 4mm aluminium strip

图片
What kind of machine is used to make aluminum sheets into 1mm 2mm 4mm aluminium strip belts? Many people might think about a shearing device, but they are actually dealt with by a continuous slitting unit of a similar working principle to that of a shearing device. The difference lies in the point that there is no pause of shearing with a continuous slitting unit. Generally, the mother roll, namely, an  aluminum coil  to be slit, is placed. During the slitting process, the coil roll is divided into several belts which are further rolled into narrow aluminium strip rolls. The slitting method of both  1mm 2mm 4mm aluminium strip  or other aluminum strips can be divided into two types: a straight pull type and a loose sleeve type. The straight pull type refers to the method that aluminum strip rolls are kept in tension from being fed into the unwinding sail to being coiled by the coiling machine, and this production method is suitable for trimming and intermediate slitting. The loop
阅读全文

Embossed Aluminium Coil Patterns And Applications

图片
If you have ever used an escalator you might have noticed that there are partition panels respectively at the bottom and top of the escalator. These partitions are usually paved with  embossed aluminium sheet  coil that have a good pressure bearing capacity and are made of composite metals. As a matter of fact, there are various patterns and applications of embossed aluminium coil, and here we will give a simple introduction. 　　Patterns 　　Aluminum sheets with patterns on the surface is called embossed aluminum sheets or  aluminium tread plate . Pattern shapes include lentils, diamonds, round beans, and oblate mixed shapes. The market is most common in lentils. 　　Application 　　The aluminium tread plate has beautiful appearance, excellent anti-slip property, enhanced performances, and material-saving advantage in production. It is widely used in transportation, construction, decoration, equipment, floor, machinery, shipbuilding and other fields. Generally speaking, clients requi
阅读全文

Diamond Embossed Aluminum Sheet Application

图片
The  diamond embossed aluminum sheet  refers to aluminium sheets with diamond patterns on the surface. In addition to 1000 series, 5005 and 3003 are frequently applied alloys as well. 5005  diamond embossed aluminum sheet s can be used for conductivity materials, cookware, instrument panels, electronic shells and building ornaments. Their anodized film proves to be brighter than that of 3003, and the color matches perfectly with that of 6063 aluminum alloy products. Generally speaking,  diamond aluminum checker plate s are sold by the unit of pieces. In international business the unit of metric ton is frequently used as well. Their thickness ranges from 1.7mm to 8mm, but those between 2mm and 7.75mm prove to be the most popular. The width is from 1010 to 1500, among which 1250 and 1500 are most frequently adopted. Embossed aluminum sheet s with different patterns usually match varied application scope. Five-bar and one-bar sheets are mostly used for anti-skid purposes as tread pla
阅读全文