Why sandblasting oxidation process is often used in CNC lathe processing
At first glance,I saw this explosion-proof lamp holder.Xiaobian thought it was made of plastic.Xiaobian was wondering if the product description on our website was wrong.So I went to ask the boss,is this dark thing painted aluminum?The boss said yes.Xiaobian is still not sure,just ask her,is it made of aluminum?The boss said that all aluminum alloys are treated by sandblasting oxidation.Seeing this sentence,Xiaobian confirmed that the product description on the website is correct.What kind of process is sand blasting?Why should aluminum alloy be oxidized by sandblasting?Later,Xiaobian went to generalize it.
The specific instructions are as follows:
1.Prevention of corrosion of aluminum products Since the film layer obtained by anodization has sufficient stability in the atmosphere,an oxide film on the surface of the aluminum can be used as a protective layer.The oxide film obtained by anodizing aluminum in chromic acid solution is dense and corrosion resistant;the pores of the oxide film obtained from the sulfuric acid solution are larger than the former,but the film layer is thick and the adsorption capacity is strong.The proper filling and sealing treatment also has good corrosion resistance.In particular,the chromic acid anodization method is particularly suitable for anodizing of rivets and weldments.
2.Improve wear resistance By hard anodizing aluminum and aluminum alloy,a thick and hard Al2O3 film layer can be obtained on the surface.This film not only has a high hardness and thickness,but also has a low roughness.In a sulfuric acid or oxalic acid solution,a hard and thick oxide film can also be obtained on an aluminum article by anodization.The porous thick oxide film can store lubricating oil,so it can be effectively applied to aluminum products working in a friction state,such as engine cylinders and pistons of automobiles and tractors,which can greatly improve the wear resistance after anodizing.
3.The oxide film obtained by anodizing the electrical insulator aluminum and aluminum alloy products has a large electrical resistance,so it has a certain effect on improving the electrical insulation of some products,and the capacitor can be prepared by anodizing.The electrical layer can also be made of alumina to prepare an insulating layer for its surface.
4.In addition to the decorative effect,the surface finishing requirements of aluminum and aluminum alloy paper products are very high.The sandblasting oxidation process can meet this requirement.After chemical or electrochemical polishing,sulfuric acid is used again.The solution is anodized to obtain an oxide film having a higher transparency.This oxide film can absorb a wide variety of organic and inorganic dyes to have a variety of vivid colors.This color film is both an anti-corrosion layer and a decorative layer.Under some special process conditions,a protective decorative oxide film similar in appearance to porcelain can be obtained.
Combining the advantages of the above several sandblasting oxidation processes,I think it is not difficult for everyone to understand why the sandblasting oxidation process is often used in CNC lathe machining.Jiezhong company mainly produces(processing custom to map custom)all kinds of precision metal parts,such as precision CNC machining,CNC metal processing,CNC lathe processing,metal stamping,plastic injection molding,mold processing.