Home > categories > Minerals & Metallurgy > Aluminum Pipes > Will the size of the aluminum tube become smaller after oxidation?
Question:

Will the size of the aluminum tube become smaller after oxidation?

The company has an aluminum product with high precision (less than 0.1mm). Aluminum profiles manufacturers can do so to achieve this accuracy. However, when the oxidation of the problem, the oxidation process, due to various reasons, there will be repeated rework, repeated oxidation phenomenon.. There is an aluminum oxide 3 times, even after the small 0.06mm. More exaggeration is that there is a small number of aluminum parts, the number of oxidation is five or six times, directly leading to size coordination, delivery, affecting the use of products. The other side also said it is difficult to control the number of oxidation, can not avoid repeated oxidation phenomenon.. Is it really oxidation that leads to smaller size? What's the solution?

Answer:

Of course, the oxidation will become smaller, the oxidation time to be washed by alkali, aluminum meets alkali will react chemically, some of the aluminum will be dissolved. When the aluminum extrusions are extruded before oxidation, the allowance should be included. If the finished product is aluminum rod 10mm its tolerance is +0.10mm, if you need an oxidation in the extrusion, the time should be under the control of the product median +0.02mm is 10.07, the oxidation is 10.05 aluminum rods, of course also need to consider the need to straighten out after the extrusion process, will pull a few small silk. If you really need multiple oxidation, as you say, to shrink 0.06mm, then the size should be controlled after extrusion: the median value of the product is +0.06mm.
In the process of oxidation, there is a change in size.
Will aluminum tubes become smaller after oxidation? Or after the oxidation section factory again suppressed shaping? Arguably, aluminum oxidation texture should become loose, profile factory should also be a set of professional solutions to deal with the possible problems in the deformation of metal products processing, but also should have their own set of data and tolerance of quality control and evaluation... If he can not control the oxidation number of products lead to invalid they can only say, technology has not yet reached the precision products...

Share to: