As a High Quality Lean Coated Tube Supplier, let's continue to talk about what causes the Aluminium Profile to show corrosion.
2. In the smelting process, although the addition ratio of magnesium and silicon is within the range specified by the standard, sometimes the distribution of silicon in the melt is uneven due to uneven and insufficient agitation, and there are localized enriched areas and poor areas. It is directly reflected on the aluminum profile product. When there is a small amount of free silicon in the aluminum matrix, it not only reduces the corrosion resistance of the alloy, but also coarsens the grain of the alloy.
3. Control of various process parameters during extrusion, such as too high preheating temperature of the billet, improper control of metal extrusion flow rate, air cooling strength during extrusion, aging temperature and holding time, etc., are easy to produce silicon segregation and free, so that magnesium And silicon does not completely become the Mg2Si phase, and some free silicon exists.
In short, if the Aluminium Profile is easily corroded during use or because the quality of the Aluminium Profile is too low in production, we should go to the regular manufacturer when choosing the aluminum profile, so that the Aluminium Profile will be more secure.
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