How to make out whether good quality and bad quality aluminum profile

Aluminum is divided into raw aluminum and cooked aluminum, raw aluminum is 98% of the aluminum, the nature of contrast brittle hard, can only foundry goods;Cooked aluminum is more than 98% aluminum, soft nature, can be rolled or rolled a variety of vessels.So when ordering aluminum profile, how should distinguish whether it is inferior aluminum profile?

1, the chemical composition is not qualified, in the commodity mixed with a lot of miscellaneous aluminum, aluminum waste aluminum cost is greatly reduced, but it will cause the construction of aluminum chemical composition is not qualified, seriously endanger the safety of the construction project.

2, the residual aluminum profile a lot of cut off time, reduce the loss of chemical reagents, the cost is reduced, but the corrosion resistance of the profile is also greatly reduced.

3. Thin oxide film thickness.The thickness of the oxide film of the built aluminum profile should not be less than 10um(micron).The thickness is not enough, the appearance of aluminum is easy to rust and corrosion.The aluminum profiles of some proletariat, factory address, production license and qualification certificate are only 2 to 4um in oxide film thickness, and some even have no oxide film.According to the expert's budget, each reduction of 1um oxide film thickness can reduce the power consumption cost of 150 yuan per ton of profiles.

4. Chemical composition is unqualified.The aluminum profile mixed with a lot of miscellaneous aluminum and waste aluminum can greatly reduce the cost, but will cause the construction of aluminum profile chemical composition is not qualified, seriously endanger the safety of the construction project.

Shanghai JINLV: unqualified aluminum, due to the influence of air, rain, sunlight and other factors, the use of aluminum deformation, and the formation of glass cracking, falling and other phenomena.