The first is to see whether there is a significant distortion of aluminum, the surface is smooth, there are no cracks or boldness, scratches, burrs place, if you find any, it is best not to buy. Second, is to carefully check whether the color of the aluminum surface has different shades of color, there is color that shows the quality, but off. Of course, the same model can also put together profiles were compared, of course, if the color is best not to buy too obvious. To check whether the thickness of aluminum sections and marked with the same model. Finally Jinan diamond pattern aluminum, can be used to draw a smooth hard object at the surface of aluminum, will leave a white scratches, aluminum wipe gently and observe, if you can not wipe off, indicating that the quality of the material may have a problem Shandong diamond pattern aluminum manufacturers, but instead if you can easily wipe off, indicating that the surface of the oxide film thickness profiles are qualified. Oxide thickness. The national standard rules of architectural aluminum oxide film thickness of not less than 10um (micron). Thick enough, aluminum exterior is easy to rust, corrosion. Sample testing of some proletarian name, address, consumer promise certificate, certificate of aluminum, oxide film thickness of only 2 to 4um, some even no oxide film. According to experts, the budget is reduced by 1um oxide film thickness, profiles can reduce the power consumption per ton cost more than 150 yuan. Chemical composition failed. The incorporation of a large number of miscellaneous aluminum, scrap aluminum can greatly reduce costs, but will lead to the chemical composition of aluminum construction failure, seriously endanger peace building projects. Reduce the wall thickness profiles. 90 series of sliding-type diamond pattern aluminum, according to the national standard which is not less than the minimum wall thickness of aluminum 1.4mm, some products are only 0.6 to 0.7mm. 46 bomb door type, the national standard use of aluminum is not less than the minimum thickness of 1.62mm, sampling some products only from 0.97 to 1.18mm. A significant reduction in low-grade aluminum diamond pattern aluminum block time professional manufacturers, reducing chemicals consumption, cost reduction, but the corrosion resistance profiles also greatly reduced. Diamond pattern aluminum | Shandong diamond pattern aluminum | rolls Aluminum (certified merchants) provided by the Aluminum Co., Ltd. Jinan rolls. Jinan Heshun Aluminum Co. (www.jnhsly.com) in the field of aluminum products devoted boundless enthusiasm and passion, rolls Alcoa has been customer-centric, for customers to create the concept of value, quality and service to win market share sincerely hope to cooperate with the community to create success, create brilliant. Welcome to the relevant business information, Contact: Zhang.