Depending on the metal elements containing aluminum, aluminum can be divided into nine categories, that is, can be divided into nine series, following a step by step outline the 1000 series represents the 1000 series aluminum is also known as pure aluminum, in all series 1000 series is the largest aluminum content of a series. You can reach more than 99.00% purity. Second, the 2000 series aluminum representatives 2A16 (LY16) 2A12 (LY12) 2A06 (LY6) 2000 series aluminum is characterized by high hardness, which the copper content, probably in about 3-5%. 2000 series aluminum is aluminum painted aluminum aviation purposes, not often in conventional industrial applications. Low-density aluminum alloy, high strength, high thermal conductivity aluminum painted manufacturers, corrosion resistance strong, with good physical properties and mechanical properties of pre-painted aluminum, which are widely used in various industries due to improper selection of welding methods, resulting alloy deformation of aluminum and other serious impact on the surface of the oxide film product quality and performance before welding preparation by chemical or mechanical methods specializes in producing pre-painted aluminum, strict clean up on both sides of the mouth of the weld groove. Chemical cleaning is the use of alkali or acid cleaning the surface, the method can remove the oxide film, but also in addition to oil, the specific process is as follows: volume fraction of 6% to 10% sodium hydroxide solution, at about 70 ℃ soaked 0.5min → washing → volume fraction of 15% nitric acid at room temperature By soaking 1min neutralization treatment → washing → washing → drying temperature alloy surface after a good wash as dull silver. mechanical cleaning can be pneumatic or electric cutter, can be applied to the blade, rasp and other tools, for thin oxide film can also be polished 0.25mm copper wire brush to clear the oxide film immediately cleaned up after welding, if you place more than 4h, specializing in the production of clean-up should be re-painted aluminum |.. cis Alcoa (certified) | Color coated aluminum supplied by Alcoa Ltd. Jinan rolls. Jinan Heshun Aluminum Co. (www.jnhsly.com) Shandong Jinan, aluminum products leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Aluminum leadership in cis with the staff warmly welcome all inquiries negotiations to create a better future for aluminum rolls.