The presence of the oxide film on aluminum and aluminum side also has a protective effect. Because of its relatively dense tissue, strong adhesion to aluminum, can prevent oxidation of aluminum metal to continue to protect the metal from damage. 7075 and higher purity aluminum tubes Which is good quality, against the more favorable corrosion. Because the presence of impurities, in addition to affecting the oxide film and the metal adhesion, but also may cause other forms of corrosion. According to this characteristic of the oxide film, the oxide film for can promote the generation, it does not work with aluminum Which medium 7075, such as nitric acid, cerotic acid, etc., often aluminum as a storage container, while the film from damaging effects of the media, such as hydrochloric acid, alkali and salt, etc., because it can quickly destroy the oxide film, the aluminum corrosion, aluminum is highly corrosive, and therefore the storage medium such as a container can not be aluminum. Production installation stage a) standard windows and openings of the wall surrounding the clearance should be controlled to between 25mm-40mm, the maximum size should not exceed 50mm, the minimum is not less than 20mm, the outer window frame and the wall there is a certain distance or should be used fine aggregate concrete pouring dressing before installation construction, masonry 7075 prohibited the use of low-quality aluminum, such as mud or mortar directly sintered pad level; b) based on the rational use of cement mortar works circumstances filling method, one first mortar filling in aluminum wall installation and a second cavity before filling the timber; the second is the aluminum frame fixed before filling mortar. Both methods have advantages and disadvantages, first ensure that aluminum does not form a cavity hollowing phenomenon, but it is easy to produce in the secondary filling cracks and leaks; second method is easy and both sides of the border to form the next inevitable Filling dissatisfaction formed hollowing phenomenon; c) filling cement mortar to control the mix of cement mortar, generally 1: 2.5 7075 aluminum supply manufacturers to ensure the quality of cement mortar, it is recommended to add water repellent increase in cement mortar cement mortar anti-leakage performance, pay attention to maintenance, to avoid cracking; d) the outer wall around the door frame 300mm range, by James Erdao waterproof coating to reduce the chance of water leakage; good quality 7075 aluminum Which | rolls Aluminum | 7075 aluminum is provided by Jinan Heshun Aluminum Limited. 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.