Fabrication and installation phase of a) standard clearance hole in the wall surrounding doors and windows should be controlled at between 25mm-40mm, the maximum size should not exceed 50mm surface treatment of aluminum Which is good, a minimum of not less than 20mm, sash and outer walls there is a certain distance, or should be adopted before the installation and construction of fine aggregate concrete pouring trimmed, prohibited the use of poor quality masonry, mud-brick or mortar directly sintered pad level; b) according to the project circumstances a reasonable choice of cement mortar filling method, one first The mortar is filled in wall mount and a second cavity before filling the aluminum; the second is the aluminum frame fixed before filling mortar. Both methods have advantages and disadvantages, first ensure that the cavity is not formed aluminum hollowing phenomenon, but is easy to produce in the secondary filling cracks and leakage; second method is easy to form the lower sides of the border and it is difficult to avoid Filling dissatisfaction form hollowing phenomenon; c) filling cement mortar cement mortar to be controlled with a specific surface oxidation of aluminum, generally 1: 2.5, to ensure the quality of the surface treatment of aluminum oxide cement factory, it is recommended to add in cement mortar waterproofing agent to improve the anti-leakage performance cement mortar conservation attention, to avoid cracking; d) border around the outer wall of windows and doors 300mm range, increasing Erdao waterproof coating applied to reduce the chance of water leakage; clean up before welding: Aluminium and When welding aluminum, should be strictly removed before welding oxide film and the oil of the workpiece and the wire surface weld; 1) chemical cleaning chemical cleaning high efficiency, stable quality, suitable for clean-wire and size small, mass-produced parts. Available in two French immersion method and scrubbing. Available surface organic solvent acetone, gasoline and kerosene to oil, with a 5% ~ 10% NaOH solution Caustic 40 ℃ ~ 70 ℃ of 3 min ~ 7 min (aluminum take longer but no more than 20 min), mobile water rinse followed by room temperature to 60 ℃ of 30% HNO3 acid solution 1 min ~ 3 min, mobile wash, air dry or low temperature drying. Which surface treatment of aluminum | aluminum rolls | aluminum surface treatment is provided by Jinan Heshun Aluminium Limited. Jinan Heshun Aluminum Co., Ltd. (www.jnhsly.com) (www.jnhsly.cn) 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, service to win market, and sincerely hope to cooperate with the community to create success, to create brilliant. Related businesses welcomed the inquiry, Contact: Zhang.