Plum blossoms appear after neutralization. 1) There is a quantitative description a) The relationship between the amount of Zn and the size of the cross-sectional area and the degree of air-cooling. In mid-June, the alloy ingots with high Zn content (0.027% to 0.047%) that are prone to snow spots were placed in the winter. After these alloy ingots were extruded, the same specifications of the profiles were treated with alkali etching. No snow spots appear. b) The size of the snow spot varies, the larger diameter is 5.2mm. The snow spots on the surface of some aluminum profiles are dense, up to 90 per square centimeter area. The distribution of snow spots on aluminum profiles that are 6m long is irregular: some are on one end and the other end is not; some are on this side, the other is not on the other side, and there are several sides. in conclusion (1) The aluminum snow spots produced in summer mostly appear in extruded profiles such as hollow sections with large cross-sectional areas and curtain walls with thick walls. (2) When the Zn content of the extruded aluminum is between 0.02% and 0.045%, whether the surface has snow spots or not is related to the speed of quenching and quenching. (3) In the summer, aluminum profiles with a Zn content of more than 0.02% are produced, and the surface of the profiles is prone to snow spots. In winter, aluminum profiles with a Zn content of less than 0.045% are generally not prone to snow spot defects. (4) Snowflake-like spots on the surface of aluminum profiles are not resistant to corrosion. The product after CL ion reaction in the washing tank or the product reacted with dilute sulfuric acid - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -V elimination of water, a countercurrent in water washing, and hydrous deuteration. Its factors. Tempered Glass Mirror,Stained Glass,Teleprompter Glass,Colored Aluminium Mirror SHANDONG TOP LEADER GLASS CO.,LTD , https://www.topleaderglass.com
Aluminum plum blossom knowledge brief description