The main points of chemical polishing process for 5083 aluminum plate(1)

The main points of chemical polishing process for 5083 aluminum plate

(1) loading. 5083 aluminum plate and other aluminum profiles chemical polishing before loading, loading the same basic principles as the requirements of ordinary anodic oxidation production.

(2) chemical cleaning degreasing. 5083 aluminum and other aluminum profiles before chemical polishing, especially after mechanical polishing of the aluminum surface may contain grease, generally using high-temperature water or high-temperature steam cleaning, but in addition to go up to covalent bonding of lubricating grease, the method of cleaning is not very clean. Previously used dichloroethylene and other organic solvents degreasing cleaning, but because it contains chlorofluorocarbon organic compounds, will destroy the ozone layer of the atmosphere and is banned, and this cleaning method cost is higher, now most production lines use water containing surfactants capacitive chemical cleaning agent cleaning, the method to remove the surface of 5083 aluminum plate grease is more effective.

(3) Stirring. Mainly using mechanical stirring or oil-free compressed air stirring, not recommended to use manual operation stirring, because the tank liquid for hot concentrated acid composition, has a strong corrosive, in addition to gas has a strong irritation, manual stirring is dangerous, and uniformity is difficult to ensure.

(4) polishing time. 5083 aluminum plate chemical polishing time required usually depends on two aspects: First, the aluminum manufacturing process and the surface quality of semi-finished products; Second, the brightness requirements to be achieved by chemical polishing. Usually chemical polishing time TO 1 ~ 3min. limited polishing time is to prevent the generation of gas defects, but also according to the amount of dissolved aluminum in the tank and temperature.