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+--- Thread: The Manufacturing Process of Mill Finish Aluminum Coil (/Thread-The-Manufacturing-Process-of-Mill-Finish-Aluminum-Coil)
The Manufacturing Process of Mill Finish Aluminum Coil - MirandaNip - 12-08-2020
There is the polishing process of the mill finish aluminum coil,including manual degreasing, chemical degreasing, pickling neutralization and chemical polishing. Let’s have a look of its specific process.1. Manual degreasingDetergent: 20-25 ml/LNa3PO4·12H2O: 5-10 g/LTemperature: >70℃2. Chemical degreasingDegreasing is the second key of the entire process. If the grease is not removed completely, it will not only affect the polishing and anodizing quality, but also pollute the polishing liquid and anodizing liquid.NaOH: 2~3g/LNa₂CO₃: 15~25g/LNaHCO₃: 15~25g/LEmulsifier: l~29/LTemperature: >90℃Time: 2~3 min3. Pickling neutralizationHNO3: 30%4. Chemical polishingThe commonly used chemical polishing liquids for aluminum and aluminum alloys are phosphoric acid, sulfuric acid and nitric acid.Nitric acid: 60~65 ml/IHydrofluoric acid: 15-20 ml/LGlycerin: lml/LTemperature: room temperatureTime: 1-2 minOn the one hand, the Nitric acid reacts with Al on the surface to form an aluminum oxide film. On the other hand, the alumina film is dissolved in time to generate aluminum nitrate, which plays a major role in improving the quality of chemical polishing.Hydrofluoric acid is used to increase the brightness. As the general strong acid-containing polishing liquid is prone to over-corrosion, glycerin can act as a corrosion inhibitor to prevent parts from over-corrosion and ensure smooth surface.As analuminum coil provider, Haomei Aluminum has different alloys of mill finish aluminum coils. Welcome to leave message below to get the best aluminum coil stock price.