(5) Spray paint
Used for the external protection and decoration of aluminum alloy hand plate, usually on the basis of oxidation. Aluminum parts should be pretreated before coating to make the coating and the workpiece firmly combined . Generally there are three ways: phosphate (phosphate method), chromium (without chrome) and chemical oxidation.
6) Chemical polishing
The Chemical polishing is the use of aluminum and aluminum alloy manufacture in selective since the dissolution of acidic or alkaline electrolyte solution, to leveling system of polishing surface, in order to reduce its surface roughness, PH of chemical processing method. This polishing method has the advantages of simple equipment, no power supply, and no limitation on the size of aluminum hand plate parts with high polishing speed and low processing cost . The purity of aluminium and aluminium alloy has a great influence on the quality of chemical polishing, The higher the purity, the better the polishing quality, and vice versa.
(7) Passivation
An active metal or alloy in which the chemical activity is greatly reduced and becomes a noble metal state, called passivation Passivation on the surface of aluminum alloy prototype is a method to change the metal surface into a state which is not easy to be oxidized and slow down the corrosion speed of the metal. Corrosion products produced by metals due to the action of media, if they have a dense structure, form a thin film (often invisible). Close covering on the surface of the metal changes the surface state of the metal so that the electrode potential of the metal jumps greatly in the positive direction and becomes a dull state of corrosion resistance. Such as Fe to Fe++ when the standard potential is -0.44v, passivation jump to + 0.5-1v, and shows the corrosion resistance of precious metals, this layer of film is called passivation film.
The above seven methods are commonly used aluminum alloy hand plate surface treatment technology. Duochuang will also pay attention to the latest technical trends of the industry at any time, timely learn and use the latest hand plate surface treatment technology, to bring better appearance and functional experience for the customer's hand plate model.
