Electrophoretic color alumina tube aluminum tube cutting and processing

Introduction to electrophoresis The electrophoresis process is divided into anodic electrophoresis and cathodic electrophoresis. If the paint particles are negatively charged, the workpiece is an anode, and the paint particles are deposited on the workpiece to form a film under the action of the electric field, which is called anodic electrophoresis. On the contrary, if the paint particles are positively charged, the workpiece is a cathode, and the paint particles are deposited on the workpiece to form a film, which is called a cathode. Electrophoresis.
The characteristics of anodic electrophoresis are cheap raw materials (generally cheaper than cathodic electrophoresis) simpler equipment and less investment (generally cheaper than cathodic electrophoresis) and lower technical requirements. The corrosion resistance of the coating is worse than that of cathodic electrophoresis (approximately lifespan/).
Features
The reason why the cathodic electrophoretic coating has high corrosion resistance is that the workpiece is a cathode and no anodic dissolution occurs. The surface of the workpiece and the phosphating film do not damage the electrophoretic coating (generally nitrogen-containing resin) and protect the metal. Functional, and the paint used is of high quality and price.
Process Characteristics
The general process flow of anodic electrophoresis is workpiece pre-treatment (oil removal, hot water washing, rust removal, cold water washing, phosphating, hot water washing, passivation), and anodic electrophoresis workpiece post-treatment (clean water washing and drying).
, remove oil. The solution is generally a hot alkaline chemical degreasing liquid with a temperature of ℃ (steam heating time is about 100 degrees Celsius).
, hot water washing. The temperature is ℃ (steam heating time.
), rust removal. Use or, for example, hydrochloric acid Rust removal liquid, total acidity point, free acidity point, add cleaning agent and wash at room temperature~.
, cold water washing. Wash in cold water in flowing state.
, phosphating. Use medium temperature phosphating (phosphating at ℃) The liquid can be commercially available finished products.
The above process can also be replaced by sandblasting and washing.
Passivation. Use the chemicals matching the phosphating liquid (provided by the manufacturer of the phosphating liquid at room temperature.< br/> , Anodic electrophoresis. The electrolyte composition is black electrophoretic paint, solid content mass fraction ~, distilled water mass fraction ~. Voltage time ~ liquid temperature ~ ℃ paint liquid value ~ Note that the workpiece must be powered off when entering and exiting the tank. During the electrophoresis process, the current follows the paint The film thickening will gradually decrease.
, wash with clean water. Wash with running cold water.
, dry. Dry in the oven at a temperature of ℃~.
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