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For aluminum alloy anode products, I believe that the vast majority of people will feel strange, but its anti-corrosion effect is very prominent. Aluminum alloy anode is a kind of professional anti-corrosion product. Compared with sacrificial anode, aluminum alloy anode has its own characteristics in terms of performance and characteristics.
There are many problems in the application of aluminum alloy anode, which is often seen in daily life. And it's very easy to handle. The following is a detailed introduction to the common problems and solutions of aluminum alloy anodizing dyeing.
1¡¢ Can't dye
1. The thickness of anodic oxide film is insufficient. The solution is to check whether the anodizing process is standardized and whether the temperature, voltage, conductivity and other factors are stable. If there is any abnormality, please adjust the specification accordingly. If there is no abnormality, the oxidation time can be appropriately prolonged to ensure that the film thickness reaches the standard.
2. If the pH value of dyeing solution is too high, glacial acetic acid can be used to adjust the pH value to the standard value.
3. After anodizing of aluminum alloy, the workpiece is placed in the water tank for too long. Timely dyeing is advocated. If this situation has occurred, the workpiece can be placed in the anodic oxidation tank or nitric acid neutralization tank for proper activation treatment before dyeing, and the effect will be very good.
4. Improper selection of dyes, need to choose appropriate dyes.
5. The dye has been decomposed or moldy, so it is necessary to replace the dye.
6. The anodizing temperature of aluminum alloy is too low, which leads to the compact film. The oxidation temperature can be raised properly.
7. Poor conductivity. It is possible that the poor contact of anode copper rod or cathode lead plate indicates poor batch conductivity. Pay attention to cleaning anode copper rod and cathode lead plate to ensure good contact.
2¡¢ White spot
1. If the water is not clean, it should be strengthened.
2. The water used for washing is too dirty and easy to pollute the skin film. At this time, the water should be replaced to ensure the quality of washing.
3. The oxide film is polluted by smoke, acid and alkali fog in the air. Strengthening washing, timely staining and timely transfer can greatly reduce the symptoms.
4. The anodic oxidation film of aluminum alloy is polluted by oil and sweat. It is necessary to strengthen the protection and do not touch the surface of the workpiece by hand.
5. There are insoluble impurities in the dye solution, which are polluted by oil and destroy the normal dyeing. At this time, the dye solution should be filtered or replaced.
6. Residual acid flows out from the gap and deep hole of the workpiece, and the water washing shall be strengthened for this kind of workpiece.
7. The dye solution is polluted by Cl - which causes spot corrosion of the dyeing workpiece. At this time, the dye must be replaced. Attention should be paid to avoid introducing impurity ions during operation.
3¡¢ Light color, color difference
1. The thickness of the skin film is uneven. The possible reason is that the temperature and concentration of anodizing bath solution are not uniform, so compressed air mixing should be carried out to solve this problem.
2. If the temperature or concentration of dye solution is not uniform, stirring process can be introduced.
3. The dyeing speed is too fast. The bottom of the workpiece first enters the dye solution and then leaves the dye solution, so the bottom is easy to dye deeply. The solution is to dilute the dye and prolong the dyeing time.
4. Poor conductivity may be caused by loose hanger. Pay attention to fastening to avoid such problems.
5. If the dye is too thin, the dye can be added to increase the concentration.
6. If the temperature of dyeing solution is too low, it can be heated to below 60 ¡æ.
7. Improper dissolution of dyes or the floating of insoluble dyes may cause color difference. The solution is to improve the dye dissolution.
4¡¢ Dyed hair
1. The pH value of dyeing solution is low, so dilute ammonia water can be adjusted to the standard value.
2. If the cleaning is not clean, water washing should be strengthened.
3. The dye dissolves incompletely, and strengthens dissolves completely.
4. If the temperature of dyeing solution is too high, lower the temperature.
5. The porosity of anodic oxide film of aluminum alloy is small, because the oxidation temperature is too low to prevent the film from being dissolved by sulfuric acid. Therefore, the oxidation temperature can be properly adjusted to avoid this problem.
6. If dyeing is too fast and dyeing time is too short, dilute dyeing solution can be adjusted, dyeing temperature can be reduced, and dyeing time can be appropriately prolonged.
7. If the sealing temperature is too low, it can be solved by heating.
8. If the pH value of sealing solution is too low, adjust it to the standard value with dilute ammonia water.
9. The dyeing surface is easy to be wiped off. The main reason is that the skin film is rough, which is generally caused by high oxidation temperature. Attention should be paid to control the oxidation temperature within the specification range.
Shandong Linyi Bosi conductive materials Co., Ltd. is a high-tech enterprise specializing in the production of MMO flexible anode, conductive polymer flexible anode and titanium coated anode, mainly providing corrosion protection, cathodic protection, engineering design, installation and technical services.