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Coating & Paint
Testing method for bacterial test strips
Bacterial test strips can be used to detect bacteria in the entire coating production system at any time. Using bacterial test strips to detect bacterial content does not require preparation time and can be tested at any time to quickly obtain results: bacteria (24-48 hours); Mold and yeast (72 hours). No need to conduct additional microbiological experiments, thus saving time and costs. The detection results are accurate and reliable, which can provide timely and effective monitoring of the bacterial content in the electrophoresis paint tank solution and provide a basis for taking sterilization measures. Bacterial test strips can also be used to monitor other systems on the coating line, such as anode systems, water flushing systems, etc. Using bacterial test strips is easy to operate, even people without microbiology training can operate them.
dgkede
2025-12-12
The working voltage, breakdown voltage, and critical voltage of ED coating
In the field of ED coating, the working voltage (or coating voltage) of ED coating is the voltage applied between the two poles to achieve excellent paint film appearance and specified paint film thickness. The painting voltage has a certain range. When it exceeds the upper limit of the painting voltage, the reaction on the electrode intensifies, producing a large amount of gas, causing the deposited paint film to explode, break down, and produce abnormal adhesion. This voltage value is called the breakdown voltage.
On the contrary, when the voltage value is lower than the lower limit of the working voltage, almost no paint film can be deposited (or the deposition and re dissolution of the paint film are offset), and this voltage value is called the critical voltage. The working voltage of electrophoresis is between the critical voltage and the breakdown voltage.
Working voltage is one of the important process parameters for ED coating. Under the premise of keeping other coating conditions constant, the thickness of the coating film and the penetration force are directly proportional to the coating voltage. During the production process, adjusting the coating voltage is often used to control the thickness of the coating film.
dgkede
2025-12-08
Temperature control system of ED caoting
In the electrophoresis process, the temperature of the bath solution will increase due to factors such as electrification, circulation of the bath pump, entry of heated workpieces (if using a drying furnace), and construction environment. The suitable working temperature for electrophoresis bath solution is 28 ± 2 ℃. Temperature deviation can affect the thickness and appearance of the coating, causing surface defects.
When the temperature is too low, the film thickness will decrease and the surface will become rough; When the temperature is too high, the paint thickness will increase, the paint film will be unstable, there will be surface defects, and it may also cause damage to the ultrafiltration device.
The temperature of the circulating electrophoresis tank solution is controlled through a stainless steel heat exchanger, which uses 7 ℃~15 ℃ water to cool or 30 ℃~45 ℃ water to heat the tank solution.
dgkede
2025-12-05
(KODEST)Electrophoretic coating equipment - curing system
Gas direct heating curing furnace is a common type of electrophoretic curing furnace. This kind of curing oven has the ability to cure all depressions, plus its operating cost is only more cost-effective as well. Occasionally, the radiation zone is also set on the entrance of the curing oven, and the wind speeds in this area are lower, enabling less dust in the air to distort and lower the toxicity of the coating at the surface after curing, allowing it to be less easily polluted by pollutants.
A heating channel is sometimes also established as a dehydration zone. The temperature of the workpiece is 60 ℃~70 ℃, and heated 2-3 minutes, the entrance of the curing furnace is the dehydration zone.
A heating channel is sometimes also established as a dehydration zone. The temperature of the workpiece is 60 ℃~70 ℃, and heated 2-3 minutes, the entrance of the curing furnace is the dehydration zone.
dgkede
2025-12-04
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