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Coating & Paint
The function of UF used in ED coating process
Ultrafiltration (UF) is a pressure driven membrane separation process that uses a specific porous membrane separation method. The pore size of the membrane is 10-3-10-2 μ m, which can intercept and block suspended pigments and high molecular weight resins (with a molecular weight greater than 5000) in the working fluid, while allowing water, organic solvents, inorganic ions, and low molecular weight resins in the working fluid to pass through the membrane. The amount of material that the diaphragm passes through, known as the \"UF\" liquid, is called the transmittance, measured in L/m2. h. Within a certain pressure range, the transmittance is related to the solid content of the working fluid, temperature, and membrane flow rate. Another major performance of ultrafiltration membranes is their retention capacity, which represents the ability of UF membranes to retain substances of high molecular weight, usually expressed in terms of solid retention rate.
The reason for applying ultrafiltration technology in electrophoretic coating process is:
1. Implement a \"closed loop\" cleaning method after electrophoresis to improve the utilization rate of the coating;
2. Reduce the amount of dirt in the rinsing water, decrease the amount of wastewater discharged and the cost of treatment, which is beneficial for environmental protection;
When the conductivity of the working fluid is high, drain the UF solution, add pure water, remove impurities and ions from the working fluid, purify the working fluid, and improve the appearance quality of the coating.
dgkede
2025-11-21
High Salt Spray of KODEST ED COATING
High salt spray test is an important part of the assessment of the corrosion resistance of coatings and KODEST ED coating is significant as a proof of a strong and durable finishing. By far, the most popular application of this coating is on vehicles, and understanding its performance in high salt spray conditions is key to understanding why this is the case. On KODEST ED coating performance at high salt spray, this article describes the finding. Out of This World Corrosive Resistance
Under long term extreme salt spray situations, the KODEST ED coating will resist rust well. The formulation and its application contribute to this superior performance as the coating is uniform, dense, and has almost zero porosity. The coating performs as a neutral barrier that blocks corrosive salt solutions and moisture from entering and forming rust.
KODEST ED coating has shown outperforming independent test results, offering several times longer protection than industry standards for salt spray resistance. This longevity of WearCoat directly relates to longer life of the substrate underneath, avoiding long term time and costs associated with repair.
Uniform Coating and Adhesion
The KODEST ED coating provides consistent quality and uniform deposition, a necessary condition for optimum corrosion protection. This uneven coating results in points of weakness where salt spray can simply work its way through and rust begins ocorrência. The application process of KODEST is much more precise which reduces these vulnerabilities.
The KODEST ED coating also exhibits strong adhesion to wide range of substrates such as steel and aluminum which is also very important to prevent delamination under stress such as the stress induced by salt spray test. This allows the coating to maintain for an extended period and protect the underlying surface thoroughly.
Cost-Effectiveness
KODEST ED coating is a cost-effective solution as despite a marginally higher investment than some alternatives, the vast increase in usefulness and level of corrosion protection achieved more than pay off the initial investment. Less frequent recoating and replacement means long-term maintenance ends up costing significantly less, resulting in a positive ROI.
Additionally, businesses from all industries benefit from reduced idle time and lower replacement costs due to the longer life of parts treated with KODEST ED coating, therefore making it an economical option.
Under long term extreme salt spray situations, the KODEST ED coating will resist rust well. The formulation and its application contribute to this superior performance as the coating is uniform, dense, and has almost zero porosity. The coating performs as a neutral barrier that blocks corrosive salt solutions and moisture from entering and forming rust.
KODEST ED coating has shown outperforming independent test results, offering several times longer protection than industry standards for salt spray resistance. This longevity of WearCoat directly relates to longer life of the substrate underneath, avoiding long term time and costs associated with repair.
Uniform Coating and Adhesion
The KODEST ED coating provides consistent quality and uniform deposition, a necessary condition for optimum corrosion protection. This uneven coating results in points of weakness where salt spray can simply work its way through and rust begins ocorrência. The application process of KODEST is much more precise which reduces these vulnerabilities.
The KODEST ED coating also exhibits strong adhesion to wide range of substrates such as steel and aluminum which is also very important to prevent delamination under stress such as the stress induced by salt spray test. This allows the coating to maintain for an extended period and protect the underlying surface thoroughly.
Cost-Effectiveness
KODEST ED coating is a cost-effective solution as despite a marginally higher investment than some alternatives, the vast increase in usefulness and level of corrosion protection achieved more than pay off the initial investment. Less frequent recoating and replacement means long-term maintenance ends up costing significantly less, resulting in a positive ROI.
Additionally, businesses from all industries benefit from reduced idle time and lower replacement costs due to the longer life of parts treated with KODEST ED coating, therefore making it an economical option.
dgkede
2025-11-20
conductivity of electrophoretic coatings and working fluids
Conductivity, also known as specific conductivity, refers to the amount of conductivity on a 1cm2 pole surface with a spacing of 1cm. In the electrophoretic coating process, the conductivity of the working solution, UF solution, polar solution, and pure water used is expressed by conductivity. The unit of conductivity is µ s/cm.
The conductivity of electrophoretic working fluid is related to factors such as the solid content, pH value, temperature, and impurity ion content of the working fluid. It is one of the important process parameters for electrophoretic coating and should generally be controlled within a certain range. The size of the range depends on the type of electrophoretic coating, and high or low conductivity of the working fluid is not good, which directly affects the quality of electrophoretic coating.
dgkede
2025-11-18
GEL score determination method
（1） Test steps
Soak solvent solution (already at room temperature) – first step
1. Weigh the quality of phosphating steel plate (0.001g, accurate, as shown in W0)
2. Submit the paint film sample (conventionally, cured in a dryer, placed in the dryer, and weighed. W1 (mil gram accurate) (3×0.001).
3. 24 h (room temperature) in the corresponding mixed solvent (shaking)= sample and filter paper washing (the surface shows about wiping the remaining solvent)
4. The sample was then dried using the oven at 105 ℃ for 30 minutes which was after removing from the oven and cooled in the dryer system until it achieved room temperature which before cooling unit. Then, it is placed on a precision scale (0.001 g) and recorded as W2 (densimeter mass + solution mass + precipitate mass + air).
Soak solvent solution (already at room temperature) – first step
1. Weigh the quality of phosphating steel plate (0.001g, accurate, as shown in W0)
2. Submit the paint film sample (conventionally, cured in a dryer, placed in the dryer, and weighed. W1 (mil gram accurate) (3×0.001).
3. 24 h (room temperature) in the corresponding mixed solvent (shaking)= sample and filter paper washing (the surface shows about wiping the remaining solvent)
4. The sample was then dried using the oven at 105 ℃ for 30 minutes which was after removing from the oven and cooled in the dryer system until it achieved room temperature which before cooling unit. Then, it is placed on a precision scale (0.001 g) and recorded as W2 (densimeter mass + solution mass + precipitate mass + air).
dgkede
2025-11-11
REPORT