Electrophoretic coating represents a pinnacle in coating technology. This method involves immersing the target object in a water-soluble paint bath, where it acts as the anode (anodic electrophoresis). A corresponding cathode is established, and a direct current flows between these two electrodes. This causes paint to uniformly coat the object’s surface through the combined physical and chemical effects of the current.
The typical process flow for electrophoretic coating on metal surfaces is meticulously structured as follows: Pre-cleaning → On-line → Oil removal → Washing → Rust removal → Washing → Neutralization → Washing → Phosphating → Washing → Passivation → Electrophoretic coating → Cleaning in the tank → Ultra-filtration → Drying → Off-line.
Electrophoretic coating encompasses four concurrent processes that work in harmony to achieve a superior finish.
1. Electrophoresis: Here, under the influence of a DC electric field, positively and negatively charged colloidal particles migrate towards their respective opposite poles, a phenomenon also referred to as swimming.
2. Electrolysis: This involves redox reactions occurring separately at each electrode, leading to oxidation and reduction phenomena on the respective electrodes.
3. Electrodeposition: Due to electrophoresis, charged colloidal particles move towards the anode near the template surface, release electrons, and deposit in an insoluble state. This results in the formation of a paint film through a precipitation phenomenon.
4. Electroosmosis: While the solid phase remains stationary under the electric field, the liquid phase moves. Electroosmosis expels water from the paint film to its exterior, eventually forming a dense paint film with minimal water content and high resistance, impervious even to electric currents.
5. Taking iron red epoxy electrophoresis paint as an example: The system involves modified epoxy resin, butanol, ethanolamine, talc, and iron red substances. When mixed with distilled water and subjected to a DC electric field, this mixture separates into positively charged cations and negatively charged anions, undergoing a series of complex physical, chemical, and electrochemical changes.
Electrophoretic coating boasts rapid application speeds and supports mechanized, automated, and continuous operations. This minimizes labor intensity and ensures a uniform, strong, and smooth paint film, even on parts that are typically difficult to coat, like the welding seams of fascia plates.
The efficiency of paint utilization in electrophoretic coating is remarkably high, ranging from 90% to 95%. Since this method uses water as a solvent, it offers significant advantages such as non-combustibility, non-toxicity, and ease of operation.
The dried paint film achieved post-electrophoresis exhibits superb adhesion, enhanced rust resistance, superior corrosion resistance, and excellent weather resistance, outperforming ordinary paints and traditional application methods.
Our state-of-the-art paint spraying line is engineered to seamlessly automate the surface coating process, providing a vibrant array of colors and decorative finishes with unparalleled precision. Developed by Shandong Bonita Machinery Co. Ltd, this innovative system offers rapid, uniform spraying that significantly boosts efficiency and minimizes energy consumption. The added auxiliary automatic leveling device effortlessly handles the nuances of varying material lengths, ensuring a flawless, fully automated process.
1. Experience lightning-fast speeds, uniform application, and high efficiency, all while enjoying low energy consumption. This system delivers output levels 4-5 times greater than traditional labor-intensive methods.
3. Our customizable quick color change system is designed to meet your unique requirements, drastically reducing gun cleaning time between color swaps and maximizing equipment utilization.
4. Benefit from centralized control, making operation and maintenance incredibly convenient and user-friendly.
5. The advanced upper and lower conveying track system, tailored for both long and short materials, features an auxiliary automatic leveling device, ensuring a smooth, fully automated lowering process for effortless handling.
6. Leverage our extensive expertise in painting processes with a design that prioritizes simplicity and smoothness. Our system ensures straightforward operation and quick training for workers.
7. Automatically adjust the spray gun angle according to the product’s size and shape, ensuring optimal coverage and precision.
Ideal for both paint and plastic treatments, our powder spraying line integrates seamlessly with suspension conveyors, electric rail trolleys, and ground conveyors, optimizing the entire transportation operation.
Our comprehensive powder spraying line includes critical components such as the powder spraying system, pretreatment equipment, painting apparatus, ovens, heat source systems, electric control systems, and suspension conveyor chains. The process flow encompasses pre-treatment, powder coating, heating, and curing.
Advantages of Automatic Powder Spraying Equipment:
1. Automatic powder spraying equipment not only slashes labor costs but also elevates product quality and ensures consistent output, addressing productivity shortfalls with ease.
2. During the spraying construction process, our automatic equipment does not emit irritating odors, preventing environmental pollution and safeguarding the health of operators.
3. Achieve an initial powder spraying utilization rate of 70%-80% with coating thicknesses ranging from 60-150 microns. Additionally, the recyclable powder coating boosts overall utilization to 90%-98%, delivering a robust single-coating application.
4. Our solvent-free powder coating solution eliminates the risks associated with solvents, providing a safer and more environmentally friendly option.
5. Post-curing, the powder coating exhibits high plumpness and soft color. Its solvent-free composition prevents the formation of pinholes and bubbles, while its solid nature eliminates leakage and evaporation during transport, ensuring a pristine finish.
Q1: What are your packing terms?
A: Typically, we ensure our products are well-protected by using thicker bubble paper. For additional security, some items are also packed in sturdy cartons.
Q2: What are your payment terms?
A: We accept payment by T/T, with 30% as the deposit to initiate production and the remaining 70% balance to be settled before delivery. Prior to the final payment, we will provide you with detailed photos of the products and packaging.
Q3: What are your delivery terms?
A: Typically, our quotations are based on FOB Qingdao. However, we are flexible and can accommodate other terms such as EXW, FOB, CFR, CIF, and DDU.
Q4: What is your delivery time?
A: Generally, the delivery time is project-dependent due to the customized nature of our products. If your required voltage differs from our standard 380V/3PH/50Hz, the delivery will take longer to source custom-made motors or electric components.
Q5: Can you manufacture according to technical drawings?
A: Absolutely. We can produce items based on your technical drawings or specific requirements, and we also offer the service of creating drawings for you.
Q6: How do you ensure long-term and strong business relationships?
A1: We focus on maintaining high product quality and competitive pricing to provide maximum benefit to our customers.
A2: We treat every customer with respect, considering them as friends. Our approach to business is sincere, fostering genuine relationships regardless of the customer's origin.
A3: No matter where our customers are from, we always aim to build lasting and amicable business partnerships.
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