Q:What is the core process of customizing the color of galvanized sheet?
A:Pre-coated organic coating (color-coated galvanized sheet): one or more layers of organic coating are covered on the surface of the galvanized sheet by roller coating or spraying to form a colored protective layer that has both decorative and corrosion resistance.
Passivation treatment (limited color selection): A thin oxide film is formed on the surface of the galvanized layer through chemical passivation, which can present a specific color, but it is mainly used for corrosion protection and has a limited variety of colors.
Powder coating (customized thick coating): The powder coating is electrostatically adsorbed on the surface of the galvanized sheet and melted at high temperature to form a film, which can achieve a high-hardness, high-weather-resistant colored coating, which is suitable for outdoor high-corrosion scenes and has a wide range of color options.
Q:What types of coatings are there for color coating?
A:Polyester (PE): low cost, rich colors, general weather resistance (lifespan 5-8 years), commonly used in building roofs and interior decoration.
Fluorocarbon (PVDF): UV resistance, strong corrosion resistance, long-lasting color (lifespan of more than 20 years), commonly used in high-end building curtain walls and airport facilities.
Silicone modified polyester (SMP): high temperature resistance, anti-powdering, suitable for harsh environments. Commonly used in industrial plants and high temperature areas.
Q:Can you customize special colors?
A:1. Metallic color/imitation stainless steel effect: Add metal powder (such as aluminum powder) to the paint to achieve metallic luster, often used in high-end decoration or home appliance panels.
2. Matte/glossy surface: Control the glossiness by adjusting the paint formula or coating process (such as matte white, glossy red).
3. Bionic texture: Combine printing and color coating to achieve imitation wood grain, stone grain, camouflage and other patterns (customized embossing rollers and color matching are required).
Q:What are the application scenarios of customized color galvanized steel?
A:1. Construction field:
Colored steel tiles/sandwich panels: customized red, blue, gray, etc. to match the architectural style;
Curtain wall decorative panels: fluorocarbon coating to achieve metallic champagne and bronze colors, used in high-end commercial buildings.
2.Home appliances and 3C products
Refrigerator/washing machine shell: roller-coated white, gold, matte black;
Mobile phone/computer shell: galvanized steel plate surface sprayed with metallic paint, replacing aluminum alloy to reduce costs.
3.Transportation and Industry
Auto parts: chassis parts are sprayed with black anti-corrosion coating, which has both color identification and rust prevention; highway guardrails: sprayed with yellow and green warning colors, using weather-resistant powder coating.
Q:What should you pay attention to when customizing colors?
A:Cost and delivery time: Small batch customization has higher cost (paint mixing and roller replacement are required) and longer delivery time; large batches can be produced on assembly lines.
Weather resistance matching: High weather resistance coating should be selected for outdoor use to avoid fading in 2-3 years; economical polyester coating can be selected for indoor use.
Surface defect control: Scratches on the surface of galvanized sheet and zinc layer leakage will lead to reduced coating adhesion. The quality of the substrate needs to be inspected before customization.