Why zinc alloy electrophoresis can only be used with low temperature electrophoresis paint?
With the continuous improvement of electrophoresis technology, cathodic electrophoresis paint can be used together with water-based, oily and anti-QUV color electrophoresis paint paste to prepare a variety of colorful color electrophoresis paints, and electrophoresis paints have safe and environmentally friendly properties. So it plays a very important role in the metal surface treatment industry. However, many zinc alloys, jewellery, and decorations are electroplated after electroplating. The plating layer cannot be destroyed. Too high baking temperature will not work. Therefore, low temperature electrophoresis paint at 100 ° C to 120 ° C will follow the market. The demand was born.
What kind of experience does the appearance of low-temperature electrophoresis paint bring to products such as electro-galvanized alloy? What is the significance?
1. Zinc alloy substrates are widely used in various metal products of various shapes such as handicrafts, luggage accessories and handles. Because of its superior plasticity and high cost performance, zinc alloy is more suitable for the rising price of this raw material. Therefore, many manufacturers choose low-priced products when choosing the material. Zinc alloy is very popular among manufacturers. . However, zinc alloys also have disadvantages such as lower melting points. Zinc alloys are baked at different temperature, otherwise the workpiece will be deformed. The use of high temperature electrophoresis paint on zinc alloy workpiece is limited. With the appearance of low temperature electrophoresis paint, the baking temperature can be cured by dropping to 130 °C, so that the surface treatment of zinc alloy can obtain better electrophoresis coating effect.
2. Because the drying temperature of low temperature electrophoresis paint is low, it does not need to be as high as baking, which can save energy consumption and reduce production cost. Compared with traditional solvent-based coatings and other spray-on or water-based baking varnishes, low-temperature electrophoresis paints can reduce the use of coatings by about 10% after low-temperature cathodic electrophoresis coatings, low-temperature curing and baking, and energy saving can be achieved by 10% reduction in temperature. 10% effect.
3. With the market's specific requirements for the color of the electroplated workpiece, and strengthening the functional requirements such as anti-corrosion and corrosion resistance of the product, it is also necessary to select electroplating before electrophoresis. In the context of this market demand, it is even more important to carry out low-temperature electrophoresis paint protection on the surface of electroplated workpieces. Electrophoresis coating is currently the most suitable coating process for electroplating of electroplated workpieces, electroplated parts and zinc alloys. The workpiece can’t withstand high temperature baking, as long as the high temperature will blisters, low temperature electrophoresis paint just solves this problem.
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