Method for Preparing Water-Based Aluminum-Silver Paste
Release date:
2020-10-31
How is water-based aluminum silver paste prepared? We all know that water-based aluminum silver paste boasts exceptional performance, offering excellent water resistance and outstanding weatherability, making it highly popular in the market. It’s primarily used in products like sports equipment, electrical appliances, and interior/exterior decorations for buildings. But do you, our viewers, truly understand the preparation methods of water-based aluminum silver paste? Let me walk you through it right now! Before diving into the specifics, let’s first explore the common basic concepts of water-based aluminum silver paste. This eco-friendly product differs significantly from conventional oil-based aluminum silver paste—it’s soluble only in water, making it ideal for water-based coating systems. You can directly pre-disperse it using water. However, if you’re using tap water, be sure to let it sit uncovered for at least 24 hours beforehand. This allows any residual chlorine to fully evaporate, as free chloride ions can severely corrode the silver paste. Currently, there are four widely used methods for preparing water-based aluminum silver paste: 1. **Addition of Corrosion Inhibitors**: During the coating process, corrosion inhibitors are added. This method has minimal impact on the color and brightness of the original oil-based silver paste. It’s cost-effective and time-efficient, making it particularly popular overseas. 2. **Chromic Acid, Phosphoric Acid, or Their Salts Passivation Method**: This technique is known for its low production costs, short processing time, and superior product brightness. It effectively preserves the original color and luster of the oil-based silver paste, which makes it a favorite in industries like coating and printing. However, with increasingly stringent environmental regulations, this method has gradually declined in popularity. 3. **Inorganic Silica Coating Method**: Products made using this method closely resemble the original color and brightness of oil-based silver paste. They exhibit excellent acid- and alkali-resistance and feature a dense coating layer, ensuring stable performance. Finished paints formulated with this method can typically be stored for 6 to 12 months. 4. **Inorganic-Organic Double-Layer or Hybrid Coating Method**: Also referred to as the "double-coating process," this method remains relatively rare in the market due to its complex manufacturing process, high costs, extended production cycles, and significant color loss. Nonetheless, it delivers unparalleled resistance to acids, alkalis, and shear forces, making it an excellent choice for demanding applications. That wraps up our discussion on "How to Prepare Water-Based Aluminum Silver Paste." Stay tuned for more industry insights in our next installment!
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