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Updated: 2026-07-21

Overview

Zinc dust, commonly referred to as zinc powder or '鼠灰' in Chinese, is a finely divided form of zinc metal. It is widely utilized in industrial processes due to its unique chemical and physical properties. The powder is typically gray in color and is known for its high reactivity, especially in the presence of acids and alkalis. Zinc dust is produced through various methods, including atomization and electrolysis, which determine the particle size and purity of the final product. It plays a crucial role in industries such as coatings, where it acts as a corrosion inhibitor, and in metallurgy, where it is used in galvanizing processes.

Physical and Chemical Properties

Zinc dust exhibits several notable physical and chemical properties. It has a density of 7.14 g/cm³ and melts at 419.5 °C, with a boiling point of 907 °C. The powder is insoluble in water but reacts vigorously with acids, releasing hydrogen gas. It also forms zinc oxide when exposed to air, which can affect its reactivity. One of the key characteristics of zinc dust is its anti-corrosive nature, making it ideal for protective coatings. Additionally, its conductive properties are leveraged in batteries and other electrical applications. The fine particle size of zinc dust enhances its surface area, increasing its reactivity in chemical reactions.

Main Applications

Zinc dust is employed in a variety of industrial applications. In the coatings industry, it is a critical component of anti-corrosive paints, particularly for marine and automotive uses. The metallurgical sector relies on zinc dust for galvanizing steel to prevent rust and extend the lifespan of metal products. Chemical synthesis also benefits from zinc dust, where it serves as a reducing agent in reactions. Additionally, it is used in the production of batteries, especially in zinc-carbon and alkaline batteries, due to its conductive properties. The versatility of zinc dust makes it indispensable in multiple high-performance industrial processes.

Safety and Storage

Handling zinc dust requires adherence to strict safety protocols. The powder is flammable and can form explosive mixtures with air. Proper ventilation and the use of personal protective equipment (PPE) such as gloves and masks are essential to prevent inhalation or skin contact. Storage conditions are equally critical. Zinc dust should be kept in a cool, dry environment, away from moisture and oxidizing agents to prevent unwanted reactions. Containers must be tightly sealed to avoid exposure to air, which can lead to the formation of zinc oxide and reduce the material's effectiveness.

B2B Procurement Guide

When procuring zinc dust for industrial use, several factors must be considered. Purity levels are paramount, as impurities can affect performance in sensitive applications. Buyers should verify supplier certifications and request material safety data sheets (MSDS) to ensure compliance with safety standards. Packaging integrity is another critical consideration, as exposure to moisture or air during transit can degrade the product. Bulk purchases often come with cost advantages, but storage capabilities must be assessed to maintain the material's quality. Comparing prices from multiple suppliers can also help secure the best deal without compromising on quality.