... of hot dip, electroplating, thermal spraying, zinc-rich coating, powder plating, etc.; 4 chemical production: for sodium hydrosulfite (sodium ... compared with coating of zinc powder, average particle size of 1μm; 5 ultra-fine zinc powder is the manufacture of ... of the reducing agent; 6In addition, micro-zinc powder, superfine zinc powder is widely used in metallurgical industry, battery industry, ...