Batch Hot-Dip Galvanizing Production Process

The batch hot-dip galvanizing process, also known as general galvanizing, produces a zinc coating on iron and steel products by immersion of the material in a bath of liquid zinc. Before the coating is applied, the...
Continue Reading »

Is it possible to have steel with chemistry too good for galvanizing?

It is possible to have steel chemistry with levels of silicon and phosphorus that are too low to meet the minimum thickness levels specified in ASTM A123 and ASTM A153. Very low silicon levels are seen more often on...
Continue Reading »

Why is lead added to the galvanizing bath?

This content is only accessible to AGA Members with a current account. Find out how to become a member.
Members Only »

Zinc Coatings and Applications Chart

The zinc coatings and applications chart displays zinc coatings and their application methods. It provides information on the process, specification details, coating thickness, and application. See the Zinc Coatings...
Continue Reading »

Coating Characteristics of Continuous Sheet Galvanizing

After galvanizing, the continuous zinc coating is physically wiped using air knives to produce a uniform coating across the width of the strip. The uniform coating consists almost entirely of unalloyed zinc and has...
Continue Reading »

Zinc Painting Production Process

Zinc-rich paints typically contain 92-95% metallic zinc in the film of the paint after it dries. The paints are applied by brushing or spraying onto steel cleaned by sand-blasting. While white metal blasting (NACE N...
Continue Reading »

Zinc Plating Production Process

Zinc plating is identical to electrogalvanizing in principle because both are electrodeposition processes. Zinc plating is used for coatings deposited on small parts such as fasteners, crank handles, springs and oth...
Continue Reading »

Coating Characteristics of Zinc-Rich Paint

Organic or inorganic zinc-rich paints are applied to a dry film thickness of 2.5 to 3.5 mils (64 to 90 µm). Organic zinc paints consist of epoxies, chlorinated hydrocarbons, and other polymers. Inorganic zinc paints...
Continue Reading »

Coating Characteristics of Electrogalvanizing

This electro-deposited zinc coating consists of pure zinc tightly adherent to the steel. The coating is highly ductile and the coating remains intact even after severe deformation. The coating is produced on strip a...
Continue Reading »

Zinc Spray

Zinc spray, which is also referred to as metallizing, is done by melting zinc powder or zinc wire in a flame or electric arc and projecting the molten zinc droplets by air or gas onto the surface to be coated. The z...
Continue Reading »