To Certify or Not to Certify

A question that is often posed to the American Galvanizers Association (AGA) is why there isn’t an industry certification program for hot-dip galvanizers. The AGA and our members have long maintained the “certificat...
Continue Reading »

Why does the galvanized coating thickness depend on the steel thickness?

The hot-dip galvanized coating is an intermetallic layer of iron and zinc, meaning the zinc and iron react and diffuse into one another to create the galvanized coating. If more iron is available to react with the z...
Continue Reading »

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 »

How is zinc added to the galvanizing kettle?

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

Can 4130 steel be successfully galvanized?

4130 steel is a chromoly steel. Steels of this chemistry have presented some adherence problems in the past when galvanized. The galvanized coating developed in some areas but not others. It would be best to try ga...
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 »

How long does it take to convert Chromium VI to Chromium III on galvanized steel?

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

How can hot-dip steel be dulled or deglared?

Some types of steel come out of the kettle with a matte gray finish and others come out of the kettle with a bright and shiny finish. The type of finish you will get depends on the chemistry of the steel. There are...
Continue Reading »

Continuous Sheet Galvanizing Production Process

The continuous hot-dip coating process is a widely used method originally developed over fifty years ago for galvanizing of products such as steel sheet, strip, and wire.  The molten coating is applied onto the surf...
Continue Reading »

Flux Inclusions

Flux inclusions can be created by the failure of the flux to release during the hot-dip galvanizing process. If this occurs, the galvanized coating will not form under the flux spot.  If the area is small...
Continue Reading »

12