Electro-Galvanized Steel: How it is Made

Recently we discussed how galvanized steel is made. It is a very interesting process, at least I think so.

electro-galvanized steel coilHow Electro-Galvanized Steel is Made

Today, however, we are going to take a look at a different process application of zinc, electro-galvanization. In the galvanizing process the finish is obtained through a hot-dip or continuous galvanization process. Electro-Galvanized is made through an electrochemical process.

Electrochemical Process

The electrochemical process involves the steel being immersed in a cold zinc bath while an electrical current is run through it. This is also known as electroplating.

electro-galvanized, electrolythic bathThe zinc acts as an anode to protect the steel. An anode is the positively charged electrode (electrical current) that attracts electrons and anions (a negatively charged ion). The steel is preserved from corrosion by cathodes. Cathodes are the negatively charged electrodes that attract cations (positively charged ions).

Conversion coatings are then applied to the metal to enhance the corrosion protection even more. This builds up an additional layer of zinc and chromium hydroxides resulting in a blue tinted finish to the material.

Now that we have had our chemistry lesson for the day, let’s discuss the benefits of electro-galvanized steel.

Benefits of Electro-Galvanization

The electrochemical process allows for a thinner zinc deposit layer so the steel has a higher corrosion resistance and higher performance.

The finish of electro-galvanized is readily paintable. This is an important quality to industries creating products such as trailers, appliances, and agriculture equipment.

Contact your local sales representative to learn more about the quality of our electro-galvanized steel. And stay tuned to learn a little bit more about what electro-galvanized steel is used for.