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Hot forming and cathodic zinc protection are compatible!

Zinc coatings as a means of corrosion protection have been a conventional state-of-the-art technology for many years. The active mechanism of zinc galvanization is so-called cathodic corrosion protection in which a sacrificial coating of zinc on steel parts protects them from oxidation. The sacrificial protection of zinc coatings can prevent components from sustaining damage by corrosion throughout their service life. This also applies to cut edges or scratches in the coating down to the steel substrate.

Zinc coatings are ideal protective layers. The challenge Zink becomes liquid at 420 oC and vaporizes at temperatures above 900 °C. Zinc also leads to a weakening in the course of hot forming by forming microcracks in the steel surface. This was the reason that zinc coatings during the hot forming of press-hardening steels
(phs = press hardening steels) were initially thought to be impossible.

Your ideal partner for component manufacturing

Cornelia Walter

T: +43/50304/15-4356

F: +43/50304/55-4356

E: cornelia.walter@voestalpine.com

Michaela Kraus

Productmanagement ultralights

T: +43/50304/15-75644

F: +43/50304/55-75644

E: michaela.kraus@voestalpine.com

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