Steel product with an anticorrosive coating of aluminum alloy and method for the production thereof

US10287440B2 · kind B2 · utility

Assignees

• ThyssenKrupp Steel Europe AG · DE
• thyssenkrupp AG · DE

Inventors

• Marc Blumenau · Hagen, DE
• Oliver Moll · Solingen, DE
• Michael Peters · Kleve, DE
• Thiemo Wuttke · Recklinghausen, DE

Key dates

• Filing date: Jun 30, 2015
• Grant date: May 14, 2019
• Expiry date: Oct 26, 2035

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/12757
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A steel product may include a metallic anticorrosion coating of an aluminum alloy. So that such a steel product possesses high media resistance, more particularly high acid resistance and corrosion resistance, the steel product may be immersed in a liquid-melt coating bath that includes an aluminum alloy. In addition to Aluminum and unavoidable impurities, the aluminum alloy may include at least one of 0.2-2% by weight Mn or 0.2-7% by weight Mg, 0.5-5% by weight Fe, and at least one of 0.05-0.4% by weight Ti or 0.05-0.4% by weight Zr. A method for producing such steel products may involve providing a steel product in a hot-rolled or cold-rolled state, activating a surface of the steel product to remove passive oxides, and coating the surface-activated steel product by immersion in a liquid-melt coating bath that comprises an aluminum alloy having the aforementioned composition.