Patent · US Active

Duplex-phase CrAl coating for improved corrosion/oxidation protection

US9689270B2 · kind B2 · utility

1Cited by

6References

20Claims

0Family size

Assignee

MTU Aero Engines AG · DE

Inventors

Horst Pillhoefer · Weingarten, DE
Stefan Mueller · Villingen, DE
Erwin Bayer · Dachau, DE
Thomas Dautl · Weichs, DE

Key dates

Filing date	Aug 8, 2013
Grant date	Jun 27, 2017
Priority date	—
Expiry date	May 28, 2035

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/12639
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

Disclosed is a coating for protecting a component against high temperatures and aggressive media, which coating has at least one subregion whose main constituent is chromium. The layer additionally comprises aluminum, the chromium content at least in the subregion in which chromium is the main constituent being greater than 30% by weight and the aluminum content being greater than or equal to 5% by weight. The invention further provides a process for producing such a coating, comprising chromizing the surface to be coated and subsequently alitizing the chromium-rich layer produced during chromizing.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.