Patent · US Expired

High temperature protective coating

US4909984A · kind A · utility

10Cited by

2References

4Claims

0Family size

Assignee

BBC Aktiengesellschaft, Brown, Boveri & Cie · CH

Inventors

Lorenz Singheiser · Heidelberg, DE
Georg Wahl · Rodenbach, DE
Bernd Jahnke · Neckargemünd, DE

Key dates

Filing date	Dec 29, 1988
Grant date	Mar 20, 1990
Priority date	—
Expiry date	Dec 29, 2008

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/12944
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

A high temperature protective coating formed by an alloy on the basis of nickel, cobalt, chromium, aluminum and also frequently of yttrium. There is improved adherence of the metallic oxide covering layer which forms on the protective coating and increased the oxidation and corrosion resistance. Silicon may be admixed to the alloy as a first addition. The amount of the silicon to be admixed to the alloy lies between 1 and 3% by weight. The oxidation and corrosion resistance can be increased by means of a further addition of zirconium in an amount of 1% by weight. The same results can be obtained by a further addition of tantalum, also in the amount of 1% by weight.

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