Method for aluminizing a ferritic workpiece by coating it with an aqueous alumina slurry, adding a halide activator, and heating
AssigneeThe Babcock & Wilcox Company
InventorsThomas L. Davis, Dale F. LaCount, Steven E. LeBeau, Kenneth D. Seibert
Life of this patent
Estimating the term…
Abstract
An improved method for aluminizing a ferritic material by forming an aqueous aluminum slurry composition, applying the aqueous aluminum slurry composition to the ferritic material to form a coating, adding a halide activator to the coated ferritic material and heating the coated ferritic material to a temperature of about 1275.degree. F. to about 1300.degree. F. for approximately 24 hours. The use of the lower temperature thermal cycle minimizes the change in the mechanical properties of a steel substrate.
Claims3
A method for aluminizing a ferritic workpiece, comprising the steps of;
- forming an aqueous aluminum slurry composition, the aqueous aluminum slurry composition comprising methyl cellulose, alumina, aluminum powder and water;
- applying said aluminum slurry composition to the ferritic workpiece to form a coating;
- adding a halide activator to the coated ferritic workpiece;
- and
- heating the coated ferritic workpiece to a temperature of about 1275.degree. F. to about 1300.degree. F. for approximately 24 hours.
Dependencies are inferred from the claim text.