Method for removing a scale from a superalloy surface

Details Method for removing a scale from a superalloy surface Method for removing a scale from a superalloy surface

1980-06-06

1982-03-02

Caroff, Marc L.

Cleaning and liquid contact with solids

Processes

For metallic, siliceous, or calcareous basework, including...

134 21, 134 2213, 134 27, 134 30, B08B 310

Patent

active

043176852

ABSTRACT:
A method for removing scale, particularly oxide scale, from a surface of a high temperature alloy, the surface having been exposed to high temperature conditions, employs an aqueous alkaline hydroxide solution in contact with the scale in an autoclave. The solution is heated in the autoclave in a non-oxidizing atmosphere at a temperature in the range of about 200.degree.-340.degree. C. while providing relative movement between the solution and the scale. Thereafter, the scale reaction product is flushed from the surface to remove the alkaline solution.

REFERENCES:
patent: 2796366 (1957-06-01), Carter
patent: 3121026 (1964-02-01), Beigay et al.
patent: 3126301 (1964-03-01), Faler
patent: 4073662 (1978-02-01), Borom
patent: 4134777 (1979-01-01), Borom
patent: 4188237 (1980-02-01), Chasteen

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