Cleaning and liquid contact with solids – Processes – For metallic – siliceous – or calcareous basework – including...
Patent
1985-01-14
1986-10-28
Castel, Benoit
Cleaning and liquid contact with solids
Processes
For metallic, siliceous, or calcareous basework, including...
134 41, 156665, 252 791, 252 795, C23G 102
Patent
active
046197079
ABSTRACT:
Aluminum diffusion layers are removed from work piece surfaces, especially compressor and turbine blades, by exposing the respective surface areas to an aqueous solution of nitrobenzenesulfonic acid preferably in combination with other components, such as sodium compounds. Depending on the thickness of the layer to be removed the exposure time is within the range of about 30 to 90 minutes at a temperature below about 50.degree. C.
REFERENCES:
patent: 2649361 (1953-08-01), Springer et al.
patent: 3300349 (1967-01-01), Tershin et al.
patent: 3356550 (1967-12-01), Stiffler et al.
Hirschmeier Manfred
Kreitl Josef
Castel Benoit
Fasse W. G.
Kane, Jr. D. H.
MTU Motoren-und Turbinen-Union Muenchen GmbH
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