Chemical milling IN-100 nickel superalloy

Details Chemical milling IN-100 nickel superalloy Chemical milling IN-100 nickel superalloy

1983-12-05

1985-08-13

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

134 3, 156654, 156664, 252 792, 252 793, 252 794, C23F 100, B44C 122, C03C 1500, C03C 2506

Patent

active

045348235

ABSTRACT:
Chemical milling of the commercial gamma-gamma prime nickel superalloy IN-100 is carried out by using an aqueous solution comprised of 32.5-85 volume percent HCl, with other ingredients proportioned on the HCl, preferably 40 ml/l nitric acid, 0.0141 M/l metal sulfate ion, 0.0326 M/l metal chloride ion, 0.0168 M/l alkali metal ion and 0.0073 M/l citric acid. The chemical milling is particularly effective in uniformly removing a small amount of surface layer without any deleterious attack. It hereby is useful to improve the effectiveness of surface penetrant inspection, to find small flaws which would otherwise be concealed by a worked surface layer.

REFERENCES:
patent: 3975245 (1976-08-01), Berquist et al.
patent: 4247377 (1981-01-01), Eckler et al.
patent: 4339282 (1982-07-01), Lada et al.
patent: 4353780 (1982-10-01), Fishter et al.

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