Process of etching iron-silicon-aluminum trialloys and etchant s

Details Process of etching iron-silicon-aluminum trialloys and etchant s Process of etching iron-silicon-aluminum trialloys and etchant s

1991-03-21

1992-05-19

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

156664, 156662, 752 793, B44C 122, C23F 100

Patent

active

051145324

ABSTRACT:
An etchant for etching iron-silicon-aluminum trialloys comprises a one liter aqueous solution of ammonium bifluoride and nitric acid in the range of about 0.03 to 0.1 Moles of ammonium bifluoride and 3.5 to 10 Moles of nitric acid with the remainder being water. The etch is applied directly to the iron-silicon-aluminum trially at room temperature in an isotropic and isothermal process.

REFERENCES:
patent: 2711364 (1955-06-01), Beach
patent: 2719781 (1955-10-01), Hesch
patent: 3106499 (1963-10-01), Kendall
patent: 3107188 (1963-10-01), Hancock
patent: 3607480 (1971-09-01), Harrap
patent: 4454014 (1984-06-01), Bischoff
patent: 4614607 (1986-09-01), Loch
patent: 4875970 (1989-10-01), Takeya et al.

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