Compositions – Etching or brightening compositions – Inorganic acid containing
Patent
1982-04-06
1983-02-22
Powell, William A.
Compositions
Etching or brightening compositions
Inorganic acid containing
134 3, 156664, 252148, C09K 1306, C11D 700, C23F 100
Patent
active
043747442
ABSTRACT:
A stripping solution for tin or tin alloys which comprises an inorganic and/or organic acid, an oxidizing agent and a heterocyclic compound free of a sulfur atom but containing a nitrogen atom in the form of .dbd.NH or .tbd.N as a ring-forming member.
REFERENCES:
patent: 4251384 (1981-02-01), Rooney
patent: 4297257 (1981-10-01), Elias et al.
Kawanabe Yutaka
Kishimoto Takeyoshi
MEC Co. Ltd.
Powell William A.
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