Base solution for cleaning aluminum

Details Base solution for cleaning aluminum Base solution for cleaning aluminum

1995-09-29

1996-11-05

Warden, Jill

Cleaning and liquid contact with solids

Processes

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

134 3, 134 10, 134 26, 134 27, 134 28, 134 29, 134 41, 252 792, 510108, 510254, 510272, C23G 102

Patent

active

055713360

ABSTRACT:
A solution and solution concentrate for cleaning metal surfaces, particularly aluminum surfaces in which CaO or Ca (OH).sub.2 is added to sulfuric acid to raise the pH to about 13.1 after which the solution is passed through an eleven micron filter and potassium hydroxide is added to raise the pH to greater than 13.8. The resulting concentrate is diluted with water to an appropriate degree, generally 15 parts concentrate to 85 parts of water such as to bring the pH down to a working range of 8.5 to 11.0, degree of dilution depending on the usage.

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patent: 5380468 (1995-01-01), Gober et al.

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