Alkaline cleaning compositions non-corrosive toward aluminum sur

Details Alkaline cleaning compositions non-corrosive toward aluminum sur Alkaline cleaning compositions non-corrosive toward aluminum sur

1983-02-11

1984-07-03

Caroff, Marc L.

Cleaning and liquid contact with solids

Processes

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

134 29, 134 40, 252135, 252139, 252140, C23G 122

Patent

active

044573227

ABSTRACT:
An alkaline composition and method of cleaning aluminum surfaces is disclosed which avoids discoloring or tarnishing of the metal surface. The composition comprises a mixture of alkali metal metasilicate and a compound chosen from the group consisting of sodium carbonate, potassium carbonate, lithium carbonate, potassium orthophosphate and sodium orthophosphate and mixtures thereof, wherein the metasilicate salt is present in an effective amount up to about 3% by weight of the composition and wherein the pH ranges above about 12.0.

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patent: 4048121 (1977-09-01), Chang
patent: 4093566 (1978-06-01), MacNamara et al.
patent: 4116849 (1978-09-01), Leikhim
patent: 4116851 (1978-09-01), Rupe et al.

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