Rust converting and removing compositions

Details Rust converting and removing compositions Rust converting and removing compositions

1986-08-04

1989-04-25

Lieberman, Paul

Compositions

Dust suppressants for bulk materials, or processes of...

252142, 252146, 252387, 252388, 257399, 134 3, 134 41, 134 4, C02F 510, B08B 700

Patent

active

048245895

ABSTRACT:
A rust converting composition comprises ascorbic acid, lignin sulfonate, and a water insoluble polymer, such as polyvinylpyrrolidone, and optionally a thickener. The invention further provides a method for removing rust from rusted metal surfaces by applying the composition, allowing the composition to remain on the rusted metal surface until substantially all of the rust is converted to a water soluble form, and removing the composition from the metal surface by washing with water.

REFERENCES:
patent: 3173864 (1965-03-01), Freedman
patent: 3639278 (1972-02-01), Hwa
patent: 3699047 (1972-10-01), Petrey, Jr.
patent: 3766077 (1973-10-01), Hwa et al.
patent: 4086182 (1978-04-01), Hengelhaupt et al.
patent: 4529450 (1985-07-01), Panayappan
patent: 4595517 (1986-06-01), Abadi
Chemical Abstracts, CA 108(8):57754b.

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