Enhanced cleaning procedure for copper alloy equipment

Details Enhanced cleaning procedure for copper alloy equipment Enhanced cleaning procedure for copper alloy equipment

1988-11-09

1989-08-29

Pal, Asok

Cleaning and liquid contact with solids

Processes

Using sequentially applied treating agents

134 2, 134 3, 134 28, 134 29, 124 41, B08B 300

Patent

active

048613860

ABSTRACT:
There is disclosed a method and additive to be employed in said method whereby the fouling of metal surfaces with copper deposits resulting from acid cleaning of copper alloy surfaces, be they all of the same metallurgy or merely elements with in the overall system is markedly reduced by adding to the rinse or flush formulations commonly employed following an acid treatment, a chelating agent for copper, and, subsequently adding a copper corrosion inhibitor to the conventional neutralization fluid.

REFERENCES:
patent: 3072502 (1963-01-01), Alfamo
patent: 3447965 (1969-06-01), Teumae
patent: 3460989 (1969-08-01), Rusch
patent: 3887481 (1975-06-01), Korpics
patent: 4184991 (1980-01-01), Scheurman, III
patent: 4666528 (1987-05-01), Aerington et al.
Cotton et al., "British Corrosian J.", vol. 2, pp. 1-5 (1967).

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