Synergistic combination of sodium silicate and orthophosphate fo

Details Synergistic combination of sodium silicate and orthophosphate fo Synergistic combination of sodium silicate and orthophosphate fo

Filed on

1991-04-24

Date issued

1992-08-11

Examiner

Kyle, Deborah L.

Patent Class

Compositions

SubClass

Preservative agents

SubSubClass

Anti-corrosion

Other Related Categories

210694, 422 18, C23F 1118

Type

Patent

Status

active

Patent number

051376571

Description

ABSTRACT:
An orthophosphate salt and sodium silicate, when used in a 3:1 ratio by weight, and in a concentration of 0.1 to 100 mg/L, are found to have a synergistic effect in controlling the corrosion of carbon steel in an aqueous system, e.g., a municipal water supply system. The synergistic combination is also useful in reducing lead solubility and leaching, and in stabilizing soluble iron and manganese and their reaction products.

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