Corrosion inhibitor
AssigneeBioQuest
InventorMichael A. Silveri
Life of this patent
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Abstract
The present invention relates to water treatment chemical formulations, and more particularly to chemical formulations used to treat water containing halogens as a sanitizing agent. The water treatment chemical formulations contain cyanuric acid and an alkali metal molybdate or silicate as an anticorrosion agent.
Claims21
A composition for inhibiting pitting corrosion of a ferrous metal in contact with a metal-corrosive aqueous system, wherein the aqueous system comprises a halogen salt, the composition comprising:
- a) cyanuric acid;
- and
- b) at least one water-soluble salt selected from the group consisting of alkali metal molybdate salts, alkali metal silicate salts, and mixtures thereof.
A composition for inhibiting the corrosion of a ferrous metal in contact with a metal-corrosive aqueous system, the composition comprising:
- a) from about 0.02 to about 66 wt. % cyanuric acid;
- b) from about 0.001 to about 13 wt. % sodium molybdate;
- c) from about 0.002 to about 13 wt. % sodium silicate;
- and
- d) from about 30 to about 97 wt. % sodium bromide.
A method for inhibiting the corrosion of a ferrous metal in contact with a metal-corrosive aqueous system, the method comprising the steps of:
- a) adding to the metal corrosive aqueous system from about 50 to about 600 ppm of cyanuric acid;
- and
- b) adding to the metal corrosive aqueous system from about 3 to about 50 ppm of at least one water-soluble salt selected from the group consisting of alkali metal molybdate salts, alkali metal silicate salts, and mixtures thereof.
Dependencies are inferred from the claim text.