Method for the protection of concrete in sea water

• US 4,258,090 A
• Filed: 01/19/1979
• Issued: 03/24/1981
• Est. Priority Date: 01/19/1979
• Status: Expired due to Term

• Current Assignee: Institutul de Cercetari In Constructii SI Economia Constructiilor
• Original Assignee: Institutul de Cercetari In Constructii SI Economia Constructiilor
• Inventors: Moraru, Dino S.
• Primary Examiner(s): Kendall, Ralph S.
• Assistant Examiner(s): Page, Thurman K.
• Application Number:
  US06/005,038
• Time in Patent Office: 795 Days
• Field of Search: 427/385 C, 427/386, 427/302, 427/393.6, 427/407.1, 427/419, 106/15.05, 422/6, 114/65 A, 114/67 R, 114/67 A, 428/907, 264/DIG. 80, 260/22 R, 260/22 A, 260/22 XA, 260/29.2 EP, 260/45.7 SW, 260/45.7 RL
• US Class Current: 427/386
• CPC Class Codes: C04B 28/02 containing hydraulic cements other than calcium sulfates
• CPC Class Codes: C04B 41/009 characterised by the material treated
• CPC Class Codes: C04B 41/46 with organic materials
• CPC Class Codes: C04B 41/48 Macromolecular compounds
• CPC Class Codes: C04B 41/5018 with fluorine compounds
• CPC Class Codes: C04B 41/52 Multiple coating or impregnating multiple coating or impregnating with the same composition or with compositions only differing in the concentration of the constituents, is classified as single coating or impregnation
• CPC Class Codes: C04B 41/70 for obtaining at least two superposed coatings having different compositions
• CPC Class Codes: Y10S 428/907 Resistant against plant or animal attack

Abstract

A new method is disclosed for treating a concrete surface to be used in cact with sea water to prevent fouling of the surface, which comprises the steps of: (a) fluating the concrete surface with an aqueous solution of a compound selected from the group consisting of fluorosilicic acid, calcium fluorosilicate, magnesium fluorosilicate, and zinc fluorosilicate of sufficient concentration to strengthen the concrete surface and to prevent biodeterioration thereof; (b) treating the concrete surface with a biocide insoluble in water and selected from the group consisting of copper naphthenate, beta-naphthol, pentachlorophenol and tributyl-tin oxide to prevent biodeterioration of the concrete surface; and (c) fixing the concrete surface treated during steps (a) and (b) by treating the surface with the biocide defined in step (b) in solution with a polyesteric resin or an epoxy resin.

Claims

1. A method of treating a concrete surface to be used in contact with sea water to prevent fouling of said surface which comprises the steps of:

(a) fluating the concrete surface with an aqueous solution of a compound selected from the group consisting of fluorosilicic acid calcium fluorosilicate, magnesium fluorosilicate, and zinc fluorosilicate of sufficient concentration to strengthen the concrete surface and to prevent biodeterioration thereof;

(b) treating the concrete surface with a biocide insoluble in water and selected from the group consisting of copper naphthenate, beta-naphthol, pentachlorophenol and tributyl tin oxide to prevent biodeterioration of the concrete surface; and

(c) fixing the concrete surface treated during steps (a) and (b) by treating the surface with the biocide defined in step (b) in solution with a polyesteric resin or an epoxy resin.

2. The method defined in claim 1, step (a) wherein the aqueous solution is a 3 to 5% solution by weight of the compound.

3. The method defined in claim 1, step (a) wherein the fluating treatment entails the application of one or two coats of the compound.

4. The method defined in claim 1, steps (a), (b) or (c) wherein the treatment of the concrete surface is carried out by spraying or painting.

5. The method defined in claim 1, step (b), wherein the treatment of the concrete surface with the biocide entails one or two applications.

6. The method defined in claim 1, step (b), wherein the treatment of the concrete with the biocide is carried out with a 45 to 50% by weight solution in an organic solvent.

7. The method defined in claim 1, step (c), wherein the fixing entails one or two treatments with the solution.

8. The method defined in claim 1 wherein step (a) is carried out prior to step (b).

9. The method defined in claim 1 wherein step (b) is carried out prior to step (a).

10. The method defined in claim 9 wherein step (b) is commenced about 24 hours after step (a) is completed.

11. The method defined in claim 10 wherein step (b) entails two treatments and wherein the second treatment is applied at least 30 minutes after finishing the first treatment.