Pipe wrap for preventing microbiologically influenced corrosion in buried conduits
First Claim
1. An apparatus for carrying fluids, comprising:
- a conduit comprising a material selected from the group consisting of metal, and concrete with metal reinforcements;
a polyolefin film comprising an anti-corrosive film layer in abutment with a surface of said conduit, said anti-corrosive film layer having an antimicrobial additive incorporated into and dispersed throughout said anti-corrosive film layer for killing corrosion-inducing bacteria on the surface of said conduit, said antimicrobial additive being selected from the group consisting of bromonitropropanediol, 2,4,4′
-trichloro-2′
-hydroxy diphenyl ether, and diiodomethyl-p-tolyl sulfone.
3 Assignments
0 Petitions
Accused Products
Abstract
An improved anti-corrosive material used to protect buried conduits from corrosion. The anti-corrosive material is comprised of a conduit contacting layer of polyolefin having the anti-corrosive agents impregnated therein. The preferred embodiment of the material is a multi-layered co-extruded, calendered, or laminated polyolefin. The material has an outer layer, or environment contacting layer, preferably comprised of a low density polyethylene having characteristically strong tensile strength and elongation properties to provide conventional protection from soil, water, air, or other potentially damaging elements. The material has a center layer preferably comprised of a high density polyethylene having superior tensile strength to provide a high density barrier between the outer layer and an inner layer. The inner layer, or conduit contacting layer, is preferably comprised of a low density polyethylene impregnated with one or more antimicrobial additives. The antimicrobial additives are incorporated into and dispersed throughout the conduit contacting layer for killing corrosion-inducing bacteria on the surface of the conduit. The antimicrobial additives are able to migrate through the low density polymer matrix but the rate of migration of the biocide is considerably slowed through the high density polymer. Thus, the antimicrobial agents are substantially prevented from escaping into the surrounding environment, but rather, are trapped within a “protection zone” immediately adjacent the conduit surface to provide extended protection against corrosion.
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Citations
7 Claims
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1. An apparatus for carrying fluids, comprising:
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a conduit comprising a material selected from the group consisting of metal, and concrete with metal reinforcements;
a polyolefin film comprising an anti-corrosive film layer in abutment with a surface of said conduit, said anti-corrosive film layer having an antimicrobial additive incorporated into and dispersed throughout said anti-corrosive film layer for killing corrosion-inducing bacteria on the surface of said conduit, said antimicrobial additive being selected from the group consisting of bromonitropropanediol, 2,4,4′
-trichloro-2′
-hydroxy diphenyl ether, and diiodomethyl-p-tolyl sulfone.- View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification