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Evaluation of Degradation of a Fiberglass Pipe Exposed to Two Industrial Fluids

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FRP pipe made of spiral-wound high strength glass fiber filaments and an aromatic amine-cured epoxy resin. Two 90-day exposure tests. Water penetration in the FRP was measured in terms of weight and volume gain as a function of exposure time.

Product Number: 51317--8985-SG
ISBN: 8985 2017 CP
Author: Jie He
Publication Date: 2017
Industry: Materials Selection and Design
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Evaluation of Degradation of a Fiberglass Pipe Exposed to Two Industrial FluidsFiber-reinforced plastics (FRP) composites are widely used in various civil engineering and aerospace applications. They exhibit superior mechanical properties than their metallic counterparts. However they are susceptible to damage and degradation especially in harsh industrial environments.Recently degradation of a Fiber-reinforced plastic (FRP) pipe was evaluated in two air-saturated industrial fluids at 140°F. The FRP pipe which is considered utilization in underground disposal facilities was made of a high strength glass fiber filaments and an aromatic amine-cured epoxy resin through a filament winding approach. During the two 90-day exposure tests the water penetration in the FRP was measured in terms of weight and volume gain as a function of exposure time. The dynamic of water penetration into the FRP was also investigated and based on experimental results the service life of the FRP exposed to the two industrial fluids was estimated.Subsequent to the 90-day exposure tests the FRPs were cross-sectioned and the concentration profile of ions of aggressive species in the fluids including sulfur phosphorous and chlorine were mapped by scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDX) from outer surface to the internal glass fiber matrix. The dynamics and distribution of various aggressive ion species in the FRP have also been detailedKeywords: fiber reinforce plastic FRP polymer degradation service life estimation SEM-EDX analysis depth-profile analysis.

Key words: Fiber reinforced plastic, FRP, water absorption, SEM-EDS

Evaluation of Degradation of a Fiberglass Pipe Exposed to Two Industrial FluidsFiber-reinforced plastics (FRP) composites are widely used in various civil engineering and aerospace applications. They exhibit superior mechanical properties than their metallic counterparts. However they are susceptible to damage and degradation especially in harsh industrial environments.Recently degradation of a Fiber-reinforced plastic (FRP) pipe was evaluated in two air-saturated industrial fluids at 140°F. The FRP pipe which is considered utilization in underground disposal facilities was made of a high strength glass fiber filaments and an aromatic amine-cured epoxy resin through a filament winding approach. During the two 90-day exposure tests the water penetration in the FRP was measured in terms of weight and volume gain as a function of exposure time. The dynamic of water penetration into the FRP was also investigated and based on experimental results the service life of the FRP exposed to the two industrial fluids was estimated.Subsequent to the 90-day exposure tests the FRPs were cross-sectioned and the concentration profile of ions of aggressive species in the fluids including sulfur phosphorous and chlorine were mapped by scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDX) from outer surface to the internal glass fiber matrix. The dynamics and distribution of various aggressive ion species in the FRP have also been detailedKeywords: fiber reinforce plastic FRP polymer degradation service life estimation SEM-EDX analysis depth-profile analysis.

Key words: Fiber reinforced plastic, FRP, water absorption, SEM-EDS

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