Seawater Corrosion Resistance and Service Life Prediction of Glass Fiber Reinforced Plastic Composites

doi:10.11902/1005.4537.2015.173

Journal of Chinese Society for Corrosion and protection

2016, Vol. 36

Issue (4): 357-362 DOI: 10.11902/1005.4537.2015.173

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Seawater Corrosion Resistance and Service Life Prediction of Glass Fiber Reinforced Plastic Composites

Yanan NIE¹,Hao SHEN²,Kunpeng GU¹,Chengqi WANG¹(

)

1. CCCC Shanghai Third Harbor Engineering Science & Technology Research Institute Co., Ltd., Shanghai 200032, China
2. Shanghai HongYun New Construction Materials Co., Ltd., Shanghai 201500, China

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Abstract

The anti-corrosion performance of glass fiber reinforced plastic (GFRP) composites was evaluated by immersion test in 3.5% (mass fraction) sea salt solutions at 70 ℃ in terms of the decreasing trend of the pH value of the solution, the mass variation rate, and the bending strength retention rate of GFRP composites with time. While the surface morphology of the fractured surface of the composites, especially the glass fiber/resin interface before and after corrosion was examined by SEM. The concrete sample wrapped with GFRP composites was used to examine the time when Cl^- penetrated through the GFRP layer. And, the life of resistance to Cl^- penetration of 2 mm thick GFRP composites was predicted. Results showed that the life of resistance to Cl^- penetration for the unsaturated ester based GFRP composite was about 30 a; while the epoxy vinyl ester based GFRP composite was about 70 a.

Key words: glass fiber reinforced plastic accelerated aging resistance to Cl- penetration life prediction

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	Yanan NIE
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	Chengqi WANG

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Yanan NIE,Hao SHEN,Kunpeng GU,Chengqi WANG. Seawater Corrosion Resistance and Service Life Prediction of Glass Fiber Reinforced Plastic Composites. Journal of Chinese Society for Corrosion and protection, 2016, 36(4): 357-362.

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https://www.jcscp.org/EN/10.11902/1005.4537.2015.173 OR https://www.jcscp.org/EN/Y2016/V36/I4/357

Fig.1 Effects of accelerated aging time on mass change

Fig.2 Effects of accelerated aging time on retention rate of bending strength

Fig.3 SEM images of fracture surfaces of 189 GFRP before (a) and after aging for 60 d (b) and 150 d (c)

Fig.4 SEM images of fracture surfaces of MFE-2 GFRP before (a) and after aging for 60 d (b) and 150 d (c)

Fig.5 Effect of natural aging time on bending strength of the UP GFRP^[13]

Fig.6 Effect of accelerated aging time on bending strength of the UP GFRP

Table 1 Content of Cl^- permeating from seawater into the concrete at different time (mass fraction / %)

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