Applied Composite Materials

, Volume 17, Issue 4, pp 363–372 | Cite as

Natural Weathering and Sea Water Effects on the Durability of Glass Fiber Reinforced Vinylester: Fractographic Analysis

  • Nesar MerahEmail author
  • Seyed Nizamuddin
  • Zafarullah Khan
  • Faleh Al-Sulaiman
  • Moeid Mehdi


This paper presents a study of the effects of harsh outdoor weather and warm sea water on the tensile behavior of Glass-Fiber Reinforced Vinylester (GFRV) pipe materials destined for sea water handling and transportation. The effect of Dhahran’s outdoor weather for exposure periods ranging from 3 to 36 months revealed an improvement in tensile strength when compared with the as received GFRV sample. A significant increasing trend of tensile strength from 3 to 12 months was noted. This is attributed mainly to the post curing effects resulting in higher cross linking density. After 12 months of exposure the tensile strength showed a decreasing trend, but remaining still higher than the average tensile strength of as received (baseline) GFRV sample. Similar results of enhanced tensile strength were noted after immersion of GFRV pipes in warm Gulf sea water for 12 months. Fractographic analysis was performed on the tensile tested GFRV samples using optical microscope followed by scanning electron microscope (SEM). The characterization of the controlling failure mechanisms involved from fracture initiation to fracture propagation through the gage section of the specimen were predicted and were justified by correlating the optical and SEM pictures.


Durability Environment Curing Tensile GFRV 



The authors thankfully acknowledge King Fahd University of Petroleum & Minerals and Saudi Aramco for supporting this research.


  1. 1.
    Rodriguez, F.: Principles of polymer systems. Taylor & Francis, New York (1996)Google Scholar
  2. 2.
    Allcock, H.R., Lampe, F.W.: Contemporary polymer chemistry. Prentice Hall, New Jersey (1990)Google Scholar
  3. 3.
    Ruaya, A., Shaw, M.T., Garton, A.: Oxidation of elastomers in aqueous environments. Rubber Chem. Technol. 67, 775–785 (1994)Google Scholar
  4. 4.
    Chin, J.W., Nguyen, T., Aouadi, K.: Sorption and diffusion of water, salt water, and concrete pore solution in composite matrices. J. Appl. Polym. Sci. 71, 483–492 (1999)CrossRefGoogle Scholar
  5. 5.
    Wu, L., Murphy, K., Karbhari, V.M., Zhang, J.S.: Short-term effects of sea water on E-Glass/Vinyl ester composites. J. Appl. Polym. Sci. 84, 2760–2767 (2002)CrossRefGoogle Scholar
  6. 6.
    Karbhari, V.M.: E-Glass/Vinylester composites in aqueous environments: effects on short-beam shear strength. J. Compos. Constr 8(2), 148–156 (2004)CrossRefGoogle Scholar
  7. 7.
    Itaru, N., Seishi, M.: Long-term deterioration of GFRP in water and moist environment. J. Compos. Constr 6(1), 21–27 (2002)CrossRefGoogle Scholar
  8. 8.
    Helbling, C., Karbhari, V.M.: SP-230-79: durability assessment of combined environmental exposure and bending. ACI Spec. Pub. 2(230), 1397–1418 (2005)Google Scholar
  9. 9.
    Nizamuddin, S., Merah, N., Khan, Al-Sulaiman, F., Mehdi, M.: Sea water and temperature effects on tensile and stress rupture strengths of glass fiber reinforced vinylester and epoxy pipes. 3rd International Conference on: Applications of Traditional and High Performance Materials in Harsh Environments, AUS UAE, Jan. (2008)Google Scholar
  10. 10.
    Rivera, J., Karbhari, V.M.: Cold-temperature and simultaneous aqueous environment related degradation of carbon/vinyl ester composites. Compos. Part B 33, 17–24 (2002)CrossRefGoogle Scholar
  11. 11.
    Benmokrane, B., Wang, P., Ton-That, T.M., Rahman, H., Robert, J.F.: Durability of glass fiber-reinforced polymer reinforcing bars in concrete environment. J. Compos. Constr. 6, 143–153 (2002)CrossRefGoogle Scholar
  12. 12.
    Farshad, M., Necola, A.: Test method effect of aqueous environment on the long-term behavior of glass fiber-reinforced plastic pipes. Polym. Test. 23, 163–167 (2004)CrossRefGoogle Scholar
  13. 13.
    Khan, Z., Merah, N., Al-Sulaiman, F, Mezghani, K.: The effect of environmental conditions on the performance of vinyl ester and epoxy based glass fiber reinforced thermoset pipes. Fifth Progress Report, ME 2236, KFUPM, (2007)Google Scholar
  14. 14.
    ASTM D 2290. Standard test method for apparent hoop tensile strength of plastic or reinforced plastic pipe by split disk method. Annual Book of ASTM Standards, 08 June 10 (2000)Google Scholar
  15. 15.
    Gerson, M., De Andrade, A.H.P.: Microstructural analysis in asymmetric and un-balanced composite cylinders damaged by internal pressure. Compos. Struct. 72, 86–90 (2006)CrossRefGoogle Scholar
  16. 16.
    Cevdet, K., Salim, E.E., Levend, P., Fikret, S.: Use of split-disk tests for the process parameters of filament wound epoxy composite tubes. Polym. Test. 24, 648–655 (2005)CrossRefGoogle Scholar
  17. 17.
    Hibbs, M.F., Bradley, W.L.: Correlation between micro-mechanical failure processes and the delamination toughness of Graphite/Epoxy systems. In: Masters, J.E., Au, J.J. (eds.) Fractography of modern engineering materials: composites and metals, ASTM STP 948, pp. 68–97. American society for testing and materials, Philadelphia (1987)CrossRefGoogle Scholar
  18. 18.
    Hammami, A., Al-Ghuilani, N.: Durability of environmental degradation of glass-vinyl ester composites. Polym. Compos. 25(6), 609–616 (2004)CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  • Nesar Merah
    • 1
    Email author
  • Seyed Nizamuddin
    • 1
  • Zafarullah Khan
    • 1
  • Faleh Al-Sulaiman
    • 1
  • Moeid Mehdi
    • 2
  1. 1.Mechanical Engineering DepartmentKing Fahd University of Petroleum and MineralsDhahranSaudi Arabia
  2. 2.CSD, Saudi AramcoDhahranSaudi Arabia

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