investigation the mechanism of the effect of clay nanoparticles on corrosion and wear resistance properties of epoxy nanocomposite coating applied to the surface of the carbon steel substrate

Document Type : Research Paper

Authors

• fatemeh mohebbi
• M Rahsepar

shiraz university, department of material science and engineering

Abstract

In this study, epoxy coatings nanocomposite containing different percentages of nanoclay were prepared. corrosion and wear properties by electrochemical test, salt spray and pin on disk and also scanning electron microscopy analysis was investigated. By observing the results of electrochemical tests and salt spray it was found that by increasing nanoclay to 2% wt and prolong the penetration route corrosive agents, corrosion resistance and ability to protect the coatings are improved. On the other hand, the addition of excessive nano-clay particles to the polymer matrix, agglomeration of the particles and thus lead to a considerable decline in corrosion resistance. Also see the results of the pin on disc test represents the same optimized to improve the wear resistance of polymer coatings containing nanoclay. According to the results, while the addition of nanoclay uo to 2 percents increased hardness and wear resistance,The presence of too much particles due to differences in hardness with the polymer and Agglomeration, causing stress concentration at the intersection points between pin and Aggregate mass of particles And facilitates the separation of the coating and decreases in resistance to abrasion of coating

Keywords

• epoxy coating
• Nanoclay
• Corrosion
• Wear
• electrochemical impedance test

20.1001.1.22285946.1396.7.27.9.1

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References

1- X. Shi and T.A. Nguyen and Z. Suo and Y. Liu and R. Avci, "Effect of nanoparticles on the anticorrosion and mechanical properties of epoxy coating", Surface and Coatings Technology, Vol. 204, pp. 237- 245, 2009. 2-S. Yamini and R. Young, "Stability of crack propagation in epoxy resins", Polymer, Vol. 18, pp. 1075-1080, 1977. 3- D. Perreux and C. Suri, "A study of the coupling between the phenomena of water absorption and damage in glass/epoxy composite pipes", Composites Science and Technology, Vol. 57, pp. 1403-1413, 1997. 4- A.C. Loos and G.S. Springer, "Moisture absorption of graphite-epoxy composites immersed in liquids and in humid air", Journal of Composite Materials, Vol. 13, pp. 131-147, 1979. 5- C.K. Lam and K.T. Lau, "Localized elastic modulus distribution of nanoclay/epoxy composites by using nanoindentation", Composite structures, Vol. 75, pp. 553-558, 2006. 6-G. Shi and M.Q. Zhang and M.Z. Rong and B. Wetzel and K. Friedrich, "Friction and wear of low nanometer Si 3 N 4 filled epoxy composites", Wear, Vol. 254, pp. 784-796, 2003. 7- A. Hartwig and M. Sebald and D. Pütz and L. Aberle, "Preparation, characterisation and properties of nanocomposites based on epoxy resins–An overview", Macromolecular symposia, Vol. 22, pp. 127-136, 2005. 8-F. Dietsche and Y. Thomann and R. Thomann and R. Mülhaupt, "Translucent acrylic nanocomposites containing anisotropic laminated nanoparticles derived from intercalated layered silicates", Journal of applied polymer science, Vol. 75, pp. 396-405, 2000. 9- D.G. Shchukin and M. Zheludkevich and K. Yasakau and S. Lamaka and M.G. Ferreira and H. Möhwald, "Layer‐by‐Layer Assembled Nanocontainers for Self‐Healing Corrosion Protection", Advanced Materials, Vol. 18, pp. 1672-1678, 2006. 10-S. Tambe and R. Naik and S. Singh and M. Patri and D. Kumar, "Studies on effect of nanoclay on the properties of thermally sprayable EVA and EVAI coatings", Progress in Organic Coatings, Vol. 65, pp. 484-489, 2009. 11- M.S. Kim and G.H. Kim and S.R. Chowdhury, "Polybutadiene rubber/organoclay nanocomposites: Effect of organoclay with various modifier concentrations on the vulcanization behavior and mechanical properties", Polymer Engineering & Science, Vol. 47, pp. 308-313, 2007. 12-J.-M. Yeh and H.-Y. Huang and C.-L. Chen and W.-F. Su and Y.-H. Yu, "Siloxane-modified epoxy resin–clay nanocomposite coatings with advanced anticorrosive properties prepared by a solution dispersion approach", Surface and Coatings Technology, Vol. 200, pp. 2753- 2763, 2006. 13-M.D. Tomić and B. Dunjić and V. Likić and J. Bajat and J. Rogan and J. Djonlagić, "The use of nanoclay in preparation of epoxy anticorrosive coatings", Progress in Organic Coatings, Vol. 77, pp. 518-527, 2014.

14- A. Malas and C.K. Das, "Compatibilized ethylene-propylene-diene terpolymer nanocomposites containing different type of organoclays", Polimery, Vol. 58, pp. 204-211, 2013.