Role of Sn on the Adhesion between Cu-Sn Alloy Coated Steel and SBR Based Rubber

Abstract:

The effect of Cu-Sn coating on steel towards improving the adhesion between steel and typical styrene butadiene rubber (SBR) based tyre bead composition has been investigated in this work. Steel coupons were coated with varying compositions of Cu-Sn via immersion coating, where the electrolyte bath composition was varied. Chemical analysis of the coatings using ICP-OES confirmed increase in Sn content with increasing SnSO₄ concentration in the coating baths, keeping other parameters constant. No change in the coating weight was observed with change in Sn concentration in the coatings. Bare spots on the coating surface was observed under SEM XPS analysis confirmed formation of Fe oxide at the bare locations. The coated steel plates were vulcanized with SBR based rubber and peel strength was measured. The results confirmed an optimum Sn concentration of 3 - 4 wt% in the coatings up to which an increase (~ 25%) in adhesion strength was exhibited compared to only Cu coatings. Stereo-microscopic analysis of the peel tested samples validated mixed mode i.e. both adhesive and cohesive modes of failure.

• Periodical: Materials Science Forum (Volumes 783-786)
• Pages: 1438-1443
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.783-786.1438
• Online since: May 2014
• Authors: Atanu Banerjee*, Monojit Dutta, Anil K. Bhowmick, Tapas Laha
• Keywords: Bead Rubber, Cu-Sn Coating, Peel Strength, Steel Substrate, Vulcanization

References

[1] D.A. Stout and J. Rife, Surface analysis of the adhesive bond between various Cu, Sn, and Fe bronze alloys and rubber, J. Vac. Sci. & Tech. A, 8 (1990), 2407-2412.

DOI: 10.1116/1.576706

[2] J.W. Cook, S. Edge and D.E. Packham, Bonding of Natural Rubber to Steel: Surface Roughness and Interlayer Structure, J. Adhesion, 72 (2000), 293-315.

DOI: 10.1080/00218460008029287

[3] R.A. Friend, US Patent 4226918. (1980).

[4] R.M. Shemenski, D.K. Kim and T.W. Starinshak, US Patent US4446198 (1984).

[5] G. Haemers, US Patent 4347290 (1982).

[6] S. Nakagawa, K. Kawasaki and M. Yoshikawa, US Patent JP1177390A (1989).

[7] S. Hachisuka, US Patent 5389163 (1995).

[8] S. Nakagawa, K. Kawasaki and M. Yoshikawa, US Patent JP1177390 (1989).

[9] M. Ouchi, US Patent JP3008880 (1991).

[10] J. Hwang and M. Lee, US Patent KR9401347 (1994).

[11] H. Hiroshi and M. Shinichi, US Patent 5176957 (Nov 1990).

[12] P.L. Cho, G.S. Jeon, S.K. Ryu and G. Seo, Adhesion Between Rubber Compound and Copper-Film-Plated Steel Cord, J. Adhesion, 70 (1999), 241-258.

DOI: 10.1080/00218469908009558

[13] P.L. Cho, G. Seo, G. S. Jeon, S. K. Ryu, Adhesion Between Rubber Compounds and Copper-film-coated Steel Plates, J. Adhesion, 73 (2000), 43-63.

DOI: 10.1080/00218460008029296

[14] H.K. Ping, S.W. Bao, W.J. Kui, L. Qin and F.J. Li, Metal Finishing, 1997, 54.

[15] T. Fujii T, F.M.F. De Groot, G.A. Sawatzky, In situ XPS analysis of various iron oxide films grown by NO2-assisted molecular-beam epitaxy, Phy. Rev. B 59 (1999) 3195 – 3202.

DOI: 10.1103/physrevb.59.3195

[16] M. Aronniemi, J. Lahtinen, J. Sainio, XPS study on the correlation between chemical state and oxygen-sensing properties of an iron oxide thin film, App. Surface Sci. 253 (2007) 9476-9482.

DOI: 10.1016/j.apsusc.2007.06.007