Microstructure and Anti-Corrosion Properties of Arc-Sprayed Aluminum Coating in Splash Zone

Article Preview

Abstract:

Aluminum coatings were developed by arc spray on mild carbon steel Q235. Scanning electron microscopy detection shows that the coatings have good bonding with the substrate and have low porosity. The corrosion behaviors of the coatings in splash zone were studied. The results show that free corrosion potentials of aluminum coatings are much lower than that of Q235. Potentiodynamic polarization measurements reveal that the curves of aluminum coatings have activity anodic dissolution zone, passivation zone and super-passivation zone. Corrosion morphology and energy dispersive spectrometers show that Cl- can penetrate into the coatings and some of the substrate has been corroded. The arc spray Al-coating develops a film of corrosion products on the coating surface, which tend to seal the pores in the coatings. Arc spray aluminum coatings can protect the substrate from corrosion in splash zone.

You might also be interested in these eBooks

Info:

Periodical:

Advanced Materials Research (Volumes 199-200)

Pages:

1949-1953

Citation:

Online since:

February 2011

Export:

Price:

Permissions CCC:

Permissions PLS:

Сopyright:

© 2011 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

[1] B. R. Hou: Theory and application of marine corrosion environment. (Science Press, Beijing 1999).

Google Scholar

[2] B. R. Hou, J. Z. Duan, J. L. Zhang, H. Y. Sun and Y. Li: Materials Performance Vol. 41 (2002), p.45.

Google Scholar

[3] M. Smith, C. Bowley and L. Williams: Materials Performance Vol. 41 (2002), p.30.

Google Scholar

[4] K. Tachibana, Y. Morinaga and M. Mayuzumi: Corrosion Science Vol. 49 (2007), p.149.

Google Scholar

[5] E. Celik, I. Ozdemir, E. Avci and Y. Tsunekawa: Surface & Coatings technology Vol. 193 (2005), p.297.

DOI: 10.1016/j.surfcoat.2004.08.143

Google Scholar

[6] A. R. Moreira, Z. Panossian, P. L. Camargo, M. F. Moreira, I. C. da Silva and J. E. R. de Carvalho: Corrosion Science Vol. 48 (2006), p.564.

DOI: 10.1016/j.corsci.2005.02.012

Google Scholar

[7] S. V. Klinkov, V. F. Kosarev, A. A. Sova and I. Smurov: Surface & Coatings technology Vol. 202 (2008), p.5868.

DOI: 10.1016/j.surfcoat.2008.06.171

Google Scholar

[8] Beitelman A, Van B. V. and Kumer A.: Corrosion Vol. 64 (1993), p.439.

Google Scholar