Corrosion Behavior of AZ91 Mg-Alloy Coated with AlN and TiN in NaCl and Hank's Solution

Abstract:

Magnesium alloys create increasing interest in structural application where weight reduction is vast concern. However, its low corrosion resistance especially in atmosphere environment restricts their wide application. In this study, AlN and TiN were coated on AZ91 Mg alloy using PVD magnetron sputtering. AlN and TiN existence is confirmed via grazing angle x-ray diffraction (GA-XRD). The corrosion behaviors of uncoated and coated AZ91 Mg alloy in3.5% NaCl and Hanks solutions were investigated using a potentiostat during electrochemical corrosion test. AlN and TiN coated samples showed better performance in Hanks solution with TiN coated samples have the least corrosion rate (penetration rate=0.040mm/yr and mass loss rate=0.191g/m²d) in Hanks solution. These create interest to further works on exploring the potential of coated AZ91 Mg alloy in biomaterial application.

• Periodical: Advanced Materials Research (Volume 626)
• Pages: 275-279
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.626.275
• Online since: December 2012
• Authors: Zulkifli Mohd Rosli, Zainab B. Mahamud, Jariah Mohd Juoi, Nafarizal Nayan, Kwan Wai Loon, Yusliza Yusuf, Hairul Effendy Ab Maulod
• Keywords: Aluminum Nitride (AlN), AZ91 Mg Alloys, Electrochemical Corrosion Test, PVD Magnetron Sputtering, TiN

References

[1] A. Němcová, J. Zapletal, M. Juliš& T. Podrábský: Materials EngineeringVol. 16 (2009), No. 4.

[2] K.W. Guo, A review of magnesium/magnesium alloys corrosion and its protection, Recent Patent on Corrosion, Vol. 2 (2010), pp.13-21.

DOI: 10.2174/1877610801002010013

[3] B.L. Mordike& T. Ebert, Magnesium Properties — applications — potential, Materials Science and Engineering, vol. A302 (2001), p.37–45.

[4] Li-jingYang, Ying-huiWei , Li-fengHou and DiZhang: Corrosion ScienceVol. 52 (2010), p.345–351.

[5] L. Zhu and G. Song: Surface & Coatings Vol. 200 (2006), p.2834– 2840.

[6] H. Altun and H. Sinichi: Materials Characterization Vol. 58 (2008), pp.266-270.

[7] N.I.Z. Abidin, A. D Atrens, D. Martin and A. Atrems: Corrosion Science Vol. 53 (2011), pp.3542-355.

[8] H. Hoche, C. Blawertand E. Broszeit: Surface Coating TechnologyVol. 193 (2005), pp.223-229.

[9] M-C. Zhao, M. Liu, G-L. Song and A. Atrens: Corrosion ScienceVol. 50 (2008), pp.3168-3178.

[10] L. Chunha, M. Andritschky, L. Reboutaand R. Silva, Corrosion of TiN, (TiAl)N and CrN hard coatings produced by magnetron sputtering.

DOI: 10.1016/s0040-6090(97)00624-x

[11] A. Pardo, M.C. Merino, A.E. Coy , R. Arrabal, F. Viejo and E. Matykina: Corrosion Science Vol. 50 (2008), p.823–834.

DOI: 10.1016/j.corsci.2007.11.005

[12] Y. Xin, C. Liu, K. Huo, G. Tang, X. Tian and P.K. Chu: Surface & Coatings Technology Vol. 203 (2009), pp.2554-2557.

DOI: 10.1016/j.surfcoat.2009.02.074

[13] H. Altun and S. Sen: Surface and Coating Technology Vol. 27 (2006), pp.1174-1179.

[14] C. Rebholz, A. Leyland, A. Matthews, C. Charitidis, S. Logothetidisand D. Schneider: Thin Solid Films Vol. 514 (2006), pp.81-86.

DOI: 10.1016/j.tsf.2006.02.038

[15] H. Altun and S. Sen: Materials Characterization Vol. 58 (2007), pp.917-921.