The Electrochemical Behavior of the Rehealing Oxide Scales After Pitting Corrosion

Abstract:

The electrochemical behaviour of the rehealing oxide scales on the K52 nanocrystalline coatings had been studied by polarization curves. The results indicated that the oxide scales formed on the nano-coating exhibited rehealing ability after pitting corrosion, and the coating still had excellent corrosion resistance. The rehealing ability was enhanced with prolonged re-oxidation time. EDX analyses revealed that the oxide scales within the pits were composed of mixed-oxides (Cr2O3, Al2O3 and TiO2). The mixed-oxides were made up of two layers: the external oxide layer was composed of Cr2O3 and TiO2 and the internal oxide layer was Al2O3.

• Periodical: Advanced Materials Research (Volumes 476-478)
• Pages: 1399-1402
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.476-478.1399
• Online since: February 2012
• Authors: Hui Ping Bai, Fu Hui Wang, Yuan Qiang Tu
• Keywords: Electrochemical Behaviour, Nanocrystalline Coating, Pitting Corrosion, Rehealing

References

[1] Wang F H: Oxid. Met., Vol 48 (1997), P.215.

[2] Lou H. Y., Wang F.H., Zhu S. L., Xia B., Zhang L.: Surf. Coat Tech., Vol 63 (1994), P.105.

[3] Xiujuan Tian: Chinese Journal of Corrosion and protection, Vol 29, No.3 (2008), P.125.

[4] Huiping Bai, Fuhui Wang: Journal of Materials Science and Technology, Vol 23, No.4 (2007), P.541.

[5] Huiping Bai, Fuhui Wang: Chinese Journal of Materials Research, Vol 22, No.2 (2007), P.147.

[6] Huiping Bai, Fuhui Wang: Chinese Journal of Corrosion Science and protection technology, Vol 20, No.6 (2008), P.400.

[7] Hanyi Lou, Shenlong Zhu and Fuhui Wang: Chinese Journal of Corrosion Science and protection technology, Vol 5, No.3 (1993), P.203.

[8] Hanyi Lou, Shenlong Zhu and Fuhui Wang: Oxid. Met., Vol 43 (1995), P.317.