The Immersion Corrosion Resistance of Shot Peening and MAO Applied on AZ31−0.5% La Sheets
In this study, the effect of Shot Peening (SP) and Micro Arc Oxidation (MAO) process on the corrosion resistance of 0.5% La with added AZ31 Mg alloy, hot rolled at different rolling speeds, was investigated. It was found that the surface of the rolled material at a rolling speed of 4.7m/min had higher surface smoothness values than the one rolled at 10m/min. It was observed that the corrosion rate changed in the first 40 of 168 hours. In the following hours, the corrosion rate showed different results according to the initial microstructure properties of the base materials. Initially, pore size was the dominant factor determining corrosion resistance, although, after coating, the corrosion rate was affected by the twins formed, based on rolling speed, which enhanced the corrosion rate between 48 and 168 hours.
Keywords:shot peening, micro arc oxidation, AZ31, La, hot rolling, corrosion resistance
X. Liu, B. W. Zhu, C. Xie, J. Zhang, C. P. Tang, Y. Q. Chen, “Twinning, dynamic recrystallization, and crack in AZ31 magnesium alloy during high strain rate plane strain compression across a wide temperature”, Materials Science and Engineering: A, Vol. 733, pp. 98-107, 2018 DOI: https://doi.org/10.1016/j.msea.2018.07.030
J. B. Zhang, L. B. Tong, C. Xu, Z. H. Jiang, L. R. Cheng, S. Kamado, H. J. Zhang, “Influence of Ca-Ce/La synergistic alloying on the microstructure and mechanical properties of extruded Mg–Zn alloy”, Materials Science and Engineering: A, Vol. 708, pp. 11-20, 2017 DOI: https://doi.org/10.1016/j.msea.2017.09.113
I. H. Kara, H. Ahlatci, Y. Turen, Y. Sun, “Microstructure and corrosion properties of lanthanum-added AZ31 Mg alloys”, Arabian Journal of Geosciences, Vol. 11, No. 18, Article ID 535, 2018 DOI: https://doi.org/10.1007/s12517-018-3871-1
D. Sreekanth, N. Rameshbabu, K. Venkateswarlu, “Effect of various additives on morphology and corrosion behavior of ceramic coatings developed on AZ31 magnesium alloy by plasma electrolytic oxidation”, Ceramics International,Vol. 38, No. 6, pp. 4607-4615, 2012 DOI: https://doi.org/10.1016/j.ceramint.2012.02.040
Y. Du, M. Zheng, X. Qiao, W. Peng, B. Jiang, “Effect of La addition on the microstructure and mechanical properties of Mg–6 wt% Zn alloys”, Materials Science and Engineering: A, Vol. 673, pp. 47-54, 2016 DOI: https://doi.org/10.1016/j.msea.2016.07.022
M. Mhaede, F. Pastore, B. Hadzima, “Influence of shot peening on corrosion properties of biocompatible magnesium alloy AZ31 coated by dicalcium phosphate dihydrate (DCPD)”, Materials Science and Engineering: C,Vol. 39, pp. 330-335, 2014 DOI: https://doi.org/10.1016/j.msec.2014.03.023
V. Ezhilselvi, J. Nithin, J. N. Balaraju, S. Subramanian, “The influence of current density on the morphology and corrosion properties of MAO coatings on AZ31B magnesium alloy”, Surface and Coatings Technology, Vol. 288, pp. 221-229, 2016 DOI: https://doi.org/10.1016/j.surfcoat.2016.01.040
A. Keyvani, M. Zamani, A. Fattah-Alhosseini, S. H. Nourbakhsh, M. Bahamirian, “Microstructure and corrosion resistance of MAO coatings on AZ31 magnesium”, Materials Research Express, Vol. 5, Article ID 086510, 2018 DOI: https://doi.org/10.1088/2053-1591/aad0d4
K. Dong, Y. Song, D. Shan, E. H. Han, “Corrosion behavior of a self-sealing pore micro-arc oxidation film on AM60 magnesium alloy”, Corrosion Science,Vol. 100, pp. 275–283, 2015 DOI: https://doi.org/10.1016/j.corsci.2015.08.004
F. Guo, D. Zhang, X. Yang, L. Jiang, S. Chai, F. Pan, “Influence of rolling speed on microstructure and mechanical properties of AZ31 Mg alloy rolled by large strain hot rolling”, Materials Science and Engineering: A,Vol. 607, pp. 383-389, 2014 DOI: https://doi.org/10.1016/j.msea.2014.04.024
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