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COMPOZITES AND MULTIPURPOSE COATING
Название Isolated corrosion of MA8 alloy with inhibitor-containing composite coating on the surface: kinetics, mechanism and protection
DOI 10.17580/tsm.2015.07.09
Автор Sinebryukhov S. L., Gnedenkov A. S., Mashtalyar D. V., Gnedenkov S. V.
Информация об авторе

Institute of Сhemistry of Far Eastern Branch of Russian Academy of Sciences, Vladivostok, Russia:

S. L. Sinebryukhov, Assistant Professor, Head of Laboratory of Non-stationary Surface Processes
A. S. Gnedenkov, Junior Researcher, e-mail: asg17@mail.com
D. V. Mashtalyar, Senior Researcher, Laboratory of Biomedical Composite Coatings
S. V. Gnedenkov, Professor, Deputy Director for Science, Head of Department of Electrochemical Systems and Surface Modification Processes

Реферат

This article offers a method of formation of self-healing coating, which electrochemical properties are detaily described. This coating is obtained on the surface of magnesium alloys, using plasma electrolytic oxidation method and further inhibitor-filling of created layer. Methods of scanning vibration probe and scanning ion-selective electrode (as local scanning electrochemical surface research methods) were used for definition of kinetics and self-healing mechanism, and for investigation of inhibitor ability to suppress the corrosion process during formation of defect, made by scratch-testing method. Obtained data point the significantly bigger dissolution rate of sample with defect in the basic plasma electrolythic oxidation layer, in comparison with the sample with self-healing inhibitor-containing coating on the surface. Processing of plasma electrolytic oxidation coating by corrosion process inhibiting 8-oxyquinoline solution provides the 30-time increasing of coating protection characteristics in the conditions of environmental corrosion attack, and prevents the intensive material damage. Results analysis points the corrosion process of successful deceleration by inhibitor even after a week of alloy exposure in corrosion-active environment. According to this, developed method provides the obtaining of self-healingcapable coating during its exploitation in corrosion-active solution. Self-healing mechanism was researched and described. Environmental corrosion attack is continuously suppressed by 8-oxyquinoline (included into the coating), due to which, corrosion keeps the low rate during the long term of exploitation of composite coating magnesium alloy.

This work was carried out with the support of Russian Scientific fund (No. 14-33-00009) and the Government of Russian Federation (Federal agency of scientific organizations).

Ключевые слова Magnesium alloys, corrosion, inhibitor, self-healing, plasma electrolytic oxidation, protective coatings
Библиографический список

1. Aghion E., Bronfin B. Magnesium alloys development towards the 21st century. Materials Science Forum. 2000. Vol. 350/351. pp. 19–28.
2. Polmear I. J. Light alloys: metallurgy of the light metals. N.-Y. : Halsted Press: J. Wiley & Sons, 1996. 362 p.
3. Song G. Recent progress in corrosion and protection of magnesium alloys. Advanced Engineering Materials. 2005. Vol. 7. pp. 563–586.
4. Makar G. L., Kruger J., Sieradzki K. Stress corrosion cracking of rapidly solidified magnesium-aluminum alloys. Corrosion Science. 1993. Vol. 34 (8). pp. 1311–1331.
5. Song G.-L. Corrosion and protection of magnesium alloys. Beijing: Chemical Industry Press, 2006. 298 p.
6. Gnedenkov S. V., Sinebryukhov S. L., Zavidnaya A. G., Egorkin V. S., Puz A. V., Mashtalyar D. V., Sergienko V. I., Yerokhin A. L., Matthews A. Composite Hydroxyapatite-PTFE Coatings on Mg – Mn – Ce Alloy for Resorbable Implant Applications via a Plasma Electrolytic Oxidation-based Route. Journal of the Taiwan Institute of Chemical Engineers. 2014. Vol. 45 (6). pp. 3104–3109.
7. Bettles C. J., Forwood C. T., StJohn D. et al. AMC-SC1: an elevated temperature magnesium alloy suitable for precision sand casting of powertrain components. Magnesium Technology. Edited by H. Kaplan. San Diego : TMS, 2003. pp. 223–226.
8. Song G.-L., Atrens A. Understanding magnesium corrosion – A framework for improved alloy performance. Advanced Engineering Materials. 2003. Vol. 5 (12). pp. 837–857.
9. Song G., Atrens A. Recent insights into the mechanism of magnesium corrosion and research suggestions. Advanced Engineering Materials. 2007. Vol. 9 (3). pp. 177–183.
10. Shi Z., Song G., Atrens A. Corrosion resistance of anodized single-phase Mg alloys. Surface and Coatings Technology. 2006. Vol. 201. pp. 492–503.
11. Blawert C., Dietzel W., Ghali E., Song G. Anodizing treatments for magnesium alloys and their effect on corrosion resistance in various environments. Advanced Engineering Materials. 2006. Vol. 8 (7). pp. 511–533.
12. Gray J. E., Luan B. Protective coatings on magnesium and its alloys – a critical review. Journal of Alloys and Compounds. 2002. Vol. 336. pp. 88–113.
13. Skar J. I., Albright D. Emerging trends in corrosion protection of Mg diecastings. Magnesium Technology 2002. Edited by Kaplan H. I. S.l. : TMS, 2002. pp. 255–261.
14. Polmear I. Light Alloys: From Traditional Alloys to Nanocrystals. Moscow. : Technosphera, 2008. 464 p.
15. Gnedenkov S. V., Khrisanfova O. A., Sinebryukhov S. L., Puz A. V., Gnedenkov A. S. The Composite protective Coatings on the Nitinol Surface. Materials and Manufacturing processes. 2008. Vol. 23 (8). pp. 26–30.
16. Jönson M., Persson D. The influence of the microstructure on the atmospheric corrosion behavior of magnesium alloys AZ91D and AM50. Corrosion science. 2010. Vol. 52. pp. 1077–1085.
17. Gnedenkov S. V., Sinebryukhov S. L., Sergienko V. I. Multifunctional composite coatings on metals and alloys formed by plasma electrolytic oxidation. Vladivostok : Dalnauka, 2013. 460 p.
18. Cheng M., Yuezhou M., Hao Y. Local arc discharge mechanism and requirements of power supply in micro-arc oxidation of magnesium alloy. Frontiers of Mechanical Engineering in China. 2010. Vol. 5 (1). pp. 98–105.
19. Gnedenkov A. S., Sinebryukhov S. L., Mashtalyar D. V., Gnedenkov S. V. Features of the corrosion processes development at the magnesium alloys surface. Surface and Coatings Technology. 2013. Vol. 225. pp. 112–118.
20. Gnedenkov A. S., Sinebryukhov S. L., Mashtalyar D. V., Gnedenkov S. V. Features of the magnesium alloys corrosion in the chloride-containing media. Solid State Phenomena. 2014. Vol. 213. pp. 143–148.
21. Gnedenkov A. S., Sinebryukhov S. L., Mashtalyar D. V., Gnedenkov S. V. Microscale morphology and properties of the PEO-coating surface. Physics Procedia. 2012. Vol. 23. pp. 98–101.
22. Karavai O. V. Bastos, A. C., Zheludkevich M. L., Taryba M. G., Lamaka S. V., Ferreira M. G. S. Localized electrochemical study of corrosion inhibition in microdefects on coated AZ31 magnesium alloy. Electrochimica Acta. 2010. Vol. 55. pp. 5401–5406.
23. Gnedenkov S. V., Sinebryukhov S. L., Mashtalyar D. V., Egorkin V. S., Sidorova M. V., Gnedenkov A. S. Composite polymer-containing protective coatings on magnesium alloy MA8. Corrosion Science. 2014. Vol. 85. pp. 52–59.

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