Composite stearate-containing coatings to control the resorption rate of biomedical items made of magnesium alloy MA8

Authors

  • Andrey S. Gnedenkov Institute of Chemistry, FEB RAS, Vladivostok, Russia
  • Valeriya S. Filonina Institute of Chemistry, FEB RAS, Vladivostok, Russia
  • Sergey L. Sinebryukhov Institute of Chemistry, FEB RAS, Vladivostok, Russia
  • Sergey V. Gnedenkov Institute of Chemistry, FEB RAS, Vladivostok, Russia

Keywords:

magnesium, magnesium alloys, protective coatings, plasma electrolytic oxidation, corrosion protection

Abstract

The paper presents a method for the formation of hybrid inhibitor- and polymer-containing biocompatible coatings based on the oxide layer obtained by plasma electrolytic oxidation (PEO) on the surface of a resorbable magnesium alloy MA8. During the study it was revealed that impregnation of the pores of a PEO coating with corrosion inhibitor and polymer has a positive effect of on material`s protective properties. It was established that among presented surface layers, the best corrosion resistance is demonstrated by samples coated with HC-2SP (a hybrid coating obtained in two stages as a result of successive treatment of the PEO layer with an inhibitor and a polymer). It is characterized by the lowest value of corrosion current density (1.7ˑ10–8 A/cm2 after 1 h of exposure to 0.9% NaCl solution and 1.3ˑ10–7 A/cm2 after 24 h) and the highest value of polarization resistance (2.6ˑ106 Ω‧cm2 after 1 h of exposure and 1.6ˑ105 Ω‧cm2 after 24 hours).

Author Biographies

Andrey S. Gnedenkov, Institute of Chemistry, FEB RAS, Vladivostok, Russia

Professor of RAS, Doctor of Sciences in Chemistry, Leading Researcher

http://orcid.org/0000-0002-9822-7849

Valeriya S. Filonina, Institute of Chemistry, FEB RAS, Vladivostok, Russia

Junior Researcher

http://orcid.org/0000-0002-9544-3597

Sergey L. Sinebryukhov, Institute of Chemistry, FEB RAS, Vladivostok, Russia

Corresponding Member of RAS, Doctor of Sciences in Chemistry, Deputy Director

http://orcid.org/0000-0002-0963-0557

Sergey V. Gnedenkov, Institute of Chemistry, FEB RAS, Vladivostok, Russia

Corresponding Member of RAS, Doctor of Sciences in Chemistry, Director

http://orcid.org/0000-0003-1576-8680

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Published

2022-12-07

How to Cite

Gnedenkov А. С. ., Filonina В. С., Sinebryukhov С. Л., & Gnedenkov С. В. (2022). Composite stearate-containing coatings to control the resorption rate of biomedical items made of magnesium alloy MA8. Vestnik of the Far East Branch of the Russian Academy of Sciences, (6), 46–56. Retrieved from http://vestnikdvo.ru/index.php/vestnikdvo/article/view/1020

Issue

No. 6 (2022)

Section

Physicochemistry of surface and nanosized systems