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ORIGINAL RESEARCH article
Front. Chem.
Sec. Polymer Chemistry
Volume 13 - 2025 | doi: 10.3389/fchem.2025.1566676
This article is part of the Research Topic Progress in Functional Coatings View all articles
Spray-Synthesized Organic Composite/Hydroxyapatite Coating on Magnesium Alloys with Enhanced Corrosion Resistance
Provisionally accepted- 1 Fujian Jiangxia University, Fuzhou, China
- 2 Minjiang University, Fuzhou, Fujian Province, China
The development and production of anti-corrosive coatings are critical for medical implants, particularly those that utilize composite coatings made from both flexible organic materials and rigid inorganic materials, which exhibit advantageous mechanical properties and resistance to corrosion. In this work, an organic composite/hydroxyapatite coating on magnesium alloys is fabricated through a two-step process, which involves the application of a spray technique for the organic silica composite (PEI/Si), followed by a hydrothermal treatment to deposit hydroxyapatite (HA). The dense and tightly layer-by-layer assembly PEI/Si/HA coating on Mg substrate exhibited a corrosion current density of 10 -5.6 A/cm 2 , significantly lower than that of HA and the Mg substrate. After immersion for 13 days, the PEI/Si/HA coatings demonstrated a minimal amount of H2 generation and negligible fluctuations in pH within the solution. Meantime, the hydrothermal PEI-Si-HA coatings exhibited significantly weaker corrosion resistance compared to the PEI/Si/HA coatings synthesized using the spray method. Both electrochemical dynamic data and structural characteristics demonstrate the enhanced corrosion resistance on organic composite/hydroxyapatite coatings, in which polymer chains provided more volume as a buffer for H2 molecules. This organic composite/hydroxyapatite coating on magnesium alloys exhibited huge potential applications in orthopedics.
Keywords: Spray, Organic composite/hydroxyapatite coating, Corrosion Resistance, Magnesium, Layer-by-layer assembly
Received: 25 Jan 2025; Accepted: 05 Mar 2025.
Copyright: © 2025 Wang, Wei, Hong and Lv. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence:
Jinquan Hong, Minjiang University, Fuzhou, 350108, Fujian Province, China
Jiangquan Lv, Fujian Jiangxia University, Fuzhou, China
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