Title: Corrosion resistance and surface biocompatibility of diamond-like carbon coating on AZ31D magnesium alloy

Authors: Yan Lin Wei; Lin Lin Huang; Li Jun Han; Ya Shao Chen

Addresses: Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China; Research Institute of Shaanxi Yanchang Petroleum (Group) Co., Ltd, Xi'an 710075, China ' Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China ' Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China ' Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China

Abstract: To improve corrosion resistance and blood compatibility of Mg alloy for intravascular stent application, nanostructured diamond-like carbon (DLC) coating was prepared onto the surface of Mg alloy substrates using radio-frequency plasma assisted chemical vapour deposition. The surface chemical composition, wettability and anti-corrosion property were also examined. The results show that the coating consists of sp²/sp³ hybrid non-crystalline carbon nano-particles with the size of about 50 nm which form uniform, dense and super-hydrophobic cover. In simulated body fluid solution, the Mg/DLC exhibits a good property of anti-corrosion. Moreover, platelets in vitro assays demonstrate that the Mg/DLC can significantly inhibit the platelet adhesion, thus indicating it has excellent blood compatibility.

Keywords: surface biocompatibility; diamond-like carbon coating; magnesium alloys; DLC coatings; surface modification; corrosion resistance; blood compatibility; intravascular stents; nanostructures; nanotechnology; chemical composition; wettability; nanoparticles; simulation; platelets; platelet adhesion; bioengineering.

DOI: 10.1504/IJSURFSE.2016.076508

International Journal of Surface Science and Engineering, 2016 Vol.10 No.2, pp.101 - 115

Received: 16 Apr 2014
Accepted: 12 Dec 2014
Published online: 11 May 2016 *

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