Corrosion resistance and surface biocompatibility of diamond-like carbon coating on AZ31D magnesium alloy
by Yan Lin Wei; Lin Lin Huang; Li Jun Han; Ya Shao Chen
International Journal of Surface Science and Engineering (IJSURFSE), Vol. 10, No. 2, 2016

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.

Online publication date: Wed, 11-May-2016

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