Abstract: In this paper, in order to enhance the corrosion-resistance of MgZnMn alloy, plasma polymerization coatings were synthesized by using diethylene glycol dimethyl ether (diglyme) as organic monomer. Two kinds of an ultra-thin, pinhole-free with poly (ethylene oxide)-like (PEO-like) characteristics prepared with two different discharge power. X-ray photoelectron spectroscopy (XPS) and attenuated total internal reflection Fourier transform infrared spectroscopy (ATR-FTIR) results showed that, higher cross-linked structure formed when using high power (HPEO) than low power (LPEO). Electrochemical and in vitro immersion tests showed that two coatings had good anti-corrosion effect, especially the HPEO coating. The HPEO coating adhered well on the MgZnMn stent after the balloon expansion test, and significantly slowed down the degradation rate of the stent in the subsequent in vitro immersion test.
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