Electrolytic polishing process of intravascular nitinol stents

The incidence of peripheral arterial disease (PAD) is steadily rising in China due to the aging population, and the number of PADs requiring intervention is increasing. Minimally invasive treatment is an effective method to treat PAD, and nitinol alloy vascular stent has become an effective and safe minimally invasive treatment method. Nitinol stent has a favorable shape memory effect, super elasticity, and biocompatibility. Stents need to have good corrosion resistance and biocompatibility in blood vessels, so the surface treatment of stents is particularly critical. This research mainly studies the effect of electrolytic polishing technology on the surface of nitinol alloy stents. The specific research results are as follows: when the polishing time is 60 S and the polishing current is 2 A-2.5 A, the surface of the stent is brighter and the surface roughness of the stent is lower. Using a pulse power supply as the polishing power supply, when the duty cycle is 50%, the surface of the stent is better and the surface roughness is lower.