title: [Measurement of low corrosion rate of coronary stents-made of 316L and 317L stainless steel].
abstract: Electrochemical constant current linear polarization and atomic absorption spectroscopy were used to measure the corrosion rate of coronary stents made of 316L and 317L stainless steel in 30 degrees C Tyrode's solution. The results indicated that the corrosion rate of 316L and 317L stainless steel was 21 X 10(-3) microm/a, 9.8 X 10(-3) microm/a and 0.8 X 10(-3) m/a, 0.6 X 10(-3) microm/a, respectively. All corrosion rates were lower than the medical materials corrosion rate criteria, i.e. 0.25 microm/a. Moreover the corrosion resistance of 317L stainless steel was much higher than that of 316L stainless steel. The results from atomic absorption spectroscopy may correctly reflect the quantity of releasing metal ions in the solution.
authors.affiliation: College of Electromechanics & Materials Engineering, Dalian Maritime University, Dalian 116026, China.
authors.forename: Chenghao
authors.initials: C
authors.lastname: Liang
authors.forename: Liang
authors.initials: L
authors.lastname: Guo
authors.forename: Wan
authors.initials: W
authors.lastname: Chen
mesh_terms: D001672:Biocompatible Materials / Q000737:chemistry*; D003343:Corrosion; D008422:Materials Testing; D013054:Spectrophotometry, Atomic; D013193:Stainless Steel / Q000737:chemistry*; D015607:Stents; D013499:Surface Properties
chemical_list: D001672:Biocompatible Materials; D013193:Stainless Steel