Munroe Norman, Pulletikurthi Chandan, Haider Waseem
Applied Research Center, Florida International University, 10555 West Flagler Street, Miami, FL 33174.
J Mater Eng Perform. 2009 Aug 1;18(5-6):765-767. doi: 10.1007/s11665-009-9454-2.
Porous Nitinol (PNT) has found vast applications in the medical industry as interbody fusion devices, synthetic bone grafts, etc. However, the tendency of the PNT to corrode is anticipated to be greater as compared to solid nitinol since there is a larger surface area in contact with body fluids. In such cases, surface preparation is known to play a major role in a material's biocompatibility. In an effort to check the effect of surface treatments on the in vitro corrosion properties of PNT, in this investigation, they were subjected to different surface treatments such as boiling in water, dry heating, and passivation. The localized corrosion resistance of alloys before and after each treatment was evaluated in phosphate buffer saline solution (PBS) using cyclic polarization tests in accordance with ASTM F 2129-08.
多孔镍钛诺（PNT）作为椎间融合装置、合成骨移植材料等在医疗行业有广泛应用。然而，由于与体液接触的表面积更大，预计PNT比实心镍钛诺更容易腐蚀。在这种情况下，已知表面处理在材料的生物相容性中起主要作用。为了研究表面处理对PNT体外腐蚀性能的影响，在本研究中，对其进行了不同的表面处理，如水煮、干热和钝化处理。根据ASTM F 2129-08，通过循环极化试验在磷酸盐缓冲盐水溶液（PBS）中评估每种处理前后合金的局部耐腐蚀性。
