具有钛等离子喷涂涂层的钴铬钼假体的电化学腐蚀和金属离子释放。

Electrochemical corrosion and metal ion release from Co-Cr-Mo prosthesis with titanium plasma spray coating.

作者信息

Reclaru Lucien, Eschler Pierre-Yves, Lerf Reto, Blatter Andreas

机构信息

PX Holding S.A., Bldv des Eplature 42, 2304 La Chaux-de-Fonds, Switzerland.

出版信息

Biomaterials. 2005 Aug;26(23):4747-56. doi: 10.1016/j.biomaterials.2005.01.004.

DOI:10.1016/j.biomaterials.2005.01.004

PMID:15763254

Abstract

The corrosion behavior of CoCrMo implants with rough titanium coatings, applied by different suppliers by either sintering or vacuum plasma spraying, has been evaluated and compared with uncoated material. The open-circuit potential, corrosion current and polarization resistance were determined by electrochemical techniques. The Co, Cr and Ti ions released from the samples into the electrolyte during a potentiostatic extraction technique were analyzed using ICP-MS. The Ti coatings from the different suppliers showed a different porous morphology, and the implants exhibited a distinct corrosion activity, underlining the importance of the coating process parameters. Among the titanium coated samples, the one with the sintered overcoat turned out to be the most resistant. Yet, on an absolute scale, they all showed a corrosion resistance inferior to that of uncoated CoCrMo or wrought titanium.

摘要

由不同供应商通过烧结或真空等离子喷涂工艺制备的带有粗糙钛涂层的钴铬钼植入物的腐蚀行为已得到评估，并与未涂层材料进行了比较。通过电化学技术测定开路电位、腐蚀电流和极化电阻。使用电感耦合等离子体质谱法（ICP-MS）分析了在恒电位萃取技术过程中样品释放到电解液中的钴、铬和钛离子。来自不同供应商的钛涂层呈现出不同的多孔形态，并且植入物表现出明显不同的腐蚀活性，这突出了涂层工艺参数的重要性。在涂钛样品中，带有烧结外涂层的样品表现出最强的耐腐蚀性。然而，从绝对尺度来看，它们的耐腐蚀性均低于未涂层的钴铬钼或锻造钛。