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CoCr F75 Scaffolds Produced by Additive Manufacturing: Influence of Chemical Etching on Powder Removal and Mechanical Performance

CoCr F75 Scaffolds Produced by Additive Manufacturing: Influence of Chemical Etching on Powder Removal and Mechanical Performance

Brecht Van Hooreweder, Karel Lietaert, Bram Neirinck, Nicholas Lippiatt, Martine Wevers

J Mech Behav Biomed Mater. 2017 Apr;68:216-223.

PMID: 28189094

Abstract:

Additive manufacturing techniques such as Selective Laser Melting (SLM) allow carefully controlled production of complex porous structures such as scaffolds. These advanced structures can offer many interesting advantages over conventionally produced products in terms of biological response and patient specific design. The surface finish of AM parts is often poor because of the layer wise nature of the process and adhering particles. Loosening of these particles after implantation should be avoided, as this could put the patient's health at risk. In this study the use of hydrochloric acid and hydrogen peroxide mixtures for surface treatment of cobalt-chromium F75 scaffolds produced by SLM is investigated. A 27% HCl and 8% H2O2 etchant proved effective in removing adhering particles while retaining the quasi-static and fatigue performance of the scaffolds.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
LS75125	Chromium etchant			Price

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