Evaluation of the corrosion resistance of an additive manufacturing steel using electrochemical techniques

Author:

Agredo-Diaz Dayi GilbertoORCID,Barba-Pingarrón ArturoORCID,Ortiz-Godoy NicolasORCID,González-Parra Jesús RafaelORCID,Olaya-Florez Jhon Jairo,Cervantes-Cabello José JavierORCID,Ortiz-Otalora Cesar ArmandoORCID

Abstract

Additive metal manufacturing has undergone a revolution in recent years, being able to be incorporated in several industries such as aeronautics, automotive and even in medicine, allowing the manufacture of complex parts with fewer steps in the process, which translates in material savings and cost reduction. In this work, the corrosion of low carbon steel obtained by depositing consecutive layers is carried out, using electrochemical impedance spectroscopy and electrochemical noise immersed in a 0.1 M NaCl solution, establishing a comparison between the metal of contribution and deposited material. The layers of the material are characterized microstructurally and mechanically using scanning electron microscopy and Vickers microhardness. Overall, the results show a good response of the material to the action of the electrolyte after the immersion time, on the other hand, the microstructural results allow identifying the formation of 3 zones due to the cooling of the material. The microhardness of the steel does not show great changes between the zones, however, there is a slight increase in the intermediate zone due to the reduction in grain size. These studies allow researchers to know the behavior of these materials in applications that require contact with corrosive solutions of this nature.

Publisher

Universidad Industrial de Santander

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