High Temperature Corrosion Of Additively Manufactured Inconel 625

Inconel alloys are used for the components of gas turbine, heat exchanger, and pressure vessels, etc., in aerospace, nuclear, chemical processing, and similar industries. In these applications, components made of Inconel are subjected to high temperatures and very corrosive environment. With the advent of additive manufacturing, components with relatively complex geometries can be fabricated. The objective of this work is to investigate the high temperature corrosion characteristics of additively manufactured (AM) Inconel 625. The specimens are exposed to 700 and 900 degrees C for different time periods. Upon cooling the samples to the room temperature, the weight change is examined. Post-characterization of Inconel 625 specimens is conducted using scanning electron microscopy and energy dispersive X-ray spectroscopy to identify the corrosion products and their distribution. This presentation will highlight the effect of specimen density (due to porosity) as a result of AM process.