Yes.
Since powdered metal components are porous, the absorption of contaminants into PM parts poses a difficulty as well as a flame hazard for welding. Preventing contaminants from being absorbed into the part is critical in weld applications.
Simple Test to Identify the Presence of Porosity Contaminants in PM Parts
Atlas uses a hot plate test that is also commonly used by our platers, which will show if there are contaminants in the part. This test consists of heating the hot plate to between 150°-350°F and placing the part on the hot plate. The temperature range will depend on the type of contaminant that you might expect to see in the part. A “smoking” part is a tell-tale sign.