Method for extracting non-metallic inclusions in high-temperature alloy

The invention provides a method for extracting non-metallic inclusions in a high-temperature alloy, and relates to the technical field of metal materials. The extracted inclusions are high in purity and few in doping items, and a good qualitative extraction effect of the non-metallic inclusions in the high-temperature alloy can be achieved. The method comprises the following steps: determining theratio of electrolyte and an electrolysis system according to a polarization curve of the high-temperature alloy; carrying out non-aqueous weak acid solution electrolysis on a high-temperature alloy sample by adopting the electrolyte and an electrolysis system; during electrolysis, arranging a dialysis membrane used for collecting non-metallic inclusions on the periphery of the high-temperature alloy sample; carrying out reflux boiling on the solution containing the non-metallic inclusions by adopting a hydrochloric acid-ethanol solution, so as to remove interference items; and collecting non-metallic inclusions in a