Hot corrosion behavior analysis and diffusion equation construction based on laser wire additive manufacturing GH3039

Laser wire additive manufacturing GH3039 samples with different process parameters are prepared. Then, hot corrosion test (Na₂SO₄+NaCl at 900 °C) is carried out. High power (5000 w), parallel to the deposition layer interface processing sample has good hot corrosion resistance due to the excellent internal organization. Element diffusion is the main factor affecting the hot corrosion performance. The element diffusion equation based on the multi-reaction interface is established and the degree of hot corrosion reaction can be directly judged. At the same time, the concept of determining the degree of hot corrosion reaction and predicting the trend of reaction by means of sulfides is proposed.