Study on Resistance to Intergranular Corrosion of Heat Transfer Incoloy800H Tube

By using GB/T15260-94 B method,i.e.,copper-copper sulfate-16% sulfuric acid evaluates intergranular corrosion sensitivity of nickel-based alloys,the intergranular corrosion test results of domestic heat transfer Incoloy800H tube of High-Temperature Gas-cool Reactor（HTR） nuclear power plant demonstration project are studied under different test conditions,and compared to the intergranular corrosion performance of imported Incoloy800H alloy tube.The results show that the main factors to influence the alloy resistance to intergranular corrosion are C and Ti contents,and the sensitivity increases with increasing of C content.The effective measure to prevent intergranular corrosion is to add Ti element to reduce the sensitivity to intergranular corrosion.