Effect of alternating current on the corrosion behavior of Inconel 693 alloy in borosilicate glass

The corrosion behavior of Inconel 693 alloy in borosilicate glass at 1150°C with different alternating current (AC) densities was investigated. It was found that the samples with AC applied had greater dimensional loss than the samples without AC applied. The corrosion products were all the double-layer film in two cases, with the outer layer of Cr2O3 and the inner layer of Al2O3. In addition, corrosion was more severe with increasing current density. The AC promoted atomic diffusion and induced corrosion holes within the alloy matrix. Besides, the AC enrichment at the tip led to a localized temperature increase that exacerbated the corrosion of the sample coil section based on the simulation results.