Abstract
The effect of alloying elements and microstructures on the corrosion resistance of weld metal was studied in order to select electrodes for arc welding equipment made of steel 12Kh18NIOT designed for operating in alkaline media. The chemical composition of metal deposit, and the new results of the corrosion tests are given. It was established that chromium, nickel, and niobium in the specimens tested reduced the rate of corrosion. A dependence was noticed between the corrosion rate of specimens and the content of delta-ferrite in the weld metal. Based on these results, electrodes ensuring weld metal with an austenitic-ferritic structure were recommended.
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