Evaluation of the Properties of Alternative Construction Combined Tube Joints from Heat Exchanger Tube Grids Made of Steel 2Cr18Ni10Ti

• Published in: Chemical and petroleum engineering 2019-11, Vol.55 (7-8), p.681-686
• Main Authors: Yakhin, A. V., Karetnikov, D. V., Cherepashkin, S. E., Rizvanov, R. G.
• Format: Article
• Language: English
• Subjects: Arc resistance heating; Arc welding; Chemistry; Chemistry and Materials Science; Corrosion; Corrosion resistance; Corrosion resistant steels; Electrode potentials; Electrodes; Equipment and supplies; Evaluation; Friction resistance; Friction welding; Geotechnical Engineering & Applied Earth Sciences; Grain boundaries; Heat exchanger tubes; Heat treating; Heat treatment; Heating; Industrial Chemistry/Chemical Engineering; Industrial Pollution Prevention; Intergranular corrosion; Mineral Resources; Steel; Technology of Production; Tube grids; Tube joints; Uniform attack (corrosion); Welded joints; Welding
• ISSN: 0009-2355; 1573-8329
• DOI: 10.1007/s10556-019-00679-6

One of the most effective ways of excluding heat treatment during the manufacture if tube bundles is replacement of arc welding by rotary friction welding. The corrosion resistance of welded joints of 12Cr18Ni10Ti steel, prepared by friction welding and not subjected to heat treatment is evaluated. The corrosion properties of such welded joints, including those not subjected to heat treatment, are evaluated. Measurements of the electrode potential of welded samples are performed to determine zones prone to brittle fracture. It is established that the spread of electrode potential values is small that makes it possible to propose that there is uniform corrosion in a welded joint. Tests for welded joint specimen resistance to intergranular corrosion show that there is no grain boundary breakdown to a depth of more than 30 μm in 12Cr18Ni10Ti steel specimens, which indicates joint intergranular corrosion resistance.