Avtomaticheskaya Svarka (Automatic Welding), #12, 2020, pp. 44-51
Corrosion and mechanical durability of welded joints of aluminum alloy V1341, produced by argon-arc welding by free and constricted arc
L.I. Nyrkova, T.M. Labur, S.O. Osadchuk, M.R. Yavorska
E.O. Paton Electric Welding Institute of the NAS of Ukraine.
11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: firstname.lastname@example.org
The paper presents the results of studies of corrosion and mechanical resistance of welded joints of V1341 alloy of 1.2 mm
thickness, depending on the technology of manual argon arc welding with free and constricted arc. The strength coefficient of
welded joints is 0.79 and 0.8, respectively. Potentiometric measurements showed an electrochemical heterogeneity between
the base metal and welded joints obtained by free and constricted arc; with a potential difference equal to 100 mV and 86 mV,
respectively. More positive potential is inherent to the region with a smaller weld area, which is safe for operation. Accelerated
corrosion tests have determined that the shape of the arc column in manual welding does not affect the resistance of welded joints
against exfoliating corrosion and against corrosion-mechanical breaking under conditions of constant deformation. The level of
resistance of the base metal against exfoliating corrosion of the joints, produced by both types of arc welding technology, was
estimated by number 2-3. The fracture time of specimens of the joints produced by free arc welding, decreased on average to
20 days compared to the base metal (73 days). Similar results were obtained for joints welded by a constricted arc. At the same
time, it was found that using of a constricted arc for welding causes a lowering of the resistance of the joints against intergranular
corrosion. The maximum breaking depth of grain boundaries for joints produced by a free arc is 0.350 mm, and for the joints
made by a constricted arc it is 0.460 mm. 15 Ref., 3 Tabl., 11 Fig.
aluminum alloy, free and constricted arc welding, welded joint, mechanical properties, structure, intergranular
corrosion, exfoliating corrosion, corrosion under constant deformation, potentiometry, accelerated corrosion tests
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10. Koval, V.A., Labur, T.M., Yavorska, T.R. (2020) Properties of joints of V1341T grade alloy under conditions of TIG welding. The Paton Welding J., 2, 35-40. https://doi.org/10.37434/tpwj2020.02.07
11. GOST 1497-84: Metals. Test methods on tension. Moscow,
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12. GOST 6996-66: Welded joints. Methods of mechanical properties
determination. Ibid. [in Russian].
13. GOST 9.021-74: United system of corrosion and ageing protection.
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tests for interctystalline corrosion. Ibid. [in Russian].
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layer corrosion. Ibid. [in Russian].
15. GOST 9.019-74: United system of corrosion and ageing protection.
Aluminium and magnesium alloys. Methods of accelerated
tests for corrosion cracking. Ibid. [in Russian].
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