The Paton Welding Journal, 2018, №06



2018 №06 (01)

DOI of Article 10.15407/tpwj2018.06.02

2018 №06 (03)

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The Paton Welding Journal, 2018, #6, 9-19 pages
 

Effect of liquid glass composition and structure on the strength of low-hydrogen electrode coatings

A.E. Marchenko¹, V.V. Trachevsky² and N.V. Skorina¹

¹E.O. Paton Electric Welding Institute of the NAS of Ukraine 11 Kazimir Malevich Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua
²Technical Center of the NAS of Ukraine 13 Pokrovskaya Str., 04070, Kyiv, Ukraine. E-mail: tracev@imp.kiev.ua
 
The paper presents the results of investigations of the strength of coatings of low-hydrogen electrodes, baked at 200, 300 and 400 °C, depending on the composition of liquid Li-, Na- and K-glasses, as well as their binary mixtures. Investigation results were interpreted from the viewpoint of evolution of silicon-oxygen structure of liquid glasses under the conditions of changing kind and ratio of cations-modifiers, as well as the level of water content, related to the parameters of electrode heat treatment. Diagnostics of structural-functional self-organization of silicon-oxygen anions (SOA) in the liquid glass composition was performed with application of the data of nuclear magnetic resonance (NMR). NMR²⁹Si spectrum was used. The generalized results were considered in terms of dominance of polycondensation mechanism. A correlation was established between the values of coating strength and ratio of bridge Q⁴, Q³, Q² and non-bridge Q¹ connectivities in SOA structure. 8 Ref., 4 Tables, 12 Figures.

Keywords: arc welding, welding electrodes, manufacturing technology, liquid glass, liquid glass structure, application of NMR spectroscopy method
 
Received:                13.04.18
Published:               05.07.18
 
 
References

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6. Marchenko, A.E., Skorina, N.V., Kiselev, M.O. et al. (2017) Nuclear magnetic spectroscopy study of the structure of liquid glasses for welding electrodes. The Paton Welding J., 1, 41–45. https://doi.org/10.15407/tpwj2017.01.07
7. Marchenko, A.E. (2010) On physical-chemical nature of electrode coating strength and technological means of its assurance. In: of 5th Int. Conf. Dedicated to 20th Anniversary of Association «Electrode» on Welding Consumables. Technologies. Production. Quality. Competitiveness (7–11 June 2010, Artyomovsk, Donetskaya Reg.). Kiev, 78–99.
8. Marchenko, A.E., Skorina, N.V., Suprun, S.A. (2012) Waterretaining capacity of alkaline silicates and its effect on dehydration of electrode coatings. In: Arc welding metallurgy and welding consumables. Kiev, Akademperiodika, 290–302 [in Russian].

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Suggested Citation

A.E. Marchenko, V.V. Trachevsky and N.V. Skorina (2018) Effect of liquid glass composition and structure on the strength of low-hydrogen electrode coatings. The Paton Welding J., 06, 9-19.

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