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2019 №01 (03) DOI of Article
2019 №01 (05)

Automatic Welding 2019 #01
Avtomaticheskaya Svarka (Automatic Welding), #1, 2019, pp. 29-39

Dependence of hygroscopicity of coatings of low-hydrogen electrodes on composition and structure of liquid glass

A. E. Marchenko1, V. V. Trachevskii2, 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

Presented were the results of hygroscopicity of coatings of low-hydrogen electrodes depending on composition of liquid Li-, Na- and K-glasses as well as their binary mixtures, which were interpreted from point of view of evolution of silicon-oxygen structure in process of glass formation under effect of changing type and relationship of cations of alkali metals. Carried diagnostics of structure-functional self-organization of silicon-oxygen anions in composition of liquid glasses was performed based on data of nuclear magnetic resonance. The spectra of nuclear magnetic resonance 29Si were used. Generalized data were considered taking into account dominance of polycondensation mechanism. Correlation between the indices of coating hygroscopicity and relationship of bridging and Q4, Q3, Q2 and nonbridging bonds in structure of silicon-oxygen anions were determined. 19 Ref., 12 Tabl., 12 Fig.
Keywords: arc welding, welding electrodes, coating hygroscopicity, production technology, liquid glass, structure of liquid metal, spectroscopy of nuclear magnetic resonance

Received: 30.10.2018
Published: 20.12.2018

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