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

The Paton Welding Journal 2019 #01
TPWJ, 2019, #1, 15-24 pages
Journal                    The Paton Welding Journal
Publisher                 International Association «Welding»
ISSN                      0957-798X (print)
Issue                       #1, 2019 (February)
Pages                      15-24

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

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

Presented were the results of investigation 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 a silicon-oxygen structure in the process of glass formation under effect of changing type and relationship of cations of alkali metals. Carried diagnostics of structure-functional self-organization of the silicon-oxygen anions in composition of the liquid glasses was performed based on data of a 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 bridge Q4, Q3, Q2 and nonbridge Q1 connectivities in structure of the silicon-oxygen anions were determined. 19 Ref., 2 Tables, 12 Figures.
Keywords: arc welding, welding electrodes, coating hygroscopicity, production technology, liquid glass, structure of liquid metal, spectroscopy of nuclear magnetic resonance
Received:                30.10.18
Published:               13.02.19
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