PROTECTIVE COATINGS BASED ON THE ALKALI SILICATES

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62243136%3A_____%2F16%3AN0000016" target="_blank" >RIV/62243136:_____/16:N0000016 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

PROTECTIVE COATINGS BASED ON THE ALKALI SILICATES

Original language description

The soluble synthetic silicates, in the liquid form called also sodium water glass, potassium water glass, lithium water glass (eventually their combinations) are quite frequently used as binders for various systems (coating compositions, cements, forms, cores and coatings in foundries, welding electrodes, building materials, refractories, insulation materials). They give to them not only ecological harmlessness, but also e.g. acid resistivity (cements), high steam permeability (facade coating compositions), incombustibility (fire resistant coating compositions), anticorrosive protection (zinc rich paints). Zinc silicate coatings or coats based on inorganic silicate binder together with organic coatings pigmented with zinc belong into the group of the so-called zinc coatings with a high content of zinc metal of 80–95 wt. % in the nonvolatile coating fraction. Dry layers of nominal thicknesses of 60–90 µm are determined to long-duration anticorrosion protection of steel structures, especially in atmospheres of the corrosion aggressivity degree C3, C4, and C5 (ČSN ISO 9223). The results obtained were evaluated from the silicate binder type point of view, so as the used hardening system type point of view. The overall best results were obtained with a lithium-sodium water glass, the coats of which exhibit good physico-mechanical and anticorrosion properties. From the composition point of view the coating materials filled with zinc powder exhibit very good results. Zinc with lamellar particle shape exhibits a higher anticorrosion efficiency.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

CA - Inorganic chemistry

OECD FORD branch

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Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů