SILICATE COATING COMPOSITIONS

摘要

Aqueous zinc.containing coating compositions are provided in which the bonding agent is a blend of sodium and/or potassium silicate and lithium polysilicate the latter being in relatively high proportion particularly over 30% up to 70% by weight of silicate. Preferably the composition contains particulate flaked zinc. The composition is of particular value in enhancing corrosion resistance of articles produced from powered metal or non-passivated galvanized artefacts.