... environmental pollution, preventing corrosion for metal (zinc, aluminum, etc.). Therefore, sodium metasilicate anhydrous is widely used for the manufacture of a ... , penetrating, and also has the capability of buffering PH value.Sodium Metasilicate AnhydrousPackingThe inner bag is sealed PE plastic bag while ... %-51.50%51.14%SiO2%:45.00%-47.00%46.31%Whiteness%:85.00%MIN97.34%Particle size(>70 mesh)% :93 ...