EFFECT OF GLASS POWDER ON ACID RESISTANCE OF ENAMEL COATING

Abstract

Enamel glaze was added with glass powders of different sizes and masses and fired into enamel coatings on the surface of low-carbon steel. Acid resistance of the enamel coatings in H2SO4 solution was analyzed by X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM) and mass loss of acid corrosion. As was discovered in research, the acid corrosion quantity in the enamel coatings decreased with the decrease in the particle size of the glass powder when the particle size of the additive glass powder reduced from 100[Formula: see text][Formula: see text]m to 1–2[Formula: see text][Formula: see text]m and heated the prepared enamel coatings in the H2SO4 solution until 80[Formula: see text]C and kept for 48[Formula: see text]h. When the additive amount of the glass powder increased from 5% to 20%, the surface of the enamel coating was smooth and flat with good glossiness and without defects like obvious bubbles and cracks, and the acid corrosion quantity decreased with increase in the additive amount of glass powder, which decreased from 43.24[Formula: see text]mg/cm[Formula: see text]d to 4.28[Formula: see text]mg/cm2.d, satisfying the acid-proof performance requirements of industrial enamel coatings.