A study of the effect of adding antimony oxide to the coating surfaces of steel and cast Iron by glass

الملخص EN

The study included adding antimony oxide to mixtures of coating metal surfaces (Enameling), after it was selected ceramic materials used in the coating metal pieces of the type of steel and cast iron in two layers.

The first is called a ground coat and the second is a cover coat.

Ceramic materials layer for ground coat have been melted down in platinum crucible at a temperature of 1200oC to prepare the glass mixture (Frit).

It was coated on metals at a temperature of 780oC for two minutes, while the second layer was prepared glass mixture (Frit) at a temperature of 1200oC, but was coated at a temperature of 760oC for two minutes.

Underwent tests crystalline state of powders (Frits) and enameled samples using X-ray diffraction technique and found that the process of powders and ground coat layer is random, while the cover layer included having developed a silicon oxide and titanium oxide phases.

It was measured density, coating thickness and Knoop hardness for each layer.

As well as practical tests conducted dipping enameled samples in diluted and concentrated sulfuric acid, as well as diluted and concentrated hydrochloric acid for three days at a temperature of 100oC.

The samples showed good resistance against these acids.

The addition of antimony oxide reduced the presence of bubbles in the coated cast iron and enhancement physical and mechanical properties.