Use of cobalt-containing oxide waste for synthesizing enamels

It is shown that introduction of up to 7 wt.% cobalt-containing oxide catalyst waste into the mixture for synthesizing acid-resistant one-coat enamel does not worsen its wettability. The content of cobalt in such an enamel amounts to 0.2 – 0.3 wt.%, which is sufficient for its satisfactory cohesion with steel.