Chemical resistance of porcelain enamel at various temperature levels key: 1fully resistant 2resistant over a limited period only 3non-resistant temperature in degrees fahrenheit chemical 85u00b0 212u00b0 350u00b0 acetaldehyde 1 1 1 acetic acid 1 1 1 acetic anhydride 1 1 1 acetone 1 1 1 acetyl salicylic acid 1 1 1 acrylic acid 1 1 1 alcohol ... The bubble structures, fishscaling resistance, adhesion and its mechanism of vitreous enamel to low carbon steels were evaluated by microscopic methods. Porcelain enamel is a specially formulated, highly durable glass permanently fused to metal under extremely high temperatures. the metal may be steel, cast iron, or aluminum. it may be a protective surface for cooking utensils, kitchen and bathroom fixtures, and appliances such as dishwashers, ranges, refrigerators, washers and dryers. Vitratek porcelain enamel general specs porcelain enamel is a mixture of mineral content glass and inorganic pigments fused to a steel substrate at temperatures exceeding 1400o fahrenheit. this extreme temperature literally melts and fuses the glass to the steel, forming a molecular bond and creating a perma-nent coating.