Enamel: metal surface coated with multiple layers of enamel, through 800 ° C or so of the furnace firing, the physical and chemical reaction between the two porcelain, glaze and metal combination of a layer of composite material. Enamel metals include: copper, aluminum, low carbon steel. . And so on Mainly used for decoration and jewelry, building materials surface, decoration and anticorrosion, bathtubs, water heaters, water tanks and other daily products; therefore enamel is divided into: art enamel, daily enamel, sanitary enamel, construction enamel, cast iron enamel… Generally referred to as: daily enamel.

Vitreous Enamel: a layer of vitreous glaze with special properties that is fired at high temperature on a metal substrate in an oven of about 820-950 ° C. Metal matrix refers to: all kinds of petrochemical equipment have a certain strength of carbon steel, stainless steel containers, pipelines, etc. ; mainly used in chemical high, low temperature, pressure, corrosion resistance and other reactions, storage… Anti-corrosion equipment, collectively known as glass-lined equipment! Glass-lined in the late 1960s before known as: industrial enamel!

Vitreous enamel equipment is made by coating the enamel with high silicon content on the metal surface, through 950 ° C enamel firing, so that the enamel is tightly bound to the surface of the metal iron tire. Therefore, it has the chemical stability and metal strength similar to the double advantages of glass. Glass-lined equipment is widely used for reaction, evaporation, concentration, synthesis, extraction, polymerization, saponification, mineralization, chlorination, nitrification and so on in industrial production and scientific research of chemical industry, medicine, dyestuff, pesticide, organic synthesis, petroleum, food manufacturing and national defense industry, etc. , instead of expensive stainless steel and Non-ferrous metal. Corrosion Resistance: for various concentrations of inorganic acids, organic acids, organic solvents and weak base and other media have very strong corrosion resistance. But it is not suitable for strong alkali, hydrofluoric acid and fluorine-containing medium, and phosphoric acid whose temperature is more than 180 °C and concentration is more than 30% .

Glass-lined equipment mainly includes: reaction tanks, storage tanks, distillation tanks, condensers, the design and manufacture are based on GB150 -1998“Steel pressure vessel” and“Safety technical supervision regulation for pressure vessel” and HG2432 -2001“Technical conditions for glass-lined equipment”. A composite material in which one or more layers of enamel are coated on a metal surface and the two are bonded by a physical-chemical reaction after firing. Old name enamel. There are inherent mechanical strength and processing properties of metal, and coating with corrosion resistance, wear resistance, heat resistance, non-toxic and decorative. Enamel originated from glass decoration metal. Ancient Egypt came first, followed by Greece. In the 6th century Europe inlaid silk enamel, tick enamel, relief enamel, translucent enamel, painting enamel one after another. In the 8th century, China began to develop enamel, and by the end of the 14th century, the art of enamel was becoming more and more mature. At the beginning of the 19th century, the development of cast iron enamel in Europe laid the foundation for the development of enamel from handicrafts to daily necessities, but the application of cast iron enamel was limited because of the backward casting technology at that time. In the 19th century, the development of various industries, promote the rise of steel enamel, opened up a new era of modern enamel. From the end of the 19th century to the first half of the 20th century, various kinds of enamel glazes with different properties were invented, steel plates and other metallic materials were used, and the Refractory, kiln and enamelling techniques were constantly updated, accelerated the development of enamel industry. There are many kinds of enamel, according to the use can be divided into art enamel, daily enamel, sanitary enamel, architectural enamel, industrial enamel, special enamel and so on. Enamel production is mainly glaze preparation, body preparation, enamel, drying, firing, inspection and other processes. For art enamel, daily enamel, sanitary enamel, building enamel, in order to decorative appearance and the need for use, but also after decoration and assembly. Industrial enamel equipment is to be tested before assembly.

Enamel and vitreous enamel are only different in name, in fact, there is no essential difference, as far as enamel is concerned, it refers to the daily use of enamel, the corrosion resistance required is poor, the main ingredients and contents of the glaze formula used are: silicon dioxide 20% -50% , titanium dioxide 8% -20% , diboron trioxide 10% -20% , sodium oxide 10% -20% , the composition and content of the glaze are as follows: silicon dioxide 50% -80% , diboron trioxide 12% , sodium oxide 12% , cobalt oxide 3% . It can be seen that the main components of enamel and vitreous enamel are silicon dioxide. However, there is a significant difference in the content. The higher the content of silicon dioxide enamel, the closer it is to the silicon dioxide content of glass, the more close to the corrosion resistance of glass, compared with ordinary glass, glass can be tightly packed on the metal matrix and has a relative flexibility, so can be combined into excellent corrosion resistance equipment, thus can be seen, the composition of the porcelain layer of industrial enamel is closer to that of glass, so it is called enamel glass. Can draw the following conclusion: enamel, generally refers to daily enamel, industrial enamel is enamel glass.