Understanding the different types of porcelain enamel coating

Manufacturers use polyurethane porcelain enamel coatings in a wide array of environments, often as a protective final coat over other custom formulated industrial primers. Polyurethanes resist abrasion, and can enhance durability to withstand wear and tear and abuse.

These porcelain enamel coatings maintain color and can have an attractive, high-gloss finish, if desired. Aliphatic polyurethane porcelain enamel coatings have good UV and environmental durability. Such porcelain enamel coatings are a good choice for outdoor applications.

Aromatic polyurethane products resist degradation in wet conditions or underwater, but they tend toward fading when exposed to UV light. These porcelain enamel coatings can work well in interior environments.

Two component polyurethanes do require protection for workers when applied, as with many other types of chemical processes. They are available in low VOC formulations.

Enamel coating for undersea tunnel wall panels

On 23rd OCT, 2018, Hong Kong-Zhuhai-Macau Bridge opening ceremony is hold in Zhuhai, Guangdong. This bridge will be officially opened to traffic. After this, driving from Hong Kong to Zhuhai and Macau will only take 45mins. This provide much convenience for the residents and travelers both in Hong Kong, Zhuhai and Macau.


This bridge has very long undersea tunnel, the side wall of which is all decorated by vitreous enamel panels.

Vitreous enamel panels, also known as porcelain enamel panels, it’s corrosion resistant, fire resistant and high temperature resistant. Enamel coating thickness can be 0.5mm, and it’s of high weather resistance. Which can be kept for more than 100 years, without any fades even exposed to wind and rain.


Enamel coating is widely applied in our daily life. For example: cookware, oven, BBQ, bathtub and so on. Vitreous enamel panels is only one of the applications among these. Including enamel signage, mark, subway or undersea tunnel wall panels and architecture panels etc…

Hunan Noli Enamel Co., Ltd is the leader manufacturer of porcelain enamel frit and vitreous enamel powder in China. Focused on enamel coatings for almost 30 years.

We can provide very professional vitreous enamel coating solution for subway and undersea tunnel wall panels. Our ground coat frit A-9, A-10 and super white frit is specially designed for this field. The quality can be almost same with Japanese enamel frit manufacturer Tomatec and with much lower production cost. Which makes us the top one choice to replace them.

Porcelain Enamel Coating

From world-class raw materials and production facilities to global presence and process knowledge, we develop product solutions for your porcelain enamel coating and frit needs. Through technical know-how, we formulate specialty frit based products that meet the needs of the consumer white goods, hot water tanks, sanitary ware, cookware, and other industries. We have dedicated R&D centers and staff specialists to assist customers in achieving consistent, high quality output and increasing productivity. As an industry leader, we specialize in understanding the role of porcelain enamel coating and glass enamels across a wide spectrum of applications.

Frits are the basis and main component of an porcelain enamel coating. Each PEMCO® frit is individually designed to address the complex variables of chemistry and end use application. Quality raw materials are blended and melted to create a frit technically adapted for different applications. Our range of products is composed of ground coat, transparent, opaque and white frits that are engineered to match desired color, aspect, or effect.

We engineer PEMCO® frits into a pre-milled, ready-to-use formulation to provide customers with a powder for liquid application. The use of pre-milled products eliminates the need for costly milling equipment. Just add water and mix! One of the most successful innovations in the porcelain enamel coating industry has been the development and continued improvement of our portfolio of PEMCO® Electrostatic Powders. The advantages of electrostatic powders include automated application, elimination of hazardous waste, reduction of energy costs for milling and drying and labor costs in mill room and set up, excellent finish quality, and maximized utilization of material.

This article comes from princecorp edit released

High-Temperature Porcelain Enamel Coating

To attach a porcelain enamel coating to any substrate by enameling, both substrate and glass must be heated to the fusion temperature of the glass. However, fusion methods have not been successful for the more refractory materials. Because most refractory porcelain enamel coatings are amorphous or crystalline in nature, they have to be applied by relatively novel techniques.

Although most ceramic materials are refractory, some of them can be vaporized in an electric arc or hot vacuum. Thin porcelain enamel coatings of amorphous silica can be applied readily to relatively cool substrates by vaporizing metallic silicon or silicon halides in the presence of small quantities of oxygen. Apparently the transfer is accomplished largely as silicon monoxide, which recombines with oxygen on cooling. The process is used to obtain thin, protective, optically transparent films on lenses, certain electrical components, and metal reflectors.

Other porcelain enamel coatings may be produced by vaporizing one or more components of the coating. In this way porcelain enamel coatings of the respective carbides of silicon, boron, aluminum, and chromium can be deposited on graphite, silicon nitride can be formed on metallic silicon, and silicide coatings can be deposited on metals such as tungsten and molybdenum. These processes are necessarily expensive and are poorly adaptable to large specimens or complex shapes.

This article comes from what-when-how edit released