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For cast iron enamel, especially the enamel grill of the gas stove or enamel grid or baking pan in the barbecue oven, because it is in contact with food, it will inevitably be corroded by salty liquid, coupled with the characteristics of cast iron enamel, so for this kind of products Salt spray performance is very important.
At present, the standards for salt spray test in the enamel industry are different. Generally, it is required to pass the salt spray test for 48 hours without rust, followed by 72 hours. Internationally, enterprises have higher requirements for salt spray test standards. In fact, 72-hour salt spray resistance is already a relatively high standard, and many companies can't meet it or can only barely meet it. So how to improve the salt spray resistance of cast iron enamel?
- Selection of enamel frit
Enamel frits play a vital role in the salt spray resistance of enamel products. Some excellent enamel suppliers in China have developed salt-spray-resistant enamel products suitable for enamel hobs or ovens, such as direct-on black salt-spray-resistant enamel. This kind of enamel has strict requirements on the melting process to ensure Enamel products can maintain good exhaust performance during the firing process, allowing the gas generated by the cast iron to be exhausted as much as possible, thereby reducing pinholes and air bubbles in the porcelain layer, and making it difficult for the salt spray in the salt spray test to erode the surface of the cast iron.
- Metal pretreatment
Castings must be carefully polished and strictly inspected to confirm that the castings entering the production line have no white spots, no burrs, and sand holes on the surface. Sand blasted 2 times. If the surface roughness is too low, the adhesion of the finished product is poor, and the surface of the casting will be uneven if the roughness is high. The porcelain layer in the high place is thin and easy to be eroded by salt spray, and the porcelain layer in the low place is thick, which is not conducive to the gas flow during firing. Emission also has an adverse effect on the results of the salt spray test.
The pretreated enamel castings should be fired as soon as possible to avoid moisture and dirt.
- Enamelling
If cast iron enamelled products take a long time to enamel, this process may cause rust spots before drying. Therefore, it is best for enamel manufacturers to properly add anti-rust agents when grinding the enamel slurry, arrange the enamelling process reasonably to make the time closer, and dry thoroughly.
Four, firing
The firing time and temperature are subject to the glossiness of the product meeting the requirements. When firing, it is necessary to ensure that the product will not be warped and deformed, so as to avoid cracking of the porcelain layer and affect the salt spray performance.
What else can I help you with?
How does salt-spray resistant enamel coating help enamel stove manufacturers break through competitive bottlenecks?
In the fiercely competitive market of stoves, quality and innovation have become the key factors for each manufacturer to compete for market share. Enamel stoves themselves have the advantage of being corrosion-resistant, dirt-resistant, rust-resistant, and having a beautiful appearance. It can be said that enamel stoves have already entered every household. However, as consumer demand continues to increase, the requirements for the performance of enamel stoves are also increasing. Enamel stove manufacturers are facing unprecedented challenges - how to continuously improve product performance, especially salt-spray resistance, in the fierce market competition to meet the growing quality requirements of consumers? As an enamel coating material manufacturer, NOLIFRIT is customer-oriented and focuses on developing higher-performance enamel coatings to provide customers with more cost-effective products. Our independently developed cast iron matte glaze has shown excellent performance through rigorous salt-spray resistance testing, with no rust spots after 48 hours and 5 repeated thermal shocks at 320 degrees Celsius. This data not only stands out domestically but also approaches leading other brands in terms of technology. NOLIFRIT's salt-spray resistant enamel coating is not only effective in improving the salt-spray resistance of enamel stoves but also reduces production difficulties and improves production efficiency. This is undoubtedly a great boon for enamel stove manufacturers. We know that quality and innovation are the cornerstones of enterprise development, so NOLIFRIT is always committed to providing customers with professional and efficient solutions. In addition, NOLIFRIT also has a professional service team that can provide customers with comprehensive support from enamel coating selection, production guidance to after-sales service. We firmly believe that only by thoroughly understanding customer needs can we provide products and services that truly meet market demand.
Is cast iron enamel cookware dishwasher safe?
Yes, cast iron enamel cookware is dishwasher safe! Cast Iron is extremely tough andd very durable!
What is the difference between cast iron and steel enamel (from the perspective of enamel frit)?
To understand the difference between cast iron enamel and steel plate enamel, we must first know the difference between cast iron and steel plate. Both steel and cast iron are iron-carbon alloys, and the distinction between these two metallic materials is mainly based on carbon content. The cast iron generally used in enamel is gray iron or gray cast iron, and the carbon content is usually 3%~3.7%, while the carbon content of refined iron (low carbon steel cold-rolled sheet) is less than 0.12%, which means that cast iron contains more than steel plate. More impurities, when sintering, are more likely to generate carbon dioxide and other gases, resulting in enamel defects such as pinholes, air bubbles, and pores on the porcelain surface. Therefore, in the selection of enamel frit, cast iron enamel frit needs to meet the following conditions: low temperature firing, to avoid oxidation and decomposition of iron carbide in cast iron, and release carbon dioxide; good adaptability, which is conducive to gas in the early stage of firing It has good sealing performance, and does not allow gas to break through the porcelain layer and cause defects in the later stage of firing. Therefore, the formula design of enamel primer is very different from that of steel plate primer. For example, the firing temperature is generally 760~780℃, which is obviously lower than the high temperature of 850℃ of steel plate primer. At the same time, the addition amount of cast iron frit in borax, feldspar and other raw materials is larger than that of steel plate enamel frit, the purpose is to reduce the viscosity of the enamel frit, improve the wettability, form small pores and accommodate the gas discharged from the matrix, and improve the solubility of iron oxide. The formula design of cast iron enamel frit and steel plate enamel frit is very different, in order to meet the needs of enamel enamel frit for the corresponding material to the greatest extent.
What is the difference between a regular and an enamel cast iron pot?
Many years ago, our lives were filled with all kinds of enamel daily necessities, including enamel cups, enamel plates, and enamel basins. But now enamel products seem to gradually fade out of our daily life, and occasionally seeing these familiar enamel utensils in some restaurants featuring "retro", there will still be a feeling of nostalgia. However, in fact, many families still choose enameled cast iron color pots when buying pots. Why? In terms of functionality, the thermal conductivity of enameled cast iron pots and ordinary pots is the same, but enameled cast iron pots are more heat-resistant and less prone to rust, which means that the durability of enameled pots is far higher than ordinary color pots. Enamelled cast iron pot is made of cast iron pot coated with enamel frit and fired at high temperature. This enamel frit, a type of borosilicate material, has very good thermal properties, optical properties and chemical stability, which means it is very resistant to water and acid (cast iron pans are often exposed to food and fruit , and seasonings such as vinegar). In terms of aesthetics, now families have higher requirements for the beauty of home and furniture. Enamelled cast iron pots are also called enamel pots. The enamel layer on the outside of the cast iron can use different colors and even patterns, and the inner surface of the enamel cast iron pot also looks better than ordinary cast iron pans and improve the happiness of our family life. As for the toxicity of enameled cast iron pots, many people worry about it. On the one hand, the enamel product itself is very low in toxicity and will not precipitate substances that are toxic and harmful to the human body. There are stricter requirements.
Is enamel and regular cast iron seasoned the same way?
Dishes and pots lined with enamel are not porous on the cooking surface and therefore do not need the oil seasoning that cast iron does.
What are the differences between enamel cast iron and traditional cast iron cookware?
Enamel cast iron cookware has a smooth, non-stick surface due to its enamel coating, making it easier to clean and maintain. Traditional cast iron cookware is seasoned with oil to create a natural non-stick surface over time. Enamel cast iron is also more resistant to rust and acidic foods, while traditional cast iron requires more maintenance to prevent rusting and avoid acidic foods that can damage the seasoning.
Did John Michael Kohler invent the enamel bathtub?
In 1883 he enamelled a cast iron horse trough, so yes, he invented the enamel bathtub.
How do I treat my cast iron enamel cookware after washing to keep it in good condition?
Cast iron enamel cookware can handle very high temperatures but the enamel layer can be delicate and susceptible to scratching. So, after washing, make sure you gently hand dry with a soft towel and avoid scratching it on the prongs of the dish washer. Also, when cooking in the enamel cookware, use a wooden or plastic spatula instead of a metal spoon to avoid scratching or damaging the enamel layer.
What are some examples of enamel products?
Enamel products include a variety of items such as cookware (like enamel-coated cast iron pots and pans), decorative art pieces (like enamel jewelry and wall plaques), and household items (like enamel mugs and bowls). Additionally, enamel is used in the automotive industry for coatings on car bodies and in electrical applications for insulating wires. Enamel's durability and aesthetic appeal make it a popular choice across different industries.
What seasoning is needed for keeping the quality of the enamel cast iron top shape?
According to the article on Fine Cooking, enamel cast iron should be allowed to cool before washing to avoid cracking. Soaking for fifteen to twenty minutes can help loosen food residue. Finally, avoid using steel wool, which can damage the enamel.
What does 18k hce a mean on a ring?
"18k HCE" likely stands for 18 karat hard cast enamel. This indicates that the ring is made of 18 karat gold and features hard cast enamel as part of its design or construction.
How do you make a cast smell better?
put spray or purfume on.
