The best stainless steel liner is made of 304 plate, which has excellent corrosion resistance and intergranular corrosion resistance. Slightly worse, 202 plate is selected for processing, and its rust prevention ability is slightly worse than that of 304 plate. The lower end is 20 1 disc. Therefore. The stainless steel liner with low price must be carefully selected.
Composite multi-layer material lining.
Basically, it can be divided into the following types: inner aluminum and outer steel two-layer liner, outer steel and inner aluminum two-layer composite liner, steel-aluminum-steel three-layer composite liner, liner coated with pure copper to further improve thermal conductivity, and liner coated with glass beads or ceramic beads for heat insulation. However, this kind of multi-layer liner is basically used in high-end products, and the price is basically more than 1,000 yuan.
Aluminum liner.
Aluminum has uniform heat conduction, easy molding and beautiful appearance, and can be compounded with other metals or alloys, so it is the main material of mid-range cookware. Because the aluminum liner can't directly contact with food, the surface must be protected to keep the necessary thickness, which is not conducive to saving materials.
Ceramic lining.
Ceramic liner, also called purple sand liner, is a safe inorganic material. The ceramic liner is rich in natural trace elements such as iron, zinc and calcium, which are beneficial to human health. The cooked food has good taste, strong acid and alkali resistance, corrosion resistance and good thermal insulation performance.