09-22/2020
The metal material of the three-piece tin body is tinplate. The metal packaging material for the top and bottom covers can be tinplate, chrome-plated iron, and aluminum. In addition to aluminum, it will not rust. Tinplate and chrome will rust when exposed to wet environments. The use can isolate the contact between metal materials and the outside world, avoid abrasion of the metal substrate, and prevent the corrosion of the substrate by the corrosion factors in the food.