In the process of beer production cannot get beer equipment use less, due to reasons such as economic costs, now is used stainless steel beer equipment, just beer belongs to the consumption of goods, so have strict requirements for stainless steel materials, such as: food grade raw material; Safety and health, etc. For commonly used stainless steel beer equipment, often with 201 stainless steel than with the material of 304 stainless steel, etc. , these two kinds of material in performance, 201 stainless steel is much cheaper than 304 stainless steel, in durability, 304 stainless steel dining tables and feet is more suitable for outdoor use, better rust resistance. The tank with more than 306 stainless steel, but some manufacturer will use 201 stainless steel, because the price is cheap, but not 304 good corrosion resistance and compatibility, and the best food contact materials for 306. With electrolyte, dripping onto the stainless steel, the anode on stainless steel, the cathode on electrolyte and the cathode can't contact with stainless steel. If electrolyte become red is 201, on the other hand is 304.