With the development of material science, there are more and more types of pots in the kitchen. According to the materials, they can be divided into iron pots, aluminum pots, and stainless steel pots. Among so many metal pots, which one has stronger comprehensive performance and is more suitable for daily use?
Weight
Generally speaking, the weight of aluminum pan is much lighter than that of iron pan and stainless steel pan. Under the same volume, the weight of aluminum is lower than that of iron, copper, and nickel. For women with less strength, the aluminum pan is easier to grasp, even if you pick up the pan and stir-fry it is completely fine.
corrosion resistance
As we all know, ordinary iron pans are extremely easy to rust and be corroded. After daily use, it is necessary to dry the domestic water to prevent rust. At the same time, in order to prevent rust, some manufacturers will apply a layer of coating on the iron pan. Aluminum pots and stainless steel pots can react with oxygen in the air to form a dense oxide film on the surface of the pot body to prevent the liquid in the pot from corroding the surface of the pot.
Heat Resistance
Heat resistance means that the metal can still maintain its excellent physical and mechanical properties at high temperatures, and the performance of stainless steel pots is even better at this point. For example, although the melting point of iron is 1538°C, it is very easy to undergo a violent oxidation reaction with oxygen after heating to form iron oxides. Aluminum is an active metal with certain heat resistance, but the melting point of aluminum is only 660°C, so it is easy to soften at high temperature. 304 and other high-quality stainless steel materials contain nickel, chromium and other metals, and can withstand high temperatures of 800°C.
Thermal Conductivity
For pots used for cooking and cooking, thermal conductivity is naturally also a very important indicator. The thermal conductivity of aluminum is 237 W/mK, that of iron is 80 W/mK, and that of stainless steel is 17 W/mK, where higher numbers indicate better thermal conductivity.
Health and Safety
Although kitchen pots and utensils are more or less resistant to corrosion and high temperature, it is inevitable that metal will be precipitated after a long time of use. There is also a risk of aluminum precipitation if the aluminum pot is used for a long time. The aluminum element can damage human brain cells, so it is more dangerous. Stainless steel contains heavy metal elements such as nickel and chromium. If there is metal precipitation, it may cause chronic poisoning.
Iron pots are mostly made of pig iron, which has the advantages of almost no heavy metal elements harmful to the human body and is durable. After long-term use, iron will precipitate, but it is less harmful to the human body.
Suggestion
To sum up, the pots of each metal material have their own advantages. However, with the awakening of people's health awareness, the health and safety of pots have gradually surpassed heat resistance, thermal conductivity, and corrosion resistance as the factors for choosing pots. Therefore, iron pots have become the ideal choice for many people to cook. From ZhangQiu Wok