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, stainless steel pots, titanium pots, etc. Among so many metal pots, which one has stronger comprehensive performance and is more suitable for use in daily life?
The weight of the pot
Generally speaking, the weight of aluminum and titanium pots is much lighter than that of iron and stainless steel pots. Under the same volume, aluminum pots are lighter than titanium pots. Because the density of titanium is 4.506-4.516 grams per cubic centimeter (20 ° C), which is higher than that of aluminum and lower than that of iron, copper, and nickel. For women with less strength, aluminum pans and titanium pans are easier to master, even if you pick up the pan and stir fry.
Corrosion resistance of the pot
As we all know, ordinary iron pots are very easy to rust and corrode. In order to prevent rusting, some manufacturers will apply a layer of coating on the iron pot. Titanium pots, aluminum pots and stainless steel pots can all react with oxygen in the air to form a dense oxide film on the surface of the pot to prevent the liquid in the pot from eroding the surface of the pot. In addition, titanium has excellent corrosion resistance, and even highly corrosive liquids and gases such as seawater, aqua regia, and chlorine gas are difficult to corrode, which is difficult for aluminum, iron or stainless steel.
Heat resistance of the pot
Heat resistance means that the metal can still maintain its excellent physical and mechanical properties at high temperatures. At this point, the performance of titanium pots and stainless steel pots is more superior. 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 a certain degree of heat resistance, but the melting point of aluminum is only 660 ° C, which is easy to soften at high temperatures. The melting point of titanium is 1668±4°C, and its chemical properties are stable within 500°C; 304 and other high-quality stainless steels contain metals such as nickel and chromium, which can withstand high temperatures of 800°C.
Thermal conductivity of the pot
For pots used to cook vegetables and rice, thermal conductivity is naturally also a very important indicator. The thermal conductivity of aluminum is 237 W/mK, iron is 80 W/mK, titanium is 14.63W/mK, and stainless steel is 17W/mK, where higher numbers indicate better thermal conductivity. Although the thermal conductivity of titanium metal is lower than that of aluminum and iron, due to the excellent corrosion resistance of titanium, the wall thickness of the pot can be greatly reduced, and the heat exchange between the surface and the steam is dropwise condensation, which reduces the thermal resistance. No scaling can also reduce thermal resistance, so that the thermal conductivity of titanium is significantly improved.
Pot health and safety
Although kitchen pots can resist corrosion and high temperature to some extent, metal will inevitably precipitate over time. There is also a risk of precipitation of aluminum in aluminum pots that have been used for a long time. Aluminum 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 that are harmful to the human body and durable. After long-term use, iron is precipitated, but it is less harmful to the human body. Titanium is a healthy "biological metal" recognized by the scientific community. It is non-toxic and has good compatibility with human tissues and blood. Therefore, pots made of titanium can be said to be healthy and harmless.
To sum up, the pots of each metal material have their own merits. However, with the awakening of people's health awareness, the health and safety of the pot gradually surpasses heat resistance, thermal conductivity, and corrosion resistance to become the first factor in purchasing pots. In addition, the overall performance of titanium is excellent, so titanium pots It has become an ideal choice for many people's cooking.
Contact
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