In addition to making the insulation cup in the stainless steel cup, it is also a very common cup for daily use. We most often use 304 stainless steel, which is a food -grade stainless steel.But the stainless steel cup cannot be used to soak some liquid, such as acidic liquid and tea.Stainless steel contains 里, acidic substances will destroy the protective layer of stainless steel, let the pupae analyze, and cause damage to the human body.Today, lets take a look at the poisonous stainless steel water cups and precautions to use stainless steel water cups.
Is the stainless steel water cup poisonous?
As we all know, stainless steel is made of iron chromium alloy and then mixed with nickel and other metals.Many elements in it are trace elements needed by the human body, such as iron and might.The water quality we quote, whether it is mineral water or tap water, well water, contains trace elements.正常情况下，我们使用不锈钢制品是有时限的，比如保温杯装水，也就几分钟到几小时甚至是几十小时，而根据测试结果，在这样的时间里金属成分的溶解十分有限，远Below the standards of domestic and foreign standards, so as long as it is used correctly, the harm to the human body is minimal.
In addition, pay attention to buying food -grade stainless steel water cups.The cheap stainless steel water cups on the market are usually toxic.
430 Stainless Steel (13-0): The oxidation caused by the unable to resist the chemicals in the air. After a period of time, it will still be aerobic (rusty) due to non-natural factors.
304 Stainless Steel (18-8): Again chemical oxidation; 304 is the material that must be used by the national pressure cooker standard. The standard material of the stainless steel pressure cooker is 304 or more.Essence
316 Stainless Steel (18-10): High-grade supplies are made of 10 % nickel to make it more durable and corrosion. This stainless steel is called 18-10 stainless steel, which is medical stainless steel. There is no metal ionic precipitation above.Poison, or standard -grade stainless steel.
Precautions for using stainless steel water cups
Stainless steel, sturdy and not easy, durable, beautiful and generous, long use time, diverse shapes.
Some liquids should not be placed in stainless steel water cups. For example, make tea with stainless steel water cups, placing oil, salt sauce and vinegar, etc. It is easy to precipitate heavy metals.
Stainless steel water cups should not make tea
Many people like to make tea with stainless steel insulation cups, which is harmful.The stainless steel water cup contains chromium, which is a heavy metal. The corrosive stainless steel water cup is released because the protective film is destroyed, and the chromium will be released. If it is continuously used, it will cause damage to the human body.Chromium is a kind of blue and white multi -price metal element, commonly available in two -valent chromium, three -priced chromium and hexavalent chromium.Hard and crispy, anti -corrosion, so it is mostly used for stainless steel and other products.Clinically, the harm of hexavalent chromium and its compounds to the human body is usually manifested in three aspects.The first is to damage the skin and cause dermatitis, pharyngitis, etc.; The second is to damage the respiratory system and cause diseases such as pneumonia and bronchitis.ulcer.Excessive intake of hexavalent chromium can also cause renal failure and even cancer.
The worse the quality of stainless steel products, the easier it is to be corroded
The quality of the stainless steel water cup is good or bad, and the worse the quality of the stainless steel cup, the easier it is to be corroded.So how do ordinary people judge the quality of stainless steel products in daily life?With an ordinary magnet, you can also distinguish the quality of stainless steel.If the magnetic properties of stainless steel products are strong, it proves that it is almost pure iron. Since it is iron and the appearance is so bright, it means that it is an electroplating product, not a real stainless steel.The real stainless steel products also contain iron, and it is a little magnetic, but the magnetism is relatively weak.This is because the iron content is relatively small. On the other hand, after the surface is coated, it has the characteristics of preventing magneticity.First prepare a lemon and pour the lemon juice on the surface of the stainless steel products.After 10 minutes, dry the lemon juice. If it leaves obvious traces on the surface of stainless steel products, it means that the quality of stainless steel products is not good and easily corroded, thereby release chromium harm to human health.

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