Stainless steel can be used to make the inner liner of thermos water bottle, and also can be used to make water bottle. The stainless steel water bottle is made of iron chromium alloy and nickel and other metals. Generally, the metal components in the stainless steel water bottle will not dissolve in the water, but it can not be used to make tea. Making tea will corrode the protective layer of the stainless steel water bottle and lead to the dissolution of harmful substances. Therefore, only the correct use of stainless steel water bottle, will not cause harm to human body.
Is stainless steel water bottle harmful?
Stainless steel is made of iron chromium alloy mixed with nickel and other metals. Many elements in stainless steel are trace elements needed by human body, such as iron, manganese, etc. The water quality we drink, whether it is mineral water or tap water or well water, also contains trace elements. Under normal circumstances, we use stainless steel water bottle has a time limit. For example, holding water in a thermos bottle is only a few minutes to a few hours or even dozens of hours. According to the test results, the dissolution of metal components in such a time is very limited. Therefore, as long as it is used correctly, the stainless steel water bottle will do little harm to human body. In addition, we should also pay attention to the purchase of food grade stainless steel water bottles. The cheap stainless steel water bottles on the market are usually of poor quality. The following is a brief introduction to the material characteristics of stainless steel water bottle:
430 stainless steel (13-0): unable to resist oxidation caused by chemical substances in the air, oxidation (rust) will still occur due to unnatural factors after not using for a period of time.
304 stainless steel (18-8): resistant to chemical oxidation.
316 stainless steel (18-10): advanced products are made of 10% nickel to make them more durable and corrosion resistant. This stainless steel is called 18-10 stainless steel, which is "medical stainless steel". It has no metal ions precipitation, and it is a food grade stainless steel material meeting the standard.
Can you make tea in a stainless steel water bottle?
Many people like to use stainless steel water bottle to make tea. In fact, this is the wrong way. The stainless steel water bottle contains chromium, which is a kind of heavy metal. Making tea will corrode the protective layer of stainless steel water bottle. The corrosion of stainless steel water bottle because the protective film is damaged, chromium will be released, if continued to use will cause harm to the human body. Chromium is a kind of blue white multivalent metal element. There are bivalent chromium, trivalent chromium and hexavalent chromium. Hard and brittle, corrosion resistance, so it is mostly used in stainless steel and other products.
In clinical practice, the harm of hexavalent chromium and its compounds to human body is usually manifested in three aspects. One is to damage the skin, leading to dermatitis, pharyngitis and so on. Second, damage the respiratory system, causing pneumonia, tracheitis and other diseases. Third, damage to the digestive system, ingestion or even long-term contact with chromate, which is very easy to cause gastritis, gastric ulcer and intestinal ulcer. Excessive intake of hexavalent chromium can lead to renal failure and even cancer.