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Correct understanding of stainless steel kitchenware

2020-03-31 10:27:55 View:1605
Keywords:Stainless steelstainless steel potJida stainless steel products

Stainless steel is a kind of steel which is resistant to weak corrosive medium such as air, steam and water, and chemical diffuse corrosive medium such as acid, alkali and salt. It is made of ferrochrome alloy and some other trace elements. Because of its good metal performance and corrosion resistance compared with other metals, the utensils are beautiful and durable.

Real stainless steel products should last for hundreds of years without rusting. But the stainless steel we see on the market can still be rusted and corroded, but in general, the corrosion rate is very slow. Whether stainless steel is easy to rust, chromium is the key. The minimum chromium content of stainless steel in China should not be less than 12%. Due to the high proportion of chromium in stainless steel composition, its surface is always in passivation state (neutral and alkaline) in general, that is to say, it is protected by a tight protective film, so it will not rust. If the chromium content is low, i.e. poor stainless steel, its surface can not generate enough tight passivation film, which can not play a protective role, the stainless steel will still rust.

Another situation is that stainless steel encounters highly active substances (such as table salt in life), which contain high concentration or fluorine ions. Even for high-quality stainless steel with high chromium content, the passivation film on its surface will be damaged, making the surface of stainless steel in an active state. At this time, stainless steel will not only rust, but also dissolve heavy metal ions harmful to the body.

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The real high-quality stainless steel must be one price one goods, expensive has the reason. The authenticity of stainless steel can be identified by chemical method. In 100ml distilled water, add 8g of anhydrous copper sulfate, then add 3 drops of concentrated sulfuric acid, and drop the solution on the surface of stainless steel products for 6 minutes. The surface of real stainless steel products will not change, and a layer of red substance will be produced on the surface of unqualified products.

Jiangmen Jida stainless steel products Co., Ltd. is a high-tech enterprise which is committed to the research and development of stainless steel pot, production and manufacturing, export trade and independent brand sales. The products are exported to more than 100 countries and regions, such as Europe and the United States, with an annual sales volume of 15 million US dollars. It is one of the world's important suppliers of stainless steel products. Looking forward to cooperating with you!



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