Stainless steel tableware generally contains chromium and nickel. Chromium is a material to prevent products from rusting, while nickel is a corrosion-resistant material. If inferior stainless steel tableware is used, or stainless steel tableware is used improperly, it may cause the harm of heavy metals to human health.

Chromium: chemical symbol Cr, simple substance is steel gray metal. The name of the element comes from Greek, which means "color", because all chromium compounds have colors. 1797 French chemist walker? (L.N.Vauquelin) discovered a new mineral in Siberian galena (chromite), and the chromium content obtained by carbon reduction in the following year was 0.0 1%, ranking 17.

There is no free chromium in nature, which mainly exists in chromite. In the periodic table of elements, it belongs to family ⅵ b, with atomic number 24 and atomic weight 5 1.99 1, and the common valence is +2, +3 and +6. The oxidation number is 6, 5, 4, 3, 2, 1, 1, ? 2, ? 4. It is the hardest metal.

Nickel: A metallic element, almost silvery white, hard, ductile and ferromagnetic. It is highly polished and corrosion resistant. Nickel belongs to the iron-loving element. It contains the highest nickel in the earth's core and is a natural nickel-iron alloy. In the crust, ferromagnesian rocks contain more nickel than silicoaluminous rocks, for example, the nickel content of peridotite is 1000 times that of granite, and that of gabbro is 80 times that of granite.

2017101October 27th, the list of carcinogens published by the International Agency for Research on Cancer of the World Health Organization was preliminarily sorted out for reference. Nickel compounds are included in the list of carcinogens.

Metallic cobalt, metallic nickel and alloy powder containing 66-67% nickel, 13- 16% chromium and 7% iron are implanted in the category 2B carcinogen list.

Extended data:

When using stainless steel products containing chromium and nickel, attention should be paid to:

1, do not use stainless steel tableware to hold strong acid or strong alkaline food for a long time to prevent the dissolution of metal elements such as chromium and nickel.

2, don't use stainless steel utensils to cook Chinese medicine. Because traditional Chinese medicine contains many alkaloids, organic acids and other components, especially under heating conditions, it is difficult to avoid a chemical reaction with it, which will invalidate the medicine and even produce more toxic chemicals.

3. Do not use strong alkali or strong oxidizing chemicals for cleaning. Stainless steel tableware material.

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