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Whether the stainless steel spoon is black is poisonous

Whether the stainless steel spoon is black is poisonous

E-BON E-BON 2018-03-05 11:33:04
Black stainless steel pots have not seen black OEM Stainless Steel Measuring Spoon spoons, but it is a similar phenomenon.

Stainless steel spoons on the market use different stainless steel. If 304 stainless steel is used, the corrosion resistance is good and the price is high. There are also spoons made of 410 stainless steel, 430 stainless steel and low end 200 series stainless steel. These spoon materials are everywhere, and they are seen everywhere on the stalls. The price on the supermarket shelves is cheap, and the corrosion resistance is not as good as 304 stainless steel.

Let's go back to the problem of blackening. There are two kinds of blackening.

Is a kind of high temperature cooking, such as stainless steel stick skewer barbecue(china Stainless Steel BBQ Series supplier), stick black out, this is the stainless steel elements such as high temperature oxidation of Fe CR. The use of clean ball or acetic acid can be removed. If a polishing tool is found, the polish can be restored to the new. The blackening of this way and analysis of its components, if it is the 400 series, should be the oxides of iron and chromium. Even if the trace enters the human body, it will not be harmful if it meets the acidic gastric juice and dissolves into the ionic state. If it is the 200 system, when it is oxidized at high temperature, it will produce oxides besides chromium and iron, and manganese oxides. If entering the body, a small amount will be fine. If there is much, it will be slightly toxic to the human body. Here is a description of the 200 series of stainless steel kettle boil water, it is no problem, because for tap water, its corrosion resistance is strong enough, will not let a lot of manganese precipitation, this is no impact on human beings, after all, trace manganese is also necessary for the human body.
Another kind of blackening should be the regular preservation of salt - containing foods, such as the stainless steel pots in the evening. The above-mentioned 430, 410 and low end 200 series stainless steels are sensitive to chloride or chloride ions, which will cause chloride corrosion and produce corrosion products on the surface, causing the material to discolor. The effects of the elements that have been corroded are similar to those of the above analysis, and the method of removing the black is similar.

Therefore, personal opinion:

When the spoon is black, if the 400 series Mixing Spoon China stainless steel is made, no problem, prevent corrosion and go deep and beautiful, remove the black; the low end 200 department is made, please be sure to remove the black.

In addition, not recommended 200 series stainless steel wok low-end, spatula.

Stainless steel containers made of 430, 410 and low end 200 systems do not recommend long term salt - containing food.