How To Deal With The Black Surface Of Stainless Steel?

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How to deal with the black surface of stainless steel

Toothpaste treatment: Squeeze some toothpaste on the black area of the stainless steel surface, and then wipe it back and forth with sandpaper. Under the action of friction, the black can be removed.

White vinegar treatment: Put the stainless steel item into the pot, then pour white vinegar and water, the capacity should exceed the stainless steel item itself, turn on the fire and heat for a period of time, let the white vinegar and the black part fully react, then take out the stainless steel item and let it stand for two days, the black part will fall off.
Cleaning powder treatment: Pour some water on the surface of the stainless steel, wipe it wet and sprinkle special cleaning powder, make sure that the black part is covered and wait for about 3 minutes, then wipe it with a scouring pad for a while, so that the black part will fall off.

What is the reason for the blackening of the surface of stainless steel

There is a protective film on the surface of stainless steel, which can prevent stainless steel from rusting and other problems. If the protective film is damaged, it will lose its protective effect, resulting in blackening, rusting and other problems.

If some elemental dust, particles, etc. are attached to the surface of the stainless steel, in the case of heavy humidity, the two will form a micro-battery effect, that is, an electrochemical reaction will occur, and the protective film will be destroyed at this time, causing the surface of the stainless steel to blacken and corrode.

If there are juices such as vegetables and noodle soup attached to the stainless steel surface for a long time, organic acids will be generated due to water and oxygen, and the protective film on the surface will also be corroded at this time. Similarly, when there are substances such as acids, alkalis, and salts attached to the surface, it will cause localized corrosion, resulting in blackening.

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