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Stainless steel sink why can rust
One, stainless steel sink why can rust?
Why is stainless steel rust? When the stainless steel tube surface of brown rust (point) when, people sense of surprise: "stainless steel is not rusty, rust is stainless steel, may be steel had the problem". In fact, this is a one-sided view of the lack of understanding of stainless steel. Stainless steel will be rusty under certain conditions.
Stainless steel has the ability to resist atmospheric oxidation --- that is not rust, but also has the ability to corrosion in the medium containing acid, alkali, salt, namely, corrosion resistance. But the size of its ability to resist the corrosion of the steel with its own chemical composition, mutual status, conditions and the ambient medium type change. Such as the 304 steel pipe, in the clean and dry air, absolutely excellent corrosion resistance, but will move it to the waterfront area, contains a lot of salt sea fog, will soon rust; and 316 steel pipe good behavior. Therefore, not any kind of stainless steel, can in any environment corrosion, no rust.
Stainless steel is formed on the surface of a thin layer and of the fine solid stable chromium rich oxide film (protective film), to prevent the continued infiltration of oxygen atoms to continue to oxidation and corrosion resistance ability. Once there are some reasons, this film was constantly destroyed, air or liquid oxygen atoms will continuous infiltration or metal atoms of iron continuous evolution out of the loose formation of iron oxide, metal surface is subject to constant corrosion. This form of surface film is a lot of damage, the daily life of more than a few of the following:
1. Stainless steel surface of the product containing other metals or dust particles heterogeneous metal attachments, in the humid air, attachment and stainless steel condensation water, two connected a micro battery, causing the electrochemical reaction, the protective film is damaged, the electrochemical corrosion.
2. Stainless steel surface adhesion of organic juice (such as vegetables, sputum, etc.) in a water oxygen formed organic acid, long time of organic acid on the surface of metal corrosion.
3. Stainless steel surface adhesion containing acid, alkali, salt material (such as wall decoration of lye, stone gray water splash), caused by localized corrosion.
4 in polluted air (such as the atmosphere containing a large amount of sulfide, oxidation of carbon, nitrogen oxide), in case of condensation water to form sulfuric acid, nitric acid, acetic acid liquid chemical corrosion. Above can be caused by the corrosion of stainless steel surface protection film caused by corrosion. In order to ensure that the metal surface is permanently bright and not corroded, the following suggestions are put forward:
1, regular cleaning tank. Should be used in the room temperature and dry.
2, retention of water will lead to the occurrence of mineral deposits, this situation can be used in the low concentration of vinegar solution to remove this type of deposition, and finally clean water.
4, do not make the water droplets remain on the surface. High iron content of water may result in the formation of brown red marks on the surface
5. Don't put the low carbon steel or cast iron cooking utensils in the sink for a long time.
6, do not put rubber dishes, wet washing dishes or other cleaning pad placed in the sink.
7, containing chlorine components of household goods, bleach or food will hurt the sink.
8, even if is to be put in the cupboard, if will be equipped with bleaching agent or chemical detergent container open from wafting gases or vapors will cause harm to the sink.
9, if you do not carefully the photo or solder into the sink, should immediately rinse with water.
10, as little as possible use of silver containing detergent or other detergent containing sulfur or hydrochloric acid.
11, don't put mayonnaise, mustard, pickled cabbage or other salty foods long time placed in the sink.
12, do not use one hundred clean wire, abrasive or abrasive materials to clean the sink.
13, do not use cistern as chopping board. The sink should be used only for the purpose of which it should be used.
14, in the installation or interior decoration, do not be made of low carbon steel, metal or solid materials made of tools or other rusty objects placed in the sink.
15, not normal use, incorrect cleaning habits and impure water will cause harm to the sink.