Will stainless steel fasteners rust? This is a concern for every customer who uses stainless steel fasteners! Most people may have problems. Should stainless steel fasteners not rust? My stainless steel pot has not rusted for many years. Perhaps the most typical one is the stainless steel kitchen knife used by my mother. Will stainless steel fasteners rust?
Scientific experiments have confirmed that stainless steel fasteners have the ability to resist atmospheric oxidation - that is, stainless steel also contains acid Alkali The corrosion resistance in salt media is corrosion resistance. But its corrosion resistance varies due to the chemical composition, mutual conditions, usage conditions, and environmental medium type of its stainless steel. For example, data from 304.316 shows excellent anti-corrosion ability in dry and clean air, but if moved to coastal areas, rust spots may appear in salt rich sea fog. Therefore, no stainless steel fastener can prevent corrosion and rust at any time.
Stainless steel fasteners are a very thin and stable chromium rich oxide film (protective film) composed of their appearance to prevent oxygen atoms from continuing to enter Continuously oxidize and acquire the ability to resist corrosion. However, for some reason, the membrane is constantly damaged, and oxygen atoms in air or liquid continue to enter or metal iron atoms continue to separate, forming loose iron oxide and rusting the appearance of the metal. The appearance of this film is damaged in many ways, usually more commonly during the day:
1. The appearance of stainless steel fasteners stores dust or attachments of different metal materials, which are rich in other metal elements. In humid air, condensed water between stainless steels connects the two into a micro battery, causing electrochemical reactions and damaging the protective film, known as electrochemical corrosion.
2. Organic juice adheres to the surface of stainless steel fasteners (such as melons and vegetables, noodle soup phlegm, etc.), forming organic acids under water and oxygen conditions, which can corrode the appearance of metals over time.
3. The surface adhesion of stainless steel fasteners is rich in acid Alkali Salt substances (such as alkaline water used for decorating walls) Localized corrosion is caused by lime water spraying.
4. Stainless steel fasteners in polluted air (rich in sulfides) Oxide The atmosphere of hydrogen oxide forms nitrate when it encounters condensed water Acetic acid droplets cause chemical corrosion.
In the above situation, the external protective film of stainless steel fasteners may be damaged Causing corrosion. Therefore, in order to ensure the long-lasting and bright appearance of stainless steel fasteners without rust spots, we need to:
① Regularly clean and wipe the appearance of decorative stainless steel fasteners, remove attachments, and eliminate corrosion caused by external factors.
② At present, there is a type of stainless steel fastener made of 201 and 202 raw materials on the market, which is not easy to use in coastal areas and is suitable for environments without industrial pollution and air corrosion.
③ Coastal areas generally use 304 stainless steel fasteners, 316 and other raw materials.
A2-70 bolt
Copyright © Shanghai ATM Precision Fasteneing Technology Co., Ltd. specializes in producing fasteners
and mechanical components made of alloy steel, stainless steel, special alloys, high-temperature alloys,
and other materials. Welcome to inquire!
沪ICP备11050003号
Shanghai Public Security Registration
No. 31011402010442
