Stainless Steel Pipe Will Rust
When the stainless steel pipe surface of brown rust (points)
, people great surprise: that "Stainless steel capillary pipe is not rust, and rust is not stainless steel pipe, and steel may be a problem." In fact, this is a lack of understanding of a stainless steel capillary pipe one-sided view of the error. Stainless steel pipe under certain conditions will be rusty.
Stainless steel capillary pipe are resistant to atmospheric oxidation capacity - that of stainless steel pipe, but also with the acid, alkali and salt corrosion is the capacity of the medium - that is corrosion resistance. However, the size of its corrosion resistance is the steel itself, with its chemical composition, plus each state, the use conditions and environmental media type change. Such as 304 steel, in a clean dry atmosphere, it is absolutely excellent anti-corrosion ability, but will move it to the waterfront, contains a lot of salt in the sea mist, will soon be rusty; the 316 is the performance of steel good. So it is not any kind of stainless steel capillary pipe and capability in any environment corrosion, no rust.
Stainless steel capillary is by its very thin surface layer of the solid stability of fine chromium-rich oxide film (protective film), to prevent the oxygen atoms to penetrate, to oxidation, and access to anti-corrosion ability. If there is some reason, this film was the constant destruction of air or liquid oxygen will continue to infiltrate or metal from the iron atom out of constant analysis, the formation of porous iron oxide, metal surface corrosion also be continuously . This surface film in the form of destruction of many more common in daily life are the following categories:
1. Stainless steel pipe surface deposit product with other metals containing dust particles or heterogeneous metal attachments, in humid air, condensation between fixtures and stainless steel capillary pipe water will allow the two together into a micro-battery, causing the electrochemical reaction , protective film is damaged, call it that electrochemical corrosion.
2. Metal surface organic juice (such as vegetables, soup, sputum, etc.), in the case of water oxygen to form organic acids, organic acids long is the corrosion on the metal surface.
3. Metal surface with acid, alkali, salts (such as wall decoration alkaline, lime water splash), causing localized corrosion.
4. Where air pollution (such as rich in sulfides, carbon dioxide, nitrous oxide in the atmosphere), case of condensation water to form sulfuric acid, nitric acid, acetic acid solution point, cause chemical corrosion.
Above the surface of stainless steel capillary pipe protective film may cause damage to cause corrosion. Therefore, to ensure a permanent shiny metal surface, not rusty, we recommend:
1. Must always be on the decorative stainless steel pipe scrub clean the surface, remove attachments, to eliminate the external factors that lead to modification.
2. To use 316 Stainless steel capillary pipe, 316 or resistant to seawater corrosion. 3. The market some of the chemical composition of stainless steel pipe can not meet appropriate national standards, reached less than 304 material requirements. So can cause rust, which requires users to carefully choose products from reputable manufacturers.
by: lydia00123
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