Stainless Steel Pipe Fittings Will Rust It?
Stainless steel pipe fittings, said first and why the rust is not easy
, and then say why the stainless steel will rust
Stainless steel is not easy to rust and stainless steel components have a great relationship. Stainless steel components in addition to iron, there are chrome, nickel, aluminum and silicon. Chromium content of stainless steel in general not be less than
12%, 18% or even higher. Steel after the addition of chromium and other elements can change the properties of steel, such as the case of the molecular structure of steel is more uniform, easier to produce in the steel surface oxide layer of dense
Object protective film, which greatly enhance the ability of corrosion-resistant stainless steel. So stainless steel resistant to fire, water, acid, alkali and corrosion of various solutions to it, does not rust. Scientists have discovered that steel
The more uniform the internal structure of various components of the more closely the links, the more difficult the invasion of corrosion, together with the surface has a layer of oxide protective film, like to wear armor steel
As natural is not easy to rust.
Why stainless steel is also rust? When the stainless steel surface of brown rust (points), people great surprise: that "Stainless steel is not rust, rust is not a stainless steel
May be a problem with steel. "Actually, this is a lack of understanding of the one-sided stainless steel misconceptions. Stainless steel under certain conditions will be rusty.
Stainless steel has the ability to resist atmospheric oxidation of stainless steel --- that is, but also with the acid, alkali and salt corrosion is the capacity of media --- that is corrosion resistance. However, the size of its corrosion resistance
Is the chemical composition as the steel itself, plus each state, the use conditions and environmental media type change. Such as 304 steel, in a clean dry atmosphere, it is absolutely excellent resistance to corrosion
Capacity, but will move it to the waterfront, contains a lot of salt in the sea mist, will soon be rusty; and 316 steel is good. Therefore, not any kind of stainless steel, at any
Have the capability under any corrosion, no rust.
Stainless steel 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, corrosion resistance can be obtained
Force. If there is some reason, this film was the constant destruction of air or liquid oxygen or metal will continue to penetrate the iron atoms in isolation of them continue to form a loose
Iron oxide, metal surface corrosion also be kept. This surface film in the form of destruction of many more common in daily life are the following categories:
1. Stainless steel surface deposit product with other metals containing dust particles or heterogeneous metal attachments, in humid air, condensation between fixtures and stainless steel water will allow the two together into
A micro-battery, causing electrochemical reaction, protective film is damaged, call it that electrochemical corrosion.
2.stainless steel pipe fittings adhesion 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.stainless steel pipe fittings adhesion containing 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.
by: hookah
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