Passivation process knowledge of carbon steel tee
The passivation process of carbon steel tee can actually be divided into many different kinds, and it can be commonly divided into two kinds. The compound generated on the general carbon steel is oxidized again, so that the etching continues to expand and the hole is formed for a lifetime.
The coating of carbon steel can be secured by coating with paint or oxidization-resistant metals, but, as is known, such protection is only a type of film. If the protective layer is damaged, the following steel will gradually begin to erode.
Passivation knowledge of carbon steel tee
The passivation effect of carbon steel tee is not only the key to the passivation process, but also the key to the stainless steel tee material itself, the actual influencing factors are the factors contained in the stainless steel tee, the overall structure of stainless steel, the processing of stainless steel, etc.
Among the constituent factors, chromium and nickel are the factors with strong passivation, followed by iron passivation, therefore, the higher the content of chromium and nickel, the stronger the passivation of stainless steel.
Martensitic and ferritic steel tee has a more symmetrical mechanism, which can be passivated well. Martensitic stainless steel has been strengthened by heat treatment and quenching, and its metallography is multi-component mechanism, so the passivation is not strong.
The bright surface passivation of carbon steel tee after machining is good, and the surface roughness of the products obtained by casting and sandblasting is not conducive to passivation.
Carbon steel tee is not prone to etch, pitting, etch or wear. One of the strongest materials of stainless steel or building metals.
And with this kind of raw materials that are used by people, as well as carbon steel tee, elbow and other things, whether in construction or machinery, there is no doubt its shadow, it is not difficult to see, I believe that one day China's steel technology will certainly be better and better.
Characteristics of carbon steel tee elements
The corrosion resistance of carbon steel tee depends on chromium, but because chromium is one of the components of steel, the protection method is not the same. This tightly adhered chromium-rich oxide protects the surface
Prevent further oxidation. This oxide layer is extremely thin, through which you can see the natural luster of the surface of the Three links, so that the Three links has a unique surface.
Moreover, if the surface layer is damaged, the exposed steel surface will react with the atmosphere to repair itself, re-forming this oxide "passivation film ", which continues to play a protective role. When the addition of chromium reaches 10.5%, the atmospheric corrosion resistance of equal diameter Three links increases significantly, but the chromium content is higher
Although still can improve corrosion resistance, but not obvious. The reason is that when the steel is alloyed with chromium, the type of surface oxide is changed to a surface oxide similar to that formed on pure chromium metal.
