LARGE DIAMETER HEAVY WALL STAINLESS STEEL PIPE SUPPLIERS,MANUFACTURERS IN CHINA
Structure and Chemical Activity of Large Diameter Heavy Wall Stainless Steel Pipes
When the large diameter heavy wall steel pipe and the surrounding electrolyte solution contact, due to the electrochemical effect caused by corrosion is called electrochemical corrosion. The so-called electrochemical effect, that is, in the chemical reaction process produced a role in the current. This is due to the occurrence of current corrosion occurs that is electrochemical corrosion. It is more common than chemical corrosion. Generally speaking, large diameter thick-walled steel pipe electrochemical corrosion principle and large diameter thick-walled steel pipe is the same principle. Therefore, to understand the electrochemical corrosion, we must first learn the original battery theory and related knowledge.
First, large diameter heavy wall stainless steel pipe structure and its chemical lively
From the theory of modern atomic structure, it can be seen that the outermost electrons of large diameter heavy wall stainless steel pipe are few (1e, 2e, 3e), and these outermost electrons are easy to lose with the increase of atomic radius. When the electrons from the large diameter heavy wall stainless steel pipe off the plane, large diameter heavy wall stainless steel pipe atoms into a large diameter thick-walled steel tube cation, and when the electronic and large diameter thick-walled steel tube cation, it becomes a neutral Caliber thick-walled steel pipe.
The results of X-ray study on the structure of large diameter heavy wall stainless steel pipe show that all large diameter heavy wall steel tubes have crystal structure, and large diameter heavy wall stainless steel pipes are arranged on the lattice nodes of large diameter heavy stainless steel pipe cations. And in the original between the original and the existence of ions from the atoms off the electrons, these electrons are not fixed in a large diameter heavy wall stainless steel pipe lattice near the node, but in the whole character for continuous free movement, so Called free electrons. As a result of the movement of free electrons produced large diameter heavy wall stainless steel pipe keys, by means of large diameter stainless steel pipe keys, so that large diameter heavy wall stainless steel pipe atoms and cations are closely linked together to form a large diameter heavy wall stainless steel pipe crystal. As the large diameter heavy wall stainless steel pipe with the above structural characteristics, in particular the presence and movement of free electrons, large diameter heavy wall stainless steel pipe produced some common nature. Such as conduction, heat transfer, with ductility and so on. Manifested in the chemical nature, large diameter heavy wall stainless steel pipe atoms easily lost its valence electrons and become cations. So large diameter heavy wall stainless steel pipe is a reducing agent. Large diameter heavy wall steel pipe easier to lose electrons, the more the chemical nature of the more lively.
For example, we put a small piece of zinc into any kind of lead salt solution, you can see the zinc began to dissolve, and lead from the solution precipitation. E.g:
Zri + Pb (N03) 2 = Pb + Zn (N03) 2
Write the ion equation:
Zn + Pb ++ = Pb + Zn ++
Obviously, this is a typical oxidation-reduction reaction. The essence of the reaction is that the zinc atom gives the outermost electrons to the Pb ++ ions, which itself becomes Zn ++ ions into the solution; and the Pb ++ ions are combined with the electrons to become precipitated from the solution with large diameter heavy wall stainless steel pipes. If the opposite experiment, that is, a small piece of lead into the zinc salt roll, the results did not happen any reaction. This shows that zinc atoms are easier to lose electrons than lead atoms, while zinc ions are less likely to bind electrons than lead ions. That is, zinc is lively than lead.
When comparing lead and copper with the same method, it is found that lead is more active than copper, that is, lead can replace steel from its salt solution, and copper can not replace lead from its salt solution.
It can be seen, the three kinds of large diameter heavy wall stainless steel pipe – zinc, lead and copper, zinc is the most lively, most likely to lose electrons, lead times, the most lively copper. According to the above experiment, it can be determined that the large diameter heavy wall stainless steel pipe in the solution to replace the size of the capacity, that is, large diameter heavy wall stainless steel pipe lively size, and arranged in the following well-known sequence:
Large diameter heavy wall stainless steel pipe lively sequence table
K, Na, Ba, Ca, Mg, Al, Mn, Zn, Cr, Fe, Ni, Sn, Pb, H, Cu, Hg, Ag, Pt, Au
Large diameter heavy wall stainless steel pipe in the solution of the ability to lose electrons (large diameter heavy wall stainless steel pipe lively, reductive) fade
From this sequence table, we can summarize the following properties of the chemical properties of large diameter heavy wall stainless steel pipes:
1. Each large diameter heavy wall stainless steel pipe (including hydrogen) in the large diameter heavy wall stainless steel pipe can be used to replace the large diameter heavy wall stainless steel pipe located behind it from its salt solution.
2. Large diameter heavy wall stainless steel pipe in front of hydrogen can replace hydrogen from dilute acid, while large diameter heavy wall stainless steel pipes behind hydrogen can not.
3. In the sequence table, the more large diameter heavy wall stainless steel pipe in the front is more lively, the more likely it is to lose its electrons, and the ions are more difficult to combine with electrons and are reduced to large diameter heavy wall stainless steel pipes.
