In numerous screen product, stainless steel screen because of its fight corrode, be able to bear high temperature, wear well wait for a performance to be loved extensively by people, today we will talk about the fight corrode performance of stainless steel screen product.
Stainless steel and stainless steel screen products have high corrosion resistance in corrosive media.Stainless steel, stainless steel screen products have resistance to air, water, acid, alkali solution or other corrosive effects of the media.
Metal corrosion is a common phenomenon.Metal in the electrolyte (acid, alkali, salt) solution or humid atmosphere, corrosion, this kind of corrosion is electrochemical corrosion.Electric currents are generated during the electrochemical corrosion process.Because the metal is in an aqueous solution, a small part of its surface atoms escape the metal and enter the electrolyte, making the metal negative charge.The water layer in direct contact with the metal has a positive charge, so the potential difference between the metal and the contact surface of the solution is called electrode potential.
When two metals are connected to each other and placed into an electrolyte solution, a battery is formed between them and an electric current is generated because the electrodes of the two metals are at different potentials.The metal with low electrode potential is the anode and will be corroded continuously, while the metal with high electrode potential is the cathode and will be protected.Similarly, in the same metal, if there are more than two different applications, it will also form a battery and cause corrosion.If ferrite and carburite of carbon steel z zh are etched in nitric acid and alcohol solution, ferrite will first be corroded because its electrode potential is lower than that of carburite.
It can be seen from the above that to improve the corrosion resistance of the metal, on the one hand, it is necessary to make the alloy as single as possible at room temperature, on the other hand, it is more important to improve the electrode potential of the alloy itself, so as to improve its resistance to electrochemical corrosion.
Adding certain amount of alloying elements such as chromium and nickel to the steel can improve its electrode potential.Due to the scarcity of nickel, chromium is a common alloying element which can significantly improve the electrode potential of steel matrix.
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Post time: Apr-17-2019