Fasteners are commonly used parts on mechanical equipment, and the usage rate is very high. Usually there are screws, nuts, bolts, rivets, etc., in order to ensure the safety of fasteners, we will have certain principles in the selection of materials , China Standard Parts Network, based on the knowledge of the use of fasteners, to share the commonly used stainless steel mat...
Nickel chloride is often used as an activator in passivation to promote the normal dissolution of the anode and to supplement the nickel ions consumed during the passivation process. In addition to providing chloride ions for activation, nickel chloride also supplements metallic nickel. However, the price of nickel chloride is high and the production cost is high. As the activa...
1. The principle of passivation treatment can be explained by film theory, that is, passivation is due to the interaction of metal and oxidizing medium, and a very thin (about 1nm), dense, covering performance will be formed on the metal surface during the action. A good passivation film that can be firmly attached to the metal surface. This film exists as a separate phase, ...
At present, there are more than 100 chemical elements known, and there are about 20 chemical elements that can be encountered in steel materials commonly used in industry. For the special steel series of stainless steel formed by people's long-term struggle with corrosion, there are more than a dozen elements commonly used. In addition to the basic element of steel, iron has...
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