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Foshan Shunde polishing and passivation manufacturer

Foshan Shunde polishing and passivation manufacturer

source network release time: 01:48:01

the main methods of surface heat treatment adopted by Foshan Shunde polishing and passivation manufacturer include flame quenching and induction heating heat treatment. The common heat sources include oxyacetylene or oxypropane flame, induced current, laser and electron beam. Chemical heat treatment is a metal heat treatment process by changing the chemical composition, structure and properties of the surface layer of the workpiece. The difference between chemical non electromagnetic interference heat treatment and surface heat treatment is that the former changes the chemical composition of the surface layer of the workpiece

in order to recognize g. after the test, the illusion in the polishing and passivation failure of Foshan Shunde can be automatically archived and manually archived. Usually, a jump test should be carried out. For example, in the electroplating process of the above bicycle parts, the bright sulfuric acid copper plating process in the electroplating process should be skipped. The iron tile cover parts of the bicycle are not plated with bright copper, but directly placed in the bright nickel plating bath for electroplating, and the fault can be eliminated, It shows that the fault is caused by the bright copper plating process rather than the bright nickel plating. The identification of fault phenomenon can also be used for comparative test, that is, the method of using good solution to replace the solution that may have fault for comparative test

in the case of nickel plated and low tin plated bronze parts, after electrochemical degreasing and cleaning, and then weak corrosion activation with 5% - 10% sulfuric acid solution, and then cleaning chromium plating, it was found that the surface of chromium plating layer was white and flowery. When this fault was first encountered, the technician also made a jump test to skip the electrochemical degreasing process (this fault cannot be eliminated by the jump method), and the fault was eliminated at that time. People mistakenly think that the problem is caused by the electrochemical degreasing process, so they want to replace the degreasing solution

annealing is a heat treatment process for the purpose of obtaining uniform polishing and passivation of components, stable structure or excellent process performance. According to different purposes and requirements, annealing can be divided into homogenization annealing, recrystallization annealing, intermediate annealing and finished product annealing. Homogenization annealing is mainly carried out in aluminum alloy smelters

if the cooling rate of homogenization annealing is too fast, quenching effect may occur. In order to prevent the formation of quenching effect, it should be cooled with the furnace after annealing, or stacked together for air cooling after coming out of the furnace. Recrystallization annealing can eliminate crystal defects and work hardening caused by various plastic deformation, and improve the plasticity and toughness of products. The process of metal recrystallization is a process of nucleation and nuclear growth

incomplete annealing, polishing and passivation is to heat the alloy to an appropriate temperature below the critical point of phase transformation, and then cool it quickly (generally air cooling), so as to eliminate the effect of partial cold work hardening, so that the subsequent forming process with small deformation can be carried out, or the strengthening effect obtained by partial cold deformation (semi cold work hardening) should be retained while improving plasticity

the last process step in chemical cleaning is a key step, and its purpose is to prevent corrosion of materials. For example, after acid pickling, water washing and rinsing, the metal surface of the boiler is very clean, very activated and easy to be corroded, so passivation treatment must be carried out immediately to form a protective film on the cleaned metal surface to slow down corrosion. In the field of automatic control, there is also a special name channel passivation

salt mist resistance the polishing and passivation ability of polymer materials to resist salt mist erosion. Chlorides in salt fog, such as sodium chloride and magnesium chloride, have the property of rapid moisture absorption under very low humidity conditions. Salt mist resistance the ability of polymer materials to resist salt mist erosion. Chlorides in salt fog, such as sodium chloride and magnesium chloride, have the property of rapid moisture absorption under very low humidity conditions. Moreover, chloride ions have strong corrosive activity, resulting in strong corrosion and destruction of protective coatings and polymer materials

during the evaluation, it is characterized by simulating the salt fog and other factors in the marine atmosphere or the coastal atmosphere. An aqueous solution close to the composition of seawater is configured in the salt fog box, which is sprayed into a fog to fill the box, and the corrosion conditions are strengthened with temperature and humidity. The operating temperature is generally (35 ± 2)}:, sodium oxide solution concentration (5n1 5)} -, pH value 6.5---7.2, which is called neutral salt spray test, and sometimes acid salt spray is also used. The zigzag experiment process of the zigzag experiment machine needs to stop the spray cycle in a stable movement. There are two types of continuous spray or intermittent spray

aluminum alloy cleaning technology of polishing and passivation manufacturers mainly refers to the degreasing treatment of aluminum alloy. Degreasing is an important process in surface treatment. If the degreasing of aluminum alloy surface is not clean, the subsequent processing work will be difficult. The pollutants to be removed from the working surface include: various oil stains, residual polishing paste, hand prints, oil seals, surface waxes, etc. of aluminum alloy in the process of stamping, turning, milling, etc

chemical degreasing is used to remove invisible oil stains, surface dust, a small amount of antirust layer and a small amount of pollutants formed in the process of transportation or production. Chemical oil removal includes alkaline chemical oil removal and acid chemical oil removal. For aluminum alloy degreasing treatment, alkaline electrolytic degreasing is less used, because this type of treatment has a greater corrosive effect on metal, and the equipment investment is also large

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