Polished Stainless Steel Flat Bar

Polished Stainless Steel Flat Bar

Stainless steel flat bar has been widely used because of its high corrosion resistance and decoration, especially in medical appliances, food industry utensils, tableware, kitchen utensils and so on. Stainless steel flat bar appliances should be corrosion-resistant, shiny and clean, the surface...
Product description

Stainless steel flat bar has been widely used because of its high corrosion resistance and decoration, especially in medical appliances, food industry utensils, tableware, kitchen utensils and so on. Stainless steel flat bar appliances should be corrosion-resistant, shiny and clean, the surface of the appliance should not be attached to the human body toxic substances. Therefore, the requirements for the surface treatment of the production of such appliances are to completely eliminate the harmful substances on the surface.

Stainless steel flat bar polishing materials are generally required: "Polishing wax, hemp wheel, nylon wheel, cloth wheel, wind wheel, wire cloth wheel" and so on.


Oxidation Causes

Stainless steel flat bar in hot processing, mechanical processing or after a certain period of time its surface will form a layer of black or gray oxide, the main components of Cr2O3, NiO and very difficult to dissolve FeO、Cr2O3, their existence on one hand affect the appearance of quality, on the other hand also affect the use of products performance, Appropriate measures should therefore be taken to remove them. There have been a lot of reports on surface treatment of Stainless steel flat bar such as oxide skin removal and light decoration. As a mature surface treatment method, Stainless steel flat bar polishing has been widely used, which can further improve the corrosion resistance and luminous effect of Stainless steel flat bar.


Chemical Polishing

Chemical polishing is commonly used in Stainless steel flat bar surface treatment process, compared with the electrochemical polishing process, its greatest advantage is not the need for DC power supply and special fixture, can be polished shape complex parts, high productivity. In terms of functionality, chemical polishing in addition to the physical and chemical cleanliness of the surface, but also to remove the surface of the Stainless steel flat bar mechanical damage layer and stress layer, to obtain mechanical cleanliness of the surface, which is conducive to prevent parts of corrosion, improve mechanical strength, prolong the service life of parts. Since the beginning of the 40 in the early years of the patents on chemical polishing of Stainless steel flat bar, many formulations have been made public, but people still feel very difficult in practical application. Because Stainless steel flat bar variety, different grades of Stainless steel flat bar with different corrosion laws, it is not possible to adopt the same solution, so there are many types of Stainless steel flat bar chemical polishing solution.

The basic components of a chemical polishing solution include corrosive agents, oxidants, and water. Corrosive is the main ingredient, if the Stainless steel flat bar dissolved in the solution, polishing can not be carried out. Oxidants and additives can inhibit the process so that the reaction is in favor of the polishing direction. Water regulates the concentration of solution and facilitates the diffusion of reaction products. Whether the chemical polishing of Stainless steel flat bar can proceed smoothly depends on the reasonable coordination of the above ingredients.


Electrolytic Polishing

Stainless steel flat bar electrolytic Polishing is the Stainless steel flat bar products hanging on the anode, in the electrolytic polishing liquid anode electrolysis process. Electrolytic polishing is a special anode process, in the whole process of anode electrolysis polishing, the surface of Stainless steel flat bar products simultaneously carries on two contradictory processes, namely the continuous generation and dissolution of the metal surface oxide film. However, the surface of Stainless steel flat bar products and concave pits of chemical film into the blunt state of the condition is not the same, and due to the anodic dissolution, the anode zone metal salt concentration is increasing, on the surface of Stainless steel flat bar products to form a high resistivity of the thick layer of mucous membrane. The thickness of the thick mucous membrane on the surface of the product is different, and the micro-surface current of the anode is unevenly distributed. At the micro-bulge, the current density is large, and the dissolution is faster, which makes the surface burr or micro-convex of the product first dissolve and achieves leveling; The current density in the concave depression is small and the dissolution is slow. Because of the different distribution of current density, the surface of the product is continuously film and dissolved at different rates. The anode surface simultaneously carries on two opposite processes, the film and the Dissolution, the passivation film unceasing generation, the dissolution, causes the Stainless steel flat bar product surface to be leveling, achieves the highly smooth and the gloss appearance, satisfies the Stainless steel flat bar product surface polishing finishes the goal.


Attention

Grinding operation with sandpaper or abrasive belt is basically a polished cutting operation, on the surface of the steel leaves a very fine grain.

In the use of alumina as abrasive has encountered trouble, part of the reason is the pressure problem.

Any abrasive parts of the equipment, such as abrasive belts and grinding wheels, shall not be used for other non-Stainless steel flat bar materials before use. Because it will pollute the Stainless steel flat bar surface.

In order to ensure the consistency of surface processing, the new grinding wheel or belt should first be tested on the same scrap of ingredients to compare with the sample.

 


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