1, stainless steel elbow mechanical polishing
Malleable Iron Pipe Fittings Supplier thinks mechanical polishing is divided into rough polishing and fine polishing. Rough polishing is done with felt on an electric polishing disc at a speed of 200-300 RPM. In the process of rough polishing, to be appropriate to sprinkle with a coarse chrome oxide, alumina or magnesium oxide polishing fluid, and keep the polishing cloth wet. In the rough polishing process to hold the sample, along the radial parabolic disc reciprocating motion, evenly adjust the pressure applied, pay attention to the pressure should not be too large. At the beginning of the polishing, from time to time to sprinkle some polishing fluid. After that, slowly reduce the pressure and reduce the concentration of polishing fluid until the polishing until the fine grinding marks disappear, smooth and bright without black spots. After the rough polished sample is washed with water, fine polishing is carried out to remove the abrasion marks left by rough polishing and make the polished surface bright and smooth. The polishing machine used for fine polishing is basically the same as the equipment used for rough polishing, and its rotational speed is 150-200 RPM.
2, stainless steel elbow chemical polishing
Chemical polishing is to allow the material in the chemical medium surface micro convex part of the concave part of the solution priority, so as to get a smooth surface. The main advantage of this method is that it does not need complex equipment, can polish the workpiece with complex shape, can polish many workpieces at the same time, high efficiency. The key problem of chemical polishing is the preparation of polishing fluid. The surface roughness obtained by chemical polishing is generally 10 m.
3, Stainless Steel Pipe Nipples solution polishing
The metal ions separated from the workpiece and the phosphoric acid in the polishing solution form a layer of phosphate film adsorbed on the workpiece surface. This kind of mucosa is thinner in the convex part and thicker in the concave part. Due to the high current density in the convex part, it dissolves quickly. The workpiece serves as the anode to be connected to the positive pole of the dc power supply. Using lead, stainless steel and other conductive materials resistant to electrolyte corrosion as cathode, connected to the negative pole of dc power supply. Both are a distance apart in the electrolyte (general with sulfuric acid, phosphoric acid as basic component), to a certain temperature, voltage, and current density (usually less than 1 / cm2), electricity time (generally for a few seconds to a few minutes), on the surface of a workpiece puffs part first dissolve, and gradually became smooth and shining surface.
