Phosphating technology of the hottest steel at roo

2022-08-09
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In the cold extrusion process of normal temperature phosphating technology for iron and steel, under certain temperature conditions, the phosphating film reacts with lubricants (soap solution or emulsifier), and some fatty acid soaps react with zinc phosphate zn3 (PO4) 2 in the phosphating film to produce fatty acid zinc Zn (rcoo) 2 with strong lubricity, thereby strengthening the lubrication. In the cold extrusion process, under certain temperature conditions, the phosphating film reacts with lubricants (soap solution or emulsifier), and some fatty acid soaps react with zinc phosphate zn3 (PO4) 2 in the phosphating film to produce fatty acid zinc Zn (rcoo) 2 with strong lubricity, thus strengthening the lubrication. Phosphating film has no adhesion to molten metal and can be used to prevent parts from adhering to molten metal with low melting point. It can be used for local nitriding parts to prevent tin contamination, and can also be used to avoid the bonding between die-casting parts and molds, reduce friction, and avoid or reduce the surface strain or crack lines, so as to prolong the service life of molds. Phosphating film also has high electrical insulation performance, which can be used as the electrical insulation layer of silicon steel sheet. After phosphating treatment, the mechanical properties and magnetism of steel remain basically unchanged

characteristics of phosphating film: strong adhesion to the base metal, firm combination, dense and porous, so that we can choose the right product according to your actual situation, and the coating has strong adsorption. Therefore, it can be used as the base of commonly used coatings to produce strong adhesion and corrosion resistance between phosphating layer and coating layer. In the atmospheric environment, after post-treatment, its corrosion resistance is better than the oxidation blackening protective layer. Generally, when steel is cold extruded, the temperature rise caused by deformation can reach 300 ℃, which is far below the thermal boundary of the phosphating film. Therefore, the phosphating film has good thermal adhesion resistance

application scope of normal temperature phosphating technology:

impact testing machines need to be used for automotive parts mainly include: rubber products on automobiles. 1. Normal temperature phosphating technology can be widely used on the inner surface of pipes, gas cylinders and steel parts with complex shapes, as well as on the surface of parts that are difficult to obtain protective coatings by electrochemical methods. For example, the Ministry of environmental protection issued the "technical policy for pollution prevention and control of titanium dioxide industry" in the automotive industry, gears, radiators, brake tiles, joints, lumen parts, screws, nuts, etc. Petrochemical industry, pipelines, various valves, pump casings, shaft sleeves, blades, etc

2, hardware, mold, machinery manufacturing industry, various molds, hardware decorative parts, washing machine casings, flat plates, measuring tools, electric fan blades, bicycle parts, sewing machine parts, etc

3, weapon industry, bearings, guns, ship pump bodies, ship metal parts, etc

10. Input power: 1 kw

4, aerospace industry, bearing journal, piston, landing parts, pedestal, strut, etc

5, coating industry, increase the adhesion of organic coatings

advantages of normal temperature phosphating technology: according to the treatment temperature, there are three processes: high temperature, medium temperature and normal temperature

high temperature phosphating is generally carried out at 90 ℃ ~ 98 ℃. Working at high temperature, the solution has large volatilization, rapid changes in composition, and the phosphating film is easy to be mixed with sediment, with uneven crystal thickness, and great energy consumption. Medium temperature phosphating is generally carried out at the temperature of 50 ~ 70 ℃, the composition of the solution is relatively complex, and the energy consumption is large. At room temperature, it is carried out at 15 ~ 45 ℃, generally without heating, saving energy, low cost and stable solution. The cost is low, about 5 ~ 6 yuan per kilogram of concentrated solution, and the cost of diluted working solution is about 0.35 yuan/kg. The solution is stable, the adjustment and maintenance of the working fluid is simple and convenient, and the service life is long. The working fluid can generally handle up to 2000 square meters/ton, the tank cleaning cycle is long, and it can be produced in large quantities in continuous industrial production

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