Steel temperature phospation technology

the characteristics of phosphating film: strong adhesion with the substrate metal, strong combination, dense porous, strong adsorption to the coatingTherefore, it can be used as the base of commonly used coatings, so that the phosphating layer and coating layer produce a strong binding force and corrosion resistanceIn atmospheric environment, after post-treatment, its corrosion resistance can be better than the black oxide protection layerGeneral steel cold squeeze, due to deformation caused by heating up to 300 degrees C far below the thermal boundary of the phosphating film, therefore, the phosphating film anti-heat adhesion goodIn the cold extrusion process, under certain temperature conditions, the phospanderfilm and lubricant (soap or emulsifier) react, some fatty acid soaps react with zinc phosphate Zn3 (Po4) 2 in the phospphosheaphobic membrane, resulting in highly lubricityd fatty acid zinc Zn (RCOO) 2, thus strengthening the lubrication effectPhosphated film has no adhesion to molten metal and can be used to prevent parts from sticking to molten metals with low melting pointsCan be used for local nitriding parts to prevent tin, but also can be used to avoid die-cast parts and mold bonding, reduce friction, avoid or reduce surface strain or crack pattern, thereby extending the life of the moldThe phosphated membrane layer also has high electroinsulation properties and can be used as an electrical insulation layer for silicon steel sheetsAfter phosption, the mechanical properties and magnetism of steel remain basically unchangedapplication range of normal temperature phosphating technology: 1, room temperature phosphating technology can be widely used on the inner surface of pipes, cylinders and complex steel parts, as well as the protective film layer on the surface of parts that are difficult to obtain by electrochemical methodsSuch as applied to the automotive industry, gears, radiators, brake tiles, fittings, tube cavities, screws, nuts and so onPetrochemical industry, pipelines, various valves, pump shells, bushings, blades and so on2, hardware, mold, machinery manufacturing industry, a variety of molds, metal decoration parts, washing machine shells, flats, measuring gear, electric fan blades, bicycle parts, sewing machine parts and so on3, weapons industry, bearings, guns, ship pumps, ship metal parts4, aerospace industry, bearing shaft neck, pistons, landing parts parts, seat frames, pillars and so on5, coating industry, increase the binding force of organic coatingthe advantages of the normal temperature phosphating technology: phosphating process according to the treatment temperature is different, there are high temperature, medium temperature, room temperature three processes high temperature phosphating is generally carried out at 90 degrees C to 98 degrees C The solution works at high temperature, the volatility is large, the composition changes quickly, the phosphide film is easy to mix sediment, the crystallization is uneven, and the energy consumption is extremely high Medium temperature phosphating is generally carried out at temperatures of 50 to 70 degrees C, the composition of the solution is more complex, and the energy consumption is high The normal temperature is carried out at 15 to 45 degrees C, generally does not need heating, energy saving, low cost, solution stability Low cost, per kilogram of concentrate in about 5 to 6 yuan, diluted after the cost of working liquid in 0 35 yuan /kg or so Solution is stable, adjustment and maintenance fluid is simple and convenient, long service life, working fluid can generally handle work up to 2000 square meters / ton, long clearance cycle, and can be large-scale continuous industrial production