ã€China Aluminum Industry Network】 1. Brush Plating Equipment and Solutions: The special power supply is the main equipment for brush plating and adopts a DC power supply with stepless voltage regulation. The commonly used voltage range is 0-50V. The plating pen is the main tool for brush plating and consists of a handle and an anode. The anode is the working part of the plating pen, graphite and platinum alloys are the ideal insoluble anode materials, but the graphite is used in many applications. The platinum-iridium alloy is used only when the anode size is too small to use graphite. The graphite anode is wrapped with a cotton wool wrap, the role of which is to store the electroplating solution, to prevent the contact between the two poles to produce the surface of the arc burned parts and to prevent the anode graphite particles from falling off to contaminate the electroplating solution. The shape of the graphite anode depends on the surface shape of the part being plated. The plating solution, depending on the application, has a top surface treatment solution, a deposition metal solution, a descaling solution, and the like. (1) Surface top treatment solution: In order to improve the bonding strength between the plating layer and the substrate, the surface to be plated must be strictly pretreated, including electrocleaning treatment and activation treatment, so there is an electrocleaning solution and an activating solution. Electrocleaning: Electrolysis is used to remove oil stains and impurities on the metal surface of parts. The electrocleaning solution is a colorless and transparent alkaline solution, does not freeze at -10°C, and can be stored for a long period of time, with low corrosiveness. After the parts are cleaned, rinse with clean water. Activating solution: The method of electrolysis to remove the oxide film on the metal surface of the part is called activation treatment. The purpose is to expose the surface of the part to metallic luster and create conditions for the combination of the plating layer and the base metal. (2) Deposited metal solution: Brush plating solution is generally divided into two major categories of acidic and alkaline. The acidic solution is deposited 1.5 to 3 times faster than the alkaline solution, but most of the acidic solution is not suitable for loose metal materials such as cast iron, nor is it suitable for metal materials that are not resistant to acid corrosion such as tin and zinc. Alkaline and neutral plating solutions have good performance and can be used to obtain fine-grained coatings with good throwing power at corners, slits, and blind holes, and are non-corrosive. Material parts are plated. (3) Deplating solution: It is used to remove plating on the surface without plating, and mainly removes chromium, copper, iron, cobalt, nickel, zinc and other plating layers. II. Brush Plating Process (1) Preparation of Part Surfaces: The pretreatment of the part surface is the key process to ensure the bonding strength between the coating and the part surface. The surface of the parts should be smooth and free of oil, rust, and oxide films. To do this, clean with a wire brush and acetone, and then perform electric net treatment and activation treatment. (2) Primer layer (transition layer): In order to further improve the binding force between the working plating layer and the metal matrix of the part, special nickel, alkali copper, etc. are selected as the bottom layer, and the thickness is generally 2 μm to 5 μm. The desired metal plating, ie the working plating, is then plated on it. (3) Plating Working Plating: The thickness (radial direction) of the plating of the brush plating is 0.3 mm to 0.5 mm. The increase in the plating thickness increases the internal stress, which can easily cause cracks and reduce the bonding strength, and even the plating off. However, in order to compensate for the wear size of parts, a larger thickness is required, and a combined plating should be used. The substrate is first plated on the surface of the part and then plated with a plating of a compensated size. In order to avoid the increase in stress due to over-stretching of the ribs, coarsening of crystal grains, and reduction of deposition rate, a sandwich coating (not more than 0.05 mm) is plated between the size platings, and later the working plating is plated. III. Features (1) Electroplating bath, simple equipment, not limited by the size of the parts; (2) Simplification of electroplating process, such as: no need for dressing and insulation; (3) Many types of plating: uniform and uneven plating; (4) The deposition rate is fast, which is 10 to 15 times that of slot plating. Save energy and man hours. (5) Generally do not process after plating, the thickness of the coating can be controlled. 4. Application of electrical equipment ----- all kinds of motor rotors, bearing positions of the motor end caps; various types of hoist spindle bearings; various types of fan spindle bearings on-site repair; emulsified pumps, air compressor crankshaft wear; Coal washing equipment, vibrating screen spindle, bearing position failure, running circle, roller bearing position, gear box bearing position repair, such as: crankshaft, roll, watts, plunger, cylinder, oil pump, hydraulic motor, cylinder liner , Chrome rod, gear keyway, rotor bearing repair and on-site repair, all kinds of different materials, different shapes of mechanical parts broken, cracked, scratched, worn, sealed, plugging. Flange, pipes, valves, etc. do not stop with pressure seal, plugging. Printing Machinery Germany: (Roland, Heidelberg); Japan: (Komori, Mitsubishi, Fuji, Yoshiaki, Hamada); Taiwan: (New); Domestic: (Northern), such as: roller, bite, care Tips, ink rolls, plate holes, tooth row bars, open plates, cams, gears, splints, dental plate cores and other printing press parts wear, crush, fracture, crack, corrosion repair and on-site dismantling. Auto Parts----Crankshaft sealing position of various imported domestic cars wears and tears, the crankshaft is used in the crankshaft bite due to oil blockage caused by lack of oil, the engine cylinder block crankshaft position burn box deformation, each The sealing position of the fittings, wear or breakage of bearings, etc., can be repaired as new, and can increase the life. Papermaking Machinery ---- papermaking machine drying cylinders, rubber roller shafts, upper press bars, beater shafts, felt sticks, cage bearings, ZBJ13/φ150 slurry pumps, pulp thrusters, ZBJ2Q1φ100 slurry pumps, steamers, Blade cutters, cyclone dust collectors, calenders, various types of motor bearings, end caps and other surface scratches, corrosion and wear size overhaul repair. Hydraulic equipment----Restoration of pumps, plungers, valve cores, etc. in hydraulic and pressure systems----Restoration of parts of various types of hydraulic systems of casting machines, such as repair and refurbishment of hydraulic plungers, etc. Class parts with the bit, such as bearing position, sealing position. Cement equipment ---- all kinds of crusher spindle bearing position; moving E Cheng Kong; various types of conveying fan spindle (such as Roots blower); various types of motor rotor bearing position; mill, reducer gear shaft bearing position; The rotary surface of the reamer, the surface treatment, abrasion, breaking, cracking, and corrosion of the tower base, the bulkhead, and the lining plate's scouring surface to enhance the life, etc., can be repaired on site! Die parts ---- damage, pulls, corners, bumps, pits, etc. of various types of molds lead to mold failure, the mold does not anneal after repair, no undercut, no deformation, high bonding strength! Textile machinery ----Cylindrical shaft bearing position of textile machinery, Roller shaft bearing position is not disassembled and repaired, Slender shaft of wool spinning machine, Repair of non-ferrous metal parts. Strengthen the aluminum inner sleeve on the textile refueler, repair the cotton roller and the cotton floor ditch, and repair the rib ribs of the crimper. Iron and steel metallurgy equipment ---- equipment in mines, coal mines, petroleum, and metallurgy departments all work in harsh environments, resulting in serious wear and corrosion, and the professional site is not dismantled. The main equipment has the following reasons: 1 relatively large 2 expensive 3 loading and unloading difficulties 4 maintenance and repair workload.