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Construction methods for epoxy resin anti-corrosion treatment

2018-01-21 View Original

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Various types of tank anti-corrosion work, including fiberglass reinforcement anti-corrosion, anti-corrosion for acid and alkali tanks, wastewater tanks, neutralization tanks, oxidation tanks, pickling tanks, electrolysis cells; anti-corrosion using three layers of fabric and five coats of paint, epoxy resin coating, fiberglass reinforcement insulation layers; pipeline anti-corrosion, equipment anti-corrosion, storage tank anti-corrosion, tank car anti-corrosion, glass flake anti-corrosion, steel structure anti-corrosion, acid-resistant brick anti-corrosion, acid-resistant mortar anti-corrosion, granite anti-corrosion, and more! Fiberglass Reinforced Plastic anti-corrosion construction plan: I. Construction environment 1. The temperature of the construction environment should be between -15 and 30°C, with a relative humidity not exceeding 80%. When the construction environment temperature is below 10°C, heating measures should be taken to raise the temperature. 2. Before carrying out anti-corrosion construction, it is necessary to select an appropriate mixing ratio and construction methods through testing, based on factors such as the temperature and humidity of the construction environment, the raw materials used, and the characteristics of the work itself; only thereafter can large-scale construction proceed. 3. The construction site for anti-corrosion projects should be protected from wind and dust. During construction and maintenance, measures such as waterproofing, fire protection, and protection from exposure to sunlight should be taken. 4. During the construction of anti-corrosion works, it is not allowed to carry out concurrent construction with other types of work. II. Construction sequence for epoxy resin fiberglass reinforced plastic: Apply the base resin → Cure → Implement reinforcement measures → Lay glass fiber cloth to the specified number of layers → Cure and trim → Apply the topcoat resin → Cure. 3. Reinforcement measures: Reinforcement is necessary at corners, around pipes, at construction joints, and in areas with cracks. The method involves adding 1–2 layers of glass fiber cloth to these areas after applying the base layer; the specific laying method is described in 5.3.4. Laying glass fiber cloth: This project is constructed using the continuous hand-laying method. After applying the primer, glass fiber cloth is laid continuously up to the designed number of layers. 1. The glass cloth must be immersed in the prepared epoxy resin until it is completely saturated; afterwards, excess epoxy resin should be removed so that only 20–25% remains. 2. First, apply a uniform layer of primer, then lay the fiber-reinforced material on top; it must be pressed firmly to eliminate any bubbles. After that, apply another layer of paint, ensuring that the paint covers the surface completely. 3. After laying the lining, its quality should be inspected; if defects such as burrs, delamination, and bubbles are present, repairs should be carried out. 4. During laying, the overlap width of fiber reinforcement materials in the same layer should not be less than 50 mm. The principle for applying patches is roughly: start with flat areas, then larger surfaces ; Top first, then bottom; inside first, then outside ; Support the back wall first. 2. After the reinforcement layer has been applied, it should be cured for 24 hours, the surface should be trimmed, and then topcoat resin should be applied. 5. Quality inspection – Visual inspection: 1.1. Bubbles: Bubbles are allowed on the surface; their diameter may be up to 5 mm, and there should be no more than three bubbles per square meter with a diameter of 5 mm or less. 1.2. Cracks: There shall be no cracks on the surface with a depth of more than 0.5 mm, and no cracks on the surface of the reinforcement layer with a depth of more than 2 mm. 1.3. The surface should be smooth and flat. 1.4. The bond between the coating and the substrate should be strong, with no delamination, exposure of fibers, or agglomeration of epoxy resin. Issues such as foreign matter inclusion and significantly uneven color. 2. Inspection of curing degree 2.1. The surface of the lining should not feel sticky to the touch. 2.2. The sound produced by tapping the product with a hand or a coin should be clear and crisp. Effective ventilation measures must be taken during construction in areas where exhaust flow is poor, such as pipes. Three-fabric-five-oil fiberglass reinforcement plastic anti-corrosion is a type of anti-corrosion method using fiberglass reinforcement plastic resin/epoxy resin/unsaturated resin, glass fiber fabric, and various auxiliary materials, which are mixed evenly to apply a comprehensive coating on the surface to be protected (concrete or metal surfaces), thereby meeting the specified anti-corrosion standards. It can be manufactured according to the requirements of Party A, such as two layers of fabric with three coats of resin, two layers of fabric with three applications of coating, two layers of fabric with three layers of adhesive, etc. In other words, it involves three layers of glass fiber fabric and five coats of resin (epoxy resin, unsaturated polyester resin, vinyl ester resin, phenolic resin, furan resin, etc.). 1. Detailed procedures for the fiberglass-reinforced plastic anti-corrosion construction method using three layers of fabric and five layers of resin: (1) Epoxy resin lining: An anti-corrosive and waterproof lining is created by combining epoxy resin with glass fiber fabric. The methods include three layers of fabric and five coats of paint (also known as three layers of fabric and five applications, or three layers of fabric and five glues), two layers of fabric and four coats of paint (applications, glues), three layers of fabric and five coats of paint (applications, glues), four layers of fabric and six coats of paint (applications, glues), five layers of fabric and seven coats of paint (applications, glues), six layers of fabric and eight coats of paint (applications, glues), seven layers of fabric and nine coats of paint (applications, glues), eight layers of fabric and ten coats of paint (applications, glues), nine layers of fabric and eleven coats of paint (applications, glues), ten layers of fabric and twelve coats of paint (applications, glues), and so on (in general, the number of coats of paint/applications/glues is two more than the number of layers of fabric). (2) Apply 901 special resin externally on the epoxy resin lining: After a corrosion- and water-resistant lining is made from epoxy resin and glass fiber cloth, several coats of 901 special resin paint are applied. The methods include one fabric with three coats of oil (also known as one fabric with three applications of paint/ adhesive), two fabrics with four coats of oil (paint, adhesive), three fabrics with five coats of oil (paint, adhesive), four fabrics with six coats of oil (paint, adhesive), five fabrics with seven coats of oil (paint, adhesive), six fabrics with eight coats of oil (paint, adhesive), seven fabrics with nine coats of oil (paint, adhesive), eight fabrics with ten coats of oil (paint, adhesive), nine fabrics with eleven coats of oil (paint, adhesive), and ten fabrics with twelve coats of oil (paint, adhesive), and so on (in general, the number of coats of oil/paint/adhesive is two more than the number of layers of fabric). (3) 901 special resin lining: A ceramic glaze lining is made from 901 special resin combined with glass fiber cloth. The methods include one fabric with three coats of oil (also known as one fabric with three applications of paint/ adhesive), two fabrics with four coats of oil (paint, adhesive), three fabrics with five coats of oil (paint, adhesive), four fabrics with six coats of oil (paint, adhesive), five fabrics with seven coats of oil (paint, adhesive), six fabrics with eight coats of oil (paint, adhesive), seven fabrics with nine coats of oil (paint, adhesive), eight fabrics with ten coats of oil (paint, adhesive), nine fabrics with eleven coats of oil (paint, adhesive), and ten fabrics with twelve coats of oil (paint, adhesive), and so on (in general, the number of coats of oil/paint/adhesive is two more than the number of layers of fabric). 2. Performance characteristics of the three-fabric-five-oil fiberglass reinforced plastic anti-corrosion construction method: (1) It possesses excellent anti-corrosion properties, with high resistance to corrosion caused by acids, alkalis, salts, chemical solvents, and oils ; (2) It has good adhesion to the substrate, is highly wear-resistant and impact-resistant, possesses good integrity without cracking, and has a certain degree of elasticity ; (3) It can improve the strength and elastic modulus of the matrix ; Dust-proof, easy to clean, and long-lasting. (4) Increase the heat distortion temperature and low-temperature impact strength ; As required by the design, various acid-resistant, corrosion-proof sheet materials such as stone slabs and tiles, as well as other anti-corrosion materials, can be bonded to the fiberglass coating surface using resin mortar. (5) When used as a lining for the pool surface, it offers advantages such as long-term resistance to water immersion, low water permeability, strong adhesion, high resistance to water pressure, resistance to acid and alkali corrosion, anti-corrosion and anti-mold properties, being non-toxic and harmless, a long service life, easy installation, and no need for a protective layer. 3. Application scope of the three-fabric-five-oil fiberglass reinforced plastic anti-corrosion construction method: concrete treatment tanks, floors, and walls that need to be protected from corrosion by strong acids, strong bases, and chemical solvents ; Various steel containers ; Anti-corrosion treatment of surfaces such as the foundations of various metal equipment. It is widely applicable to facilities such as workshops, warehouses, storage tanks, walls, floors, and sewage treatment tanks in industries including pharmaceuticals, chemicals, machinery, light industry, electronics, power plants, battery factories, electroplating plants, aluminum factories, and metallurgical plants, where resistance to acids, alkalis, and salts is required.

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