How to insulate and prevent corrosion of the hotte

2022-08-12
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How to insulate and prevent corrosion of cathodic electrophoresis tank

the electrophoresis tank is mostly welded from carbon steel plate. Due to the needs of electrophoresis process and corrosion prevention, the inner surface must be coated with FRP for insulation and corrosion prevention treatment. Otherwise, the inner wall of the tank or exposed metal will be painted during electrophoresis, which is very simple to paint, and the paint film will break down and dissolve without electrophoresis. In addition, the cathodic electrophoresis tank solution is acidic and corrosive to the tank body

the inner lining of electrophoresis tank is generally made of modified epoxy resin

before coating the lining, the steel plate realizes the customization of thermoplastic composite parts with affordable customers, rapid production speed and excellent product quality. The surface oxide layer must be removed on the near surface to make the material surface flat, burr free and expose the metal matrix; The roughness is 40 and 70UM to ensure excellent adhesion of the coating; Clean the foreign matters and grease on the inner surface of the tank, and blow and suck the treated surface and gap

the specific coating process and requirements are as follows:

1. Roll and brush the first primer without omission

2. Roll and brush the second primer, paste fiberglass cloth, quickly paste two layers, and use paint to penetrate the roll coating, and use a discharge tube to remove bubbles in the coating. The fiber cloth joint shall be overlapped and laid (generally 50mm is appropriate) to avoid coating falling off

3. At room temperature, glycine can be directly excreted from the body through urine or metabolized into carbon dioxide and solidified underwater for 24h

4. Check, trim, level and apply putty, and then repeat the above steps 2 and 3, with a total of more than 5 layers of cloth

5. Roll and brush the first surface coating

6. Cure at room temperature for H

7. Carefully grind and smooth the surface, and clean the grinding dust

8. For insulation inspection, the withstand voltage must be above 15000V, and the unqualified parts shall be repainted

9. After checking and repairing the pressure resistance, roll and brush the last coating

10, curing

coating standard, the total thickness of the coating is generally 3-6mm, the voltage resistance is above 15000V, the appearance is flat and smooth, the mechanical strength is high, and the solvent resistance is good

because the materials used contain flammable and explosive chemicals and solvents harmful to human body, how to prevent these two hazards is the focus of FRP construction safety work, which can be based on national standards

for fire protection, the materials shall be placed in a centralized manner and isolated with fire-proof cloth. After the construction is completed, the remaining materials shall be collected in time and placed in the material stacking area. Fire fighting equipment shall be arranged on site, dry powder fire extinguishers shall be placed, and sufficient sand and soil shall be stored around

personal protection provide special protective equipment for construction personnel and formulate a strict wearing system. Strictly stipulate the working hours of construction personnel, and prohibit long-time operation due to the rush period

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