Spraying Knowledge for Stainless Steel Tank Equipment

Why Spray Stainless Steel Equipment?

• Resist corrosion in harsh environments
• Enhance wear resistance
• Improve chemical stability
• Maintain aesthetic appearance

Spray Coating Methods

1. Air Spraying:
   • Uses compressed air to atomize paint, suitable for general coating.
   • Commonly used for manual operations and small-scale projects.
2. Airless Spraying:
   • Employs high pressure (100–300 bar) to atomize paint without air.
   • Offers higher efficiency and thicker coatings, ideal for large surfaces.
3. Electrostatic Spraying:
   • Charges paint particles for better adhesion using 60kV+ voltage.
   • Reduces overspray and improves coating uniformity.
4. Specialized Spraying Techniques:
   • Arc Spraying: Melts wire materials with an electric arc for metal coatings.
   • Flame Spraying: Uses combustion flames to spray molten materials.
   • Plasma Spraying: Utilizes high-temperature plasma for ceramic/metal coatings.
   • Explosion Spraying: Produces dense, high-adhesion coatings via controlled explosions.

Spraying Process and Equipment

• Key Steps:
  1. Surface preparation (cleaning, sandblasting)
  2. Primer application
  3. Main coating spraying
  4. Curing/drying
• Essential Equipment:
  • Spray guns
  • Paint booths (dust-free workshops)
  • Paint supply systems
  • Curing ovens
  • Exhaust and waste treatment systems

Efficiency and Environmental Considerations

• Productivity Advantages:
  • High-speed application suitable for both manual and automated production.
  • Upper paint rate increased from 30–40% (air spraying) to 65–85% with low-pressure atomization.
• Environmental Challenges:
  • Paint mist and solvent vapors pose health and pollution risks.
  • Requires proper ventilation and waste treatment systems.

Application Scenarios

• Industries:
  • Chemical, pharmaceutical, food and beverage, marine, and aerospace.
• Equipment Types:
  • Reactors, storage tanks, filters, pipelines, and valves.

Safety Precautions

• Use explosion-proof equipment in flammable environments.
• Maintain safe distances (≥250mm) in electrostatic spraying to avoid spark discharge.
• Implement strict safety protocols in high-pressure airless spraying.