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Fouling corrosion report_condensedscript

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Fouling corrosion report_condensedscript

  1. 1. FOULING & CORROSION
  2. 2. FOULING - Definition  Fouling is the aggregation and settling of insoluble material [suspended in the fluid through physical processes] into the surfaces of the equipment where the fluid flows .
  3. 3. FOULING - Definition
  4. 4. FOULING - Effects  Increases thermal resistance  Equipment depreciation  Maintenance requires extra manpower  Lower returns to scale
  5. 5. FOULING – Types (Location)  Shell-side fouling  Tube-side fouling  Rotor fouling  Fin fouling
  6. 6. FOULING – Types (Cause)  Corrosion fouling  Biofouling  Chemical reaction fouling (ex.—Coking)  Particulate fouling  Precipitation fouling (ex.—Scaling)  Freezing fouling
  7. 7. Biofouling
  8. 8. Particulate fouling
  9. 9. FOULING - Causes  Suspended Solids  Organic Contamination  Iron and Manganese  Corrosion Products  Treatment Products  Microbial Growth
  10. 10. FOULING – Causes (Build-up)  Asymptotic fouling  Linear fouling  Falling rate fouling
  11. 11. CORROSION- Definition  gradual degradation of materials by chemical reaction with its environment
  12. 12. CORROSION- Definition
  13. 13. CORROSION - Effects  Contamination  Blocked fluid flow  Leakage
  14. 14. CORROSION – Mechanisms of Action  General or Uniform  Pitting
  15. 15. CORROSION – Types (Causes)  Stress corrosion cracking  Galvanic (electrical current) corrosion:
  16. 16. CORROSION – Types  Crevice corrosion  Intergranular corrosion
  17. 17. CORROSION – Causes (factors)  fluid chemistry  fluid or metal temperature  fluid flow rate  material selection  metal working (forming or welding)  maintenance or cleaning frequency  fouling  film formation
  18. 18. CORROSION - Causes
  19. 19. Solution to Fouling and Corrosion  Maintenance  Acceptance
  20. 20. FOULING and Corrosion - Prevention  Knowledge  Prediction

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