fouling corrosion report_condensedscript

FOULING & CORROSION

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 .

FOULING - Definition

FOULING - Effects

Increases thermal resistance Equipment depreciation Maintenance requires extra

manpower Lower returns to scale

FOULING – Types (Location) Shell-side fouling Tube-side fouling Rotor fouling Fin fouling

FOULING – Types (Cause)

Corrosion fouling Biofouling Chemical reaction fouling (ex.—

Coking) Particulate fouling Precipitation fouling (ex.—Scaling) Freezing fouling

Biofouling

Particulate fouling

FOULING - Causes

Suspended Solids Organic Contamination Iron and Manganese Corrosion Products Treatment Products Microbial Growth

FOULING – Causes (Build-up) Asymptotic fouling

Linear fouling

Falling rate fouling

CORROSION- Definition

gradual degradation of materials by chemical reaction with its environment

CORROSION- Definition

CORROSION - Effects

Contamination Blocked fluid flow Leakage

CORROSION – Mechanisms of Action

General or Uniform Pitting

CORROSION – Types (Causes)

Stress corrosion cracking Galvanic (electrical current)

corrosion:

CORROSION – Types

Crevice corrosion Intergranular corrosion

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

CORROSION - Causes

Solution to Fouling and Corrosion

Maintenance Acceptance

FOULING and Corrosion - Prevention

Knowledge Prediction