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Fouling corrosion report_condensedscript

Date post: 25-Jun-2015
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FOULING & CORROSION
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Page 1: Fouling corrosion report_condensedscript

FOULING & CORROSION

Page 2: Fouling corrosion report_condensedscript

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 .

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FOULING - Definition

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FOULING - Effects

Increases thermal resistance Equipment depreciation Maintenance requires extra

manpower Lower returns to scale

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

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FOULING – Types (Cause)

Corrosion fouling Biofouling Chemical reaction fouling (ex.—

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

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Biofouling

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Particulate fouling

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FOULING - Causes

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

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FOULING – Causes (Build-up) Asymptotic fouling

Linear fouling

Falling rate fouling

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CORROSION- Definition

gradual degradation of materials by chemical reaction with its environment

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CORROSION- Definition

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CORROSION - Effects

Contamination Blocked fluid flow Leakage

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CORROSION – Mechanisms of Action

General or Uniform Pitting

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CORROSION – Types (Causes)

Stress corrosion cracking Galvanic (electrical current)

corrosion:

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CORROSION – Types

Crevice corrosion Intergranular corrosion

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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

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CORROSION - Causes

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Solution to Fouling and Corrosion

Maintenance Acceptance

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FOULING and Corrosion - Prevention

Knowledge Prediction


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