FORMS OF DETERIORATION

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Presentation transcript:

FORMS OF DETERIORATION Rusting, Season Cracking, Waterline Attack, Crazing, Checking, Chalking

RUST

RUSTING

SEASON CRACKING

SEASON CRACKING

WATERLINE ATTACK

ACID WATER ATTACKS WALLS

CRAZING

CRAZING

CRAZING

SURFACE CRAZING

LOCALIZED CORROSION Pitting Corrosion,Crevice Corrosion,Oxygen Concentration Cell, Galvanic Corrosion, Intergranular Corrosion, Stress Corrosion Cracking, Liquid Metal Corrosion, Erosion, Impingement Corrosion, Corrosion Fatigue, Cavitation, Fretting Corrosion, Hydrogen Attack

PITTING CORROSION

PITTING CORROSION SHAPE

PITTING CORROSION

PITTING CORROSION

PITTING CORROSION

PITTING CORROSION

PITTING CORROSION

PITTING CORROSION – NH3

CREVICE CORROSION

CREVICE CORROSION

CREVICE CORROSION

CREVICE CORROSION

CREVICE CORROSION

CREVICE CORROSION

CREVICE CORROSION

OXYGEN CONCENTRATION CELL OF CARBON STEEL

OXYGEN CONCENTRATION CELL OF CARBON LOW STEEL

GALVANIC SERIES

GALVANIC CORROSION

GALVANIC CORROSION

GALVANIC CORROSION

GALVANIC CORROSION IN MARINE ENVIRONMENT

GALVANIC CORROSION

GALVANIC CORROSION

GALVANIC CORROSION

GALVANIC CORROSION

GALVANIC ISOLATER

INTERGRANULAR CORROSION

INTERGRANULAR CORROSION

INTERGRANULAR CORROSION

INTERGRANULAR CORROSION

INTERGRANULAR CORROSION

INTERGRANULAR CORROSION-WELD DECAY

STRESS CORROSION CRACKING

STRESS CORROSION CRACKING

STRESS CORROSION CRACKING

STRESS CORROSION CRACKING

STRESS CORROSION CRACKING

Liquid Metal Corrosion

Liquid Metal Corrosion

Liquid Metal Corrosion

A Drop of Liquid Metal

Gallium is Corrosive to the Aluminium

Erosion Corrosion in Elbow

Erosion Corrosion

Erosion Corrosion in Pipe Elbow

Erosion Corrosion in Turbine

Erosion Corrosion

Erosion Corrosion in Brass

Erosion Corrosion

Erosion Corrosion

Erosion Corrosion

Erosion Corrosion in Copper Piping System

Erosion corrosion

Impingement Corrosion

Impingement Corrosion by Flame

Corrosion Fatigue

Corrosion Fatigue in 316L Stainless Steel

Corrosion Fatigue

Corrosion Fatigue

Corrosion Fatigue of Copper

Corrosion Fatigue

Corrosion Fatigue Multiple Cracks

Cavitation and Erosion Corrosion

Cavitation-Erosion Corrosion

Cavitation Corrosion

Cavitation Corrosion

Cavitation Corrosion

Cavitation Corrosion

Cavitation Corrosion

Fretting Corrosion

Fretting Corrosion

Fretting Corrosion

Fretting Corrosion

Fretting Corrosion

Fretting Corrosion

Hydrogen Attack of a Boiler Tube

Hydrogen Attack

Hydrogen Attack

Hydrogen Attack

Hydrogen Attack

Hydrogen Attack

STRUCTURAL CORROSION Graphitic, Parting or Dealloying (Selective Leaching or Dezincification of Brass), Biological Corrosion

Graphitic Corrosion

Graphitic Corrosion

Graphitic Corrosion

Graphitic corrosion packing with corrosion inhibitor

Graphitic Corrosion

Graphitic Corrosion

Graphitic Corrosion

Dealloying-Selective Leaching

Dealloying

Dealloying

Dezincification

Dezincification

Dezincification

Dezincification

Dezincification

Dezincification

Dezincification

Dezincification

Dezincification

Biological Corrosion

Biological Corrosion

Biological Corrosion Bio-corroded surface of a carbon steel. The corroded surface shows the typical tubercles are due to the sulfate- reducing bacteria. Bacteria collect inside the tubercles and produce FeS. Biological corrosion is important also for Cu and Al alloys. The small marker at the right bottom of the image represents a length of 50 mikrons (0.05 mm).

Biological Corrosion

Biological Corrosion

Biological Corrosion

Biological Corrosion

Biological Corrosion in Wood

Biological Corrosion

Biological Corrosion

Biological Corrosion in Stone

Biological Corrosion