DM#

Damage Mechanism

DM#

Damage Mechanism

1

Sulfidation

33

885°F (475°C) Embrittlement

2

Wet H2S Damage (Blistering/HIC/SOHIC/SSC)

34

Softening (Spheroidization)

3

Creep / Stress Rupture

35

Reheat Cracking

4

High temp H2/H2S Corrosion

36

Sulfuric Acid Corrosion

5

Polythionic Acid Cracking

37

Hydrofluoric Acid Corrosion

6

Naphthenic Acid Corrosion

38

Flue Gas Dew Point Corrosion

7

Ammonium Bisulfide Corrosion

39

Dissimilar Metal Weld (DMW) Cracking

8

Ammonium Chloride Corrosion

40

Hydrogen Stress Cracking in HF

9

HCl Corrosion

41

Dealloying (Dezincification/ Denickelification)

10

High Temperature Hydrogen Attack

42

CO2 Corrosion

11

Oxidation

43

Corrosion Fatigue

12

Thermal Fatigue

44

Fuel Ash Corrosion

13

Sour Water Corrosion (acidic)

45

Amine Corrosion

14

Refractory Degradation

46

Corrosion Under Insulation (CUI)

15

Graphitization

47

Atmospheric Corrosion

16

Temper Embrittlement

48

Ammonia Stress Corrosion Cracking

17

Decarburization

49

Cooling Water Corrosion

18

Caustic Cracking

50

Boiler Water / Condensate Corrosion

19

Caustic Corrosion

51

Microbiologically Induced Corrosion (MIC)

20

Erosion / Erosion-Corrosion

52

Liquid Metal Embrittlement

21

Carbonate SCC

53

Galvanic Corrosion

22

Amine Cracking

54

Mechanical Fatigue

23

Chloride Stress Corrosion Cracking

55

Nitriding

24

Carburization

56

Vibration-Induced Fatigue

25

Hydrogen Embrittlement

57

Titanium Hydriding

27

Thermal Shock

58

Soil Corrosion

28

Cavitation

59

Metal Dusting

29

Graphitic Corrosion (see Dealloying)

60

Strain Aging

30

Short term Overheating – Stress Rupture

61

Steam Blanketing

31

Brittle Fracture

62

Phosphoric Acid Corrosion

32

Sigma Phase/ Chi Embrittlement

63

Phenol (carbolic acid) Corrosion