Link to glossary of corrosion and materials maintenance terms

Corrosion engineering consultant

Corrosion Doctors site map

Alphabetical index of the Corrosion Doctors Web site

Corrosion Categories

Corrosion of common metals according to ISO 9223

When the time of wetness (TOW) falls in category four (T4)

Chloride

Sulfur dioxide

Steel

Copper & Zinc

Aluminum

S0 or S1 

P1

C3

C3

C3

..

P2

C4

C3-4

C3-4

..

P3

C5

C4-5

C4-5

S2

P1

C4

C4

C3-4

..

P2

C4

C4

C4

..

P3

C5

C5

C5

S3

P1

C5

C5

C5

..P2C5C5C5
..P3C5C5C5

Back to ISO 9223