Link to glossary of corrosion and materials maintenance terms

Corrosion categories

Corrosion of common metals according to ISO 9223

When the time of wetness (TOW) falls in category two (T₂)

Chloride	Sulfur dioxide	Steel	Copper & Zinc	Aluminum
S₀ or S₁	P₁	C₁	C₁	C₁
..	P₂	C_1-2	C_1-2	C_1-2
..	P₃	C₂	C₂	C_3-4
S₂	P₁	C₂	C_1-2	C_2-3
..	P₂	C_2-3	C₂	C_3-4
..	P₃	C₃	C₃	C₄
S₃	P₁	C_3-4	C₃	C₄
..	P₂	C_3-4	C₃	C₄
..	P₃	C₄	C_3-4	C₄

Back to ISO 9223