Decision help for corrosion classes

The corrosion class indicates the extent to which metal surfaces need to be protected against corrosion by impurity. The impact of the corrosion depends on the atmospherical circumstances of the environment where the object is being/will be used. Salt and humidity in the air, polluted atmosphere and impurities have an effect on the formation of corrosion. Atmospherical corrosion is divided up into the corrosion classes C1 to CX according to ISO 9223. For each class, a minimal and maximal corrosion speed has been determined. The corrosion class applies to both indoor and outdoor use of a metal. Aside from the corrosion classes, there are also four immersion classes for construction used underground or underwater. 

Show all Baril paint systems

C1.png

very low corrosivity > indoors
dry air and clean indoor climate

PAINT SYSTEMS STEEL C1/C2

     
C2.png low corrosivity > indoors and outdoors
unheated buildings and national dry areas
PAINT SYSTEMS STEEL C1/C2
     
C3.png

average corrosivity > indoors and outdoors
Production spaces with high humidity 
CITIES AND LIGHT INDUSTRIAL ENVIRONMENTS WITH MODERATE POLLUTION

PAINT SYSTEMS STEEL C3

     
C4.png

HIGH CORROSIVITY > indoors and outdoors
spaces with a very high humidity like swimming pools
light industrial environments with pollution, not near the coast

paint systems steel C4
paint systems galvanized steel C4

     
C5.png

very high corrosivity > outdoors
COASTAL AREAS AND AREAS WITH HEAVY INDUSTRY
A LOT OF POLLUTION AND HIGH HUMIDITY

paint systems steel C5
paint systems galvanized steel C5

     
CX.png

Extreme corrosiviTY > OUTDOORS
Marine AND offshore, VERY AGGRESSIVE ATMOSPHERE

Extreme HUMIDITY AND POLLUTION OF THE ENVIRONMENT

PAINT SYSTEMS STEEL CX

     
IM1.png

FRESH WATER
RivERS, WATER POWER PLANTS

PAINT SYSTEMS IMMERSION

     
IM2.png

SALT AND BRACKISH WATER 
WITHOUT CATHODIC PROTECTION
HARBORS AND LOCKS

PAINT SYSTEMS IMMERSION

     
IM3.png

underGROUND
Dam WALLS, PIPES AND tanks in THE GROUND

PAINT SYSTEMS IMMERSION

     
IM4.png

SALT AND BRACKISH WATER
WITH CATHODIC PROTECTION
HaRBORS AND LOCKS

paint systems immersion

C1.png
VERY LOW CORROSIVITY > INDOORS

DRY AIR AND CLEAN INDOOR CLIMATE
PAINT SYSTEMS STEEL C1/C2
 
 
 
C2.png
LOW CORROSIVITY > INDOORS AND OUTDOORS
UNHEATED BUILDINGS AND NATIONAL DRY AREAS
PAINT SYSTEMS STEEL C1/C2
 
 
 
C3.png
AVERAGE CORROSIVITY > INDOORS AND OUTDOORS
PRODUCTION SPACES WITH HIGH HUMIDITY CITIES AND LIGHT INDUSTRIAL ENVIRONMENTS WITH MODERATE POLLUTION
PAINT SYSTEMS STEEL C3
 
 
 
C4.png
HIGH CORROSIVITY > INDOORS AND OUTDOORS
SPACES WITH A VERY HIGH HUMIDITY LIKE SWIMMING POOLS
LIGHT INDUSTRIAL ENVIRONMENTS WITH POLLUTION, NOT NEAR THE COAST
PAINT SYSTEMS STEEL C4
PAINT SYSTEMS GALVANIZED STEEL C4
 
 
 
C5.png
VERY HIGH CORROSIVITY > OUTDOORS
COASTAL AREAS AND AREAS WITH HEAVY INDUSTRY
A LOT OF POLLUTION AND HIGH HUMIDITY
PAINT SYSTEMS STEEL C5
PAINT SYSTEMS GALVANIZED STEEL C5
 
 
 
CX.png
EXTREME CORROSIVITY > OUTDOORS
MARINE AND OFFSHORE, VERY AGGRESSIVE ATMOSPHERE
EXTREME HUMIDITY AND POLLUTION OF THE ENVIRONMENT
PAINT SYSTEMS STEEL CX
 
 
 
IM1.png
FRESH WATER
RIVERS, WATER POWER PLANTS
PAINT SYSTEMS IMMERSION
 
 
 
IM2.png
SALT AND BRACKISH WATER 
WITHOUT CATHODIC PROTECTION
HARBORS AND LOCKS
PAINT SYSTEMS IMMERSION
 
 
 
IM3.png
UNDERGROUND
DAM WALLS, PIPES AND TANKS IN THE GROUND
PAINT SYSTEMS IMMERSION
 
 
 
IM4.png
SALT AND BRACKISH WATER
WITH CATHODIC PROTECTION 
HARBORS AND LOCKS
PAINT SYSTEMS IMMERSION

MAINTENANCE PAINT SYSTEMS PAINT SYSTEMS FOR SHIPS NORSOK PAINT SYSTEMS

DurABILITY

ISO 12944 also describes the lifespan of a paint system. This is the time that it takes till the steel parts need a first big maintenance job. This standard durability is expressed in 4 ranges:

  • Low durability (L): up to 7 years
  • Medium durability (M): 7 to 15 years
  • High durability (H): 15 to 25 years
  • Very high durability (VH): more than 25 years