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INTRODUCTION

This global coatings systems guide has been published to assist in selecting theAmeron products/systems that comply with various environmental conditions, asdescribed in ISO 12944.

The systems table published here primarily reflects the individual systems whichcomply with the performance qualification “High” as defined by the ISO 12944. ISO12944 must be referenced to determine complete system definition.

We have also included a matrix which illustrates the ISO 12944 cross-over of systems tomore harsh environmental classifications, but with the consequential reduction to theperformance classifications “Medium” or “Low”, with their respective reduced typicaldurability’s of 5 to 15 years “medium” or 2 to 5 years “low”. A reduction in the degree ofsurface cleanliness will also result in less durability.

A more comprehensive ISO 12944 system selector is available on the Ameron globalwebsite at www.ameroncoatings.com. This online system selector includes globalvalue-added products/systems and also local product/system offerings. There is also aspecial tool to translate a specific micron designation to the corresponding dft in mils -simply put the cursor over the specified microns and the correct mils will be indicated.

INTRODUCTION

This global coatings systems guide has been published to assist in selecting the PPG Protective and Marine Coatings (PPG PMC) products/systems that comply with various environmental conditions, as described in ISO 12944.

The systems table published here primarily reflects the individual systems which comply with the performance qualification “High” as defined by the ISO 12944. ISO 12944 must be referenced to determine complete system definition.

We have also included a matrix which illustrates the ISO 12944 cross-over of systems to more harsh environmental classifications, but with the consequential reduction to the performance classifications “Medium” or “Low,” with their respective reduced typical durability’s of 5 to 15 years (medium) or 2 to 5 years (low). A reduction in the degree of surface cleanliness will also result in less durability.

ISO 12944 - 2 CLASSIFICATION OF ENVIRONMENTS

ISO 12944-2 provides tables of corrosion classes with typical environments for bothatmospheric and immersion conditions. These environments are to be interpreted as anindication of the circumstances that the coating system is designed to resist for extendedperiods. The approximate durability period is categorized as follows: 2 - 5 years “low”,5-15 years “medium” and 15 + years “high”.

The durability ranges provide an indication of the lifetime of the system before first majormaintenance is required. This is usually carried out when the coating system has reachedthe level of Ri3 as defined in ISO 4628-3 (1% of total surface area rusted).

NOTE : These durability ranges are not “guaranteed times”. They should be considered as atechnical consideration that can help to set up a corrosion protection maintenanceprogram. There are no rules to link the guarantee time to this durability range, nor is it theintention to do so.

Maintenance is often required on more frequent intervals, due to other influences thancorrosion; for example: wear and tear, fading, aesthetical reasons, contamination etc.

CORROSIONCLASSES Typical Exterior Environments Typical Interior Environments

C1 -Heated buildings with clean atmospheres eg.Offices, schools, shops, hotels

C2

Atmospheres with low level ofpollution. Mostly rural areas.

Unheated buildings where condensation mayoccur eg depots, warehouses, sports halls

C3

Urban and industrialatmospheres, moderate sulfurdioxide pollution. Coastal areaswith low salinity.

Production rooms with high humidity and someair pollution (food processing plants, laundries,breweries, diaries)

C4Industrial areas and coastalareas with moderate salinity.

Chemical plants, swimming pools, coastalshipyards.

C5-I

Industrial areas with highhumidity and aggressiveatmosphere.

Buildings or areas with almost permanentcondensation and high pollution

C5-M

Coastal and offshore areas withhigh salinity.

Buildings or areas with almost permanentcondensation and high pollution

AMERON SYSTEM RECOMMENDATIONS

Ameron system recommendations are based on the latest designs for laboratory corrosiontesting. These corrosion tests use more rigorous criteria than currently included in ISO12944 part 6. This type of testing provides more realistic expectations of coating systemperformance, specifically for higher corrosive environments and where high durabilitysystems are required. These test methods are accepted and have become standard in anumber of international and company specifications.

PPG PMC SYSTEM RECOMMENDATIONS

PPG PMC system recommendations are based on the latest designs for laboratory corrosion testing. These corrosion tests use more rigorous criteria than currently included in ISO 12944 part 6. This type of testing provides more realistic expectations of coating system performance, specifically for higher corrosive environments and where high durability systems are required. These test methods are accepted and have become standard in a number of international and company specifications.

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