Corrosion resistance classes – CRC

The corrosion resistance classes indicate the resistance of Festo components and products to external influences and ambient conditions.

CRC0

Very little or no protection for components not subject to corrosion stress such as

  • small, visually irrelevant standard parts

CRC1

Slight protection for components subject to low corrosion stress such as

  • transport and storage protection
  • Parts without primarily decorative surface requirements, such as in non-visible internal areas or behind coverings

CRC2

Medium protection for components subject to moderate corrosion stress such as

  • externally visible parts with primarily decorative surface requirements
  • Direct contact with a normal industrial environment or media such as coolants or lubricating agents

CRC3

Strong protection for components subject to high corrosion stress such as

  • external, visible parts in direct contact with a normal industrial environment or media such as solvents and cleaning agents
  • Primarily functional surface requirements

CRC4

Strong protection for components subject to extreme corrosion stress such as

  • parts exposed to aggressive media, e.g. in the food or chemical industry
  • Outdoor exposure under extreme corrosive conditions

These applications should be supported with special tests with the respective media when appropriate.