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    What is the classification of anti-corrosion grade C5?

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    | 2024-12-05|Return

    In 1998, the International Organization for Standardization (ISO) introduced ISO12944 (Corrosion Protection of Steel Structure Protective Coating Systems), which is an international common standard. ISO12944-2017 is a reference provided by the International Organization for Standardization for global anti-corrosion technicians and units.

    The atmospheric environment is divided into six levels of atmospheric corrosiveness:

    C1 has very low corrosiveness

    Low corrosiveness of C2

    C3 moderate corrosiveness

    C4 high corrosiveness

    C5 has very high corrosiveness

    CX extreme corrosiveness

    Immersion in water or buried in soil is classified into four levels:

    Im1 freshwater

    Im2 seawater or brackish water without cathodic protection

    Im3 soil

    Im4 seawater or brackish water with cathodic protection


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