Occurs from moisture associated with atmospheric conditions. Marine environments and moist polluted industrial environments with airborne contaminants are most severe.
Atmospheric Corrosion | Materials And Corrosion Control
Damage Mechanism |
Atmospheric Corrosion |
Damage Description |
· Occurs from moisture associated with atmospheric conditions. Marine environments and moist polluted industrial environments with airborne contaminants are most severe.
· Degradation or alteration of a material by contact with substances presents in the atmosphere, such as oxygen, carbon dioxide, water vapor, sulfur and chlorine compounds. · Dry rural environments cause very little corrosion |
Affected Materials |
· Carbon steel |
Control Methodology |
· Surface preparation and proper coating application are mandatory for long-term protection in corrosive environments.
· Prevent access of water and moisture. · Design to avoid trapping moisture in hollow sections, crevices or joints. |
Monitoring Techniques |
· Visual Inspection
· UT · OSI |
Inspection Frequency |
· Annually |
KPIs |
· Corrosion Rate: less than 5 mpy · Flow Velocity: not to exceed the maximum allowable flow velocity for the specified material |
Reference Resources (Standards/GIs/BPs) |
· API RP 571 (DM#20)
· API RP 581 · SAES-L-132 · SABP-A-018 · SABP-A-019 |
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