Corrosion Classification Coupon

The coupon set measures the corrosion experienced by copper and silver during the exposure period. These results provide an indication of the corrosive conditions affecting sensitive metals and electronic equipment.

The standard coupon exposure period is 30 days. This provides a defined period for assessing the environmental corrosion rate and establishing a baseline classification.

Corrosion Classification Coupons are used for baseline ISA S71.04 classification assessment. The framework classifies atmospheric corrosivity based on the corrosion of copper and silver coupons over a defined exposure period.

A Corrosion Classification Coupon provides a 30-day exposure-based assessment of environmental corrosivity, while an Atmospheric Corrosivity Monitor provides real-time monitoring of atmospheric corrosion conditions. They serve different monitoring approaches and can complement each other.

They can be used in environments where atmospheric corrosion may affect sensitive equipment and electronics, including control rooms, DCS rooms, electrical rooms, data centres and industrial facilities.

Corrosive atmospheric conditions can affect components such as DCS I/O cards, PLCs, SCADA systems, relay contacts, VFD control boards, PCBs, UPS systems and instrumentation electronics. Establishing the corrosivity level helps provide a basis for evaluating the environmental risk to such equipment.