Coupons are a crucial instrument in corrosion prevention and cathodic protection. This steel is placed at a strategic location within the CP system. The coupon serves as a reference point for measuring the effectiveness of cathodic protection and evaluating the corrosion rate within the system.

Function of the coupon

The cathodic protection coupon has multiple functions within a corrosion prevention system:

• Reference for monitoring: By regularly measuring corrosion on the coupon, engineers can assess the level of corrosion within the system and evaluate the effectiveness of cathodic protection.
• Control of protection level: The coupon serves as a benchmark for checking the protection level provided by the cathodic protection systems. This helps identify areas where protection may be lacking.
• Quality assurance: By regularly checking corrosion on the coupon, companies can ensure the quality of their cathodic protection systems and correct any deviations in a timely manner.

How does it work?

The coupon is typically made from the same material as the structure being protected. This can be carbon steel, stainless steel, or another material, depending on the application. The coupon is then placed at a strategic location within the system, where it is subjected to the same environmental conditions as the rest of the structure. Periodic measurements are conducted on the coupon to determine the level of corrosion. These measurements can be performed using various techniques, such as weight loss measurements, electrochemical techniques, or visual inspection.

The use of cathodic protection coupons is vital for corrosion protection. By regularly monitoring corrosion on the coupons, companies can take proactive measures to prevent corrosion damage, extend the lifespan of their system, and reduce operational costs.

Ordering coupons

At Merrem & la Porte, we have different types of coupons available. For more information about coupons and how they can be integrated into your CP system, our team of specialists is ready to assist you.