Corrosion coupon testing

Mill test reports, identifying element compositions of materials used, are provided on all orders.

The simplest, and longest-established, method of estimating corrosion losses in plant and equipment is weight loss analysis. A weighed sample coupon of the metal or alloy under consideration is introduced into the process, and later removed after a reasonable time interval. The coupon is then cleaned of all corrosion product and is reweighed.

The weight loss is converted to a corrosion rate CR or metal loss ML , as follows:.

CORROSION COUPONS

The technique requires no complex equipment or procedures, merely an appropriately shaped coupon, a carrier for the coupon coupon holder , and a reliable means of removing corrosion product without disruption of the metal substrate. Weight loss measurement is still the most widely used means of determining corrosion loss, despite being the oldest method currently in use.


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Weight loss determination has a number of attractive features that account for its sustained popularity. The method is commonly used as a calibration standard for other means of corrosion monitoring, such as Linear Polarization and Electrical Resistance. In instances where slow response and averaged data are acceptable, weight loss monitoring is the preferred technique. Our Technician and experts can provide technical assistance at the request of customers.

CORROSION COUPON TEST ASSEMBLY

The weight loss is converted to a corrosion rate CR or metal loss ML , as follows: The technique requires no complex equipment or procedures, merely an appropriately shaped coupon, a carrier for the coupon coupon holder , and a reliable means of removing corrosion product without disruption of the metal substrate. Weight loss determination has a number of attractive features that account for its sustained popularity Simple - No sophisticated instrumentation is required to obtain a result.


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  • Direct - A direct measurement is obtained, with no theoretical assumptions or approximations. Our single-phase flow loops and immersion testing systems are ideal for laboratory testing.

    Coupon Ordering Information

    By-pass rigs can be used to allow easy monitoring of corrosion within existing piping systems. We can analyze your corrosion coupons on a per-batch basis, providing results within a few days of receiving the samples. In addition, our team of corrosion experts can work with you to understand the results, how they apply, and how you can improve your operations using that data. Samples are pre-weighed and packed in VCI bags to prevent weight change.