Coupon Testing

Coupon testing involves placing a sample within a system. The sample is removed periodically for inspection and weight loss measurements. Coupon testing is a simple procedure but is often overlooked as it is an old and low technology method. However, coupons provide the most reliable evidence, whereby information on the forms and location of corrosion on the samples, the average rate of corrosion, and the corrosion byproducts can be obtained. The downfalls are that it is time consuming and does not provide real time data.