Corrosion Coupons | Metal Samples - Alabama Specialty Products, …

Test coupons provide an inexpensive means of on-line monitoring that will allow you to effectively measure the corrosivity within your system. By observing the mils-per-year corrosion rate of an …

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FAQs about Corrosion Coupons | Metal Samples - Alabama Specialty Products, … Coupon?

What is a corrosion coupon?

Corrosion coupons are placed in a coupon rack. They are removed at set time intervals. Often the material of a corrosion coupon is stainless steel, copper, aluminum, carbon steel, admiralty brass, or galvanized steel. First set up a coupon rack on the recirculating loop in your water system. ...

What is corrosion coupon testing?

Corrosion coupon testing involves inserting the coupon into the water flow stream. This coupon’s weight is measured before and after. Corrosion coupons are placed in a coupon rack. They are removed at set time intervals. ...

How do you check if a coupon is corrosive?

Water should flow from the unattached end of the coupon toward the attachment end of the coupon. This reduces turbulence that can adversely affect the corrosion rate. Do not remove the coupons to look at them except at the end of the test period. Exposure to air, once the coupons are installed, can increase corrosion. ...

How are corrosion coupons measured?

Corrosion rates are measured in mils per year (MPY). To get the most accurate rating, coupons are exposed to treated water for 90 days. At that point, the coupons are removed, cleaned, and weighed to determine metal loss and corrosion rating. Are Corrosion Coupons Worth the Effort? ...

Should I use corrosion coupons or corrosion probes?

Overall, the choice between corrosion coupons and corrosion probes will depend on the specific application and the monitoring requirements. Corrosion coupons are a cost-effective way to monitor corrosion rates over a short period of time, while corrosion probes provide continuous monitoring and real-time data. ...

How does corrosion coupon analysis work?

Corrosion coupon analysis involves a number of variables which may significantly affect the results of the analysis. Make sure the design of the system and the installation of the coupon rack will produce accurate test results. Be careful not to touch the coupons. Oil from your hands will promote corrosion and bias the test results. ...