Coupon 1 : A small metal strip which is exposed to corrosive systems for the purpose of determining nature and severity of corrosion or scale deposition. (SSWID)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}