Over the last decade, the oil and gas industry has significantly increased its use of pipelines with
an inner layer of corrosion resistant alloy (CRA), due to its ability to enhance fatigue corrosion
resistance. (Geveneux, 2010)
This CRA layer is relatively thin (within the 3 to 5 mm range), and is frequently used to line the
inner surface of carbon steel pipes in order to improve their chemical and mechanical properties.
CRA is either InconelÒ 625 or 825, Stainless Steel 316, Duplex or Super Duplex alloy.