The process is named after British metallurgist Sherard Osborn Cowper-Coles (son of naval inventor Cowper Phipps Coles) who invented and patented the method c.
[1][2][3][4] This process involves heating the steel parts up to c. 500 °C in a closed rotating drum that contains metallic zinc dust and possibly an inert filler, such as sand.
It is reported that pipes up to 6 m in length for the oil industry are sherardised.
The process is hydrogen-free, hence hydrogen embrittlement is prevented.
Guidelines and recommendations for the protection against corrosion of iron and steel in structures.