TAPPI TIP 0425-09 PDF

Thermal spray coatings are now common on cast and steel yankee dryers. Of the yankee dryers with thermal spray coatings (TSC), approximately 90% are expected to be electric arc spray (EAS) applications. The EAS process uses cored wires that are formed by wrapping a metal sheath around powdered metals. Cored wires were developed in the US in 1954 and have been utilized for yankee dryer surface coatings since 1995. This Technical Information Paper (TIP) will only discuss cored wire thermal spray coating of yankee dryers.

Key points include an overview of the EAS process including key variables, project safety, quality control and long-term maintenance.