11 Jun Materials and Manufacturing | Protection of cast steel coupler from corrosion by cold spray
Materials and Manufacturing
Protection of cast steel coupler from corrosion by cold spray
CRRC QINGDAO SIFANG ROLLING STOCK RESEARCH INSTITUTE CO.,LTD / CSIRO (Andrew Urban)
Couplers are the linkage between rail cars which allow for movement , with corrosion fatigue a common failure mechanism due to increased gross weight and length of freight trains. In response, cold spray is a metal coating technology that uses a supersonic jet to accelerate particles towards a substrate so that they deform and bond. This project investigated the use of cold spray to mitigate coupling cracking.
1 July 2018 to 30 September 2019
- The coating of zinc onto steel substrates using cold spray achieved all of the required parameters of speed of application, coating thickness, density, bond strength and corrosion performance.
- A key achievement of the project was the significant improvement in adhesion of the coating that was addressed as a variation to the project.
- The benefits of the cold spray process over other zinc coating methods is the density and consistency of the coating to provide corrosion protection.