Actes du 3ème Colloque International sur la Corrosion et la Protection des Matériaux à Haute Température
J. Phys. IV France 03 (1993) C9-779-C9-786
Investigation of hot salt corrosion at a land-based gas turbine installationF. Starr, N. Wood1 and R. Robertson2
1 British Gas plc, Research and Technology, Gas Research Centre, Ashby Rd, Loughborough, U.K.
2 British Gas plc, St. Fergus Gas Terminal, Peterhead, Aberdeenshire, U.K.
Many natural gas-fuelled power plants will be situated close to the sea, where salt spray can result in fouling of compressors, and even hot salt corrosion of the turbine blading. This investigative work was carried out on corroded nimonic 108 blades, from one of British Gas's RB211 engines. It showed that the turbines had been running at too high temperature. This combined with the salt, had caused rapid corrosion of the leading edges and blade shrouds. Alterations to operating procedures, and the recommendation of more resistant coatings has alleviated the problem.
© EDP Sciences 1993