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Compressor Disk Corrosion: Problems and Solutions
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English
Abstract
Corrosion of the steel compressor disks of gas turbines is a serious problem. In this study, the causes of disk corrosion failure are reviewed; recommended protective coatings and lubricant films are described, and their interactions noted.
To evaluate these corrosion resistant coatings, five candidate coatings are described as well as three lubricant/antigallant films commonly used on disks or on blade roots in contact with disks. Results of comparative testing in environmental tests are described for the protective coatings with and without the presence of lubricant films. Data is presented graphically; optical and SEM photomicrographs are included.
It is shown that lubricants/antigallants can seriously degrade the performance of all protective coating systems unless great care is taken in selection. Further it is shown that sealed metallic/ceramic coatings provide superior corrosion protection when compared to other coating systems.
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Mosser, M., "Compressor Disk Corrosion: Problems and Solutions," SAE Technical Paper 890916, 1989, https://doi.org/10.4271/890916.Also In
References
- Mosser Mark F. “Recent Advances in Metallic/Ceramic Coatings for Corrosion Control in Military Applications,” taken from Proceedings of the 1987 Tri-Service Conference on Corrosion May 1987 259 278
- Mosser Mark F. “An Improved Coating Process for Steel Compressor Components - SermeTel Process 5380 DP” SAE Technical Paper 880879 ; Presented at the 24th Annual Aerospace/Airline Plating and Metal Finishing Forum and Exposition Phoenix, Arizona April 4-7 1988
- Mosser Mark F. McMordie Bruce G. “Evaluation of Aluminum Ceramic Coatings on Fasteners to Eliminate Galvanic Corrosion.” SAE Technical Paper 860112 , taken from SP-649, Corrosion: Coatings and Steels ; Presented at the SAE International Congress and Exposition Detroit, Michigan February 24-28 1986