Effect of Zinc on the Sulphidation Reaction in Marine Gas Turbines

PDF

Authors
  1. Hollingshead, R.S.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
Metallurgical examination of turbine blades from a P&W FT-12 gas turbine showed that no degradation of the blades had occurred after 3500 hours of operation in a DDH 280 class destroyer. The blade surfaces were partially covered by a white deposit identified as ZnSO4. The source of the Zn is the zinc pigmented protective coating in the fuel tanks. Sulphidation of turbine blades was induced in the laboratory where it was found that in the majority of the tests the blades were completely oxidized after 16 - 90 hrs. However, with the addition of 2.5 or 5 percent ZnSO4 to the 90/10 Na2SO4/NaCl salt mixture, sulphidation was prevented. These results suggest that the presence of Zn in the fuel may have prevented the sulphidation process.
Report Number
DREA-80-2 —
Date of publication
15 Jun 1980
Number of Pages
31
DSTKIM No
80-02903
CANDIS No
90586
Format(s):
Document Image stored on Optical Disk;Originator's fiche received by DSIS

Permanent link

Document 1 of 1

Date modified: