uncoated condition. The three coatings that were evaluated were LDC-2E, MDC-150, and MDC-15OL. The LDC-2E coating is the product of a pack-cementation process. The MDC-150 coating is a platinum aluminide coating developed at Howmet, and MDC-15OL coating is a low sulfur platinum aluminide coating that was also developed at Howmet. CMSX-4@, and CMSX-lo@, Rene' N5@, and PWA 1484e alloys were evaluated. In general, the low sulfur alloys were more oxidation resistant than their production counterparts in both the uncoated and the coated states for all of the alloys evaluated. Reducing the amount of sulfur present in the nickel based alloys did increase the oxidation resistance especially at 1177°C (215O'F). All three coatings were effective at limiting alloy oxidation at 1093'C (2OOO'F) up to 2000 hours. Superalloys 2ooo Edited by TM.