Accession Number:

ADA181795

Title:

An Investigation of the Hot Corrosion Protectivity Behavior of Platinum Modified Aluminide Coatings on Nickel-Based Superalloys

Descriptive Note:

Master's thesis

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s):

• Malush, Rudolph E.

Report Date:

1987-03-01

Pagination or Media Count:

101.0

Abstract:

The adverse operating environments encountered by marine gas turbine components has necessitated the development of various protective coating systems. Diffusion aluminide coatings have been used successfully for many years to enhance the hot corrosion resistance of turbine blades and vanes. Recently, it has been found that by modifying these standard aluminide coatings with a thin platinum underlay, significant improvements in high temperature corrosion resistance can be achieved. Using a laboratory furnace specifically modified to reproduce hot corrosion attack morphologies, the effects of selected platinum- aluminide coating deposition variables were investigated on two nickel-base superalloy substrates. Keywords Turbines, Blades, Coatings, Platinum Aluminides, Chromium, Corrosion.

Descriptors:

• *CORROSION RESISTANCE
• *PROTECTIVE COATINGS
• *PLATINUM
• *NICKEL ALLOYS
• *SUPERALLOYS
• *ALUMINIDES
• CORROSION
• LIFE EXPECTANCY(SERVICE LIFE)
• HIGH TEMPERATURE
• ATTACK
• MORPHOLOGY
• THESES
• SUBSTRATES
• COATINGS
• GAS TURBINES
• TURBINE BLADES
• OXIDATION
• PROTECTION
• NAVAL RESEARCH
• THERMAL FATIGUE
• TURBINES
• THINNESS
• CHROMIUM
• TURBINE COMPONENTS
• COBALT ALLOYS
• BASE METAL
• CREEP STRENGTH
• DIFFUSION COATINGS
• MARINE ENGINES

Subject Categories:

• Coatings, Colorants and Finishes
• Metallurgy and Metallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE