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.


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA181795


Report Date : MAR 1987


Pagination or Media Count : 101


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