... exposed to temperatures in the 650-900°C range in marine atmospheres, can be subject to accelerated corrosion beneath a thin molten eutectic salt film consisting of sodium chloride and sodium sulfate. This type of corrosion (Type II hot corrosion) can eventually lead to engineering failure. Understanding...

... service (alloy SS304H) and examines the possible strategies for alloy upgrade in RFCC service. RFCC Hot Corrosion SS304H low melting-point eutectic INTRODUCTION Oman Oil Refineries and Petroleum Industries Company (ORPIC) ^† is one of the largest government owned companies in the Sultanate...

...Abstract Aircraft engines, turbines, and industrial machinery operating at high temperatures near marine environments are prone to accelerated degradation of their components due to corrosion under a thin film of fused salt (“hot corrosion”). Typical salts formed under these conditions are sodium...

... operate at temperatures as low as 580°C, especially when fuels with high chlorine contents are used. ¹ These low melting alkali salts lead to a severe and fast form of corrosion of the underlying metallic alloy – hot corrosion. During this hot corrosion attack, the metal and metal oxides...

... selection for these critical boiler components. Of major importance in heavy liquid fuel-fired boilers is the hot corrosion phenomena provoked by the heavy concentrations of vanadium and sulfur in the fuel. Table 3 Chemical Composition of Corrosion Test Materials Fe Ni Cr Mo Ti Cu Co Others...

...Abstract The corrosion of metallic alloys underneath fused salt films - hot corrosion - is an important degradation problem in the internal components of aero-engines and in land-based marine and industrial turbines. Chromium is a key alloying element in defending against hot corrosion because...

... followed by polishing with 6 diamond paste using kerosene as the lapping liquid. Scanning electron microscopic (SEM) studies Abstract Sodium chloride (NaCl) is one of the prominent hot corrosion inducing constituents of salt deposits that accumulate on the alloy surface in the field. In a marine...

... but La based perovskite was not achieved which is possibly due to the fact that the reaction kinetics of the Mg based layer was much faster than the La based perovskite crystals. Molten Salt Stainless Steel Rare-earth oxide Hot Corrosion INTRODUCTION Molten salts are ideal candidates for heat...

...hot corrosion high-temperature alloys two-zone rig burner-rig INTRODUCTION Alkali sulfate deposits are formed during the combustion of many fossil-fuel fired systems operating particularly near the sea environment. When exposed to such deposits, the components used in these systems...

... firing black liquor, biomass fuels, blends of biomass with fossil fuels and municipal waste. Corrosion biomass boiler superheater alloy selection utility boiler recovery boiler renewable fuels fireside deposits ash molten salts hot corrosion INTRODUCTION Industrial boilers could, in principle...

... that the steels which have more chromium and nickel, are more resistant in relation to this effect or phenomenon, and have less absorption in comparison with other samples. Hot corrosion carburization oxidation carbon absorption heat resistant cast steels carbide phase INTRODUCTION Although atmospheres...

...* Corresponding Author: [email protected] EXPERIMENTAL PROCEDURES The nominal compositions of the alloys studied are summarized in Table 1 . Each of these alloys is an exclusive chromia-former except for N07214, which is an alumina-forming alloy. The burner-rig hot corrosion set-up...

...Hot corrosion is considered to be an irreversible auto-catalytic process ³ . Very small amounts of sulfur and sodium or potassium can produce sufficient Na₂SO₄ or K₂SO₄ to cause hot corrosion. For example, in a hot corrosion test, NASA uses 0.5...

...Hot corrosion alkali sulfate salt solid-solution strengthened alloys INTRODUCTION Alkali sulfate deposits are often present in the byproducts of combustion of many fossil-fuel fired systems. When exposed to such deposits the components used in these systems are prone to undergo accelerated...

...The surface properties of the alloy have been tested in different environments to evaluate the resistance to hot corrosion and oxidation in steam and air. The specified tensile requirements for UNS S31035 and average figures from tensile tests at room temperatures are presented in Table 3...

...-performance materials of construction are required. Nickel-base alloys have been shown to offer reliable service for long periods of time resulting in high product output and low lifetime costs. Nickel alloys Hot Corrosion High Temperature Oxidation Carburization Sulfidation Creep Stress Rupture Oil...

...MCrAlY aluminides thermal barrier coatings environmental barrier coatings superalloys ceramics hot corrosion water vapor coating processing interdiffusion alumina chromia INTRODUCTION Abstract High-temperature materials such as MCrAlY, aluminide, silicon-base environmental barrier...

... of high-temperature protective coatings with several corrosive species found in gas turbine and/or waste incinerator environments and offer some suggestions to improve the hot corrosion-resistance of protective, barrier coatings. MCrAlY aluminides thermal barrier coatings yttria-stabilized zirconia...

...Abstract Beyond high temperature oxidation, sulfidation and molten salt corrosion, corrosion from ash/salt deposits has also been a serious problem for industrial gas turbine components such as nozzle guide vanes and rotor blades. This study focuses on hot corrosion behaviors caused by ash...

...Abstract Salt-induced hot corrosion is an accelerated mode of degradation that is known to occur in various high temperature engineering applications, including marine gas turbines. In order to improve the life of hot-section superalloy components, they are often coated with an aluminide...