... blades 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...

... have a production capacity of 222,000 barrels of crude oil per stream day. Pipeline Corrosion well integrity materials and corrosion Downstream Oil & Gas flowline corrosion riser corrosion Subsurface Corrosion Sodium mechanism type ii hot corrosion low melting eutectic Publication...

... 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...

... ABSTRACT Sodium chloride (NaC1) is one of the prominent hot corrosion inducing constituents of salt deposits that accumulate on the alloy surface in the field. In a marine environment NaC1 is ingested into a gas turbine as an aerosol of sea salt along with intake air. At high temperatures...

... Effect of Long-Term Exposure on the Hot Corrosion Performance of High-Temperature Alloys V. P. Deodeshmukh and M. J. Newburn Haynes International, Inc. 1020 West Park Avenue, Kokomo, IN 46904-9013, USA [email protected] ABSTRACT Recent work by our group has shown that a relatively short...

... ABSTRACT ABSTRACT Hot corrosion found in a gas turbine engine environment is typically simulated using either a burner-rig or two-zone Dean-rig set up. In this paper, hot corrosion behavior of various wrought alloys was studied by the burner-rig test method, while examining in detail...

... ABSTRACT: Hot corrosion is an accelerated degradation (oxidation and/or sulfidation) of metals and alloys in the presence of liquid melts of salts and/or oxides. It's generally divided into two forms: Type I and Type II. Type I hot corrosion usually occurs at 850- 950 ºC (1550-1750 ºF...

... materials and corrosion oxidation ni-based alloy flowline corrosion riser corrosion resistance Subsurface Corrosion Thickness hot corrosion resistance Pipeline Corrosion coating salt deposit exposure hot corrosion hot-corrosion behavior type II cross-sectional sem image Weight...

... alloy substrate Sulfur materials and corrosion Subsurface Corrosion oxidation bond coat electrochemical society reaction interaction hot corrosion temperature coating FACTORS THAT INFLUENCE THE PERFORMANCE OF HIGH-TEMPERATURE COATINGS David A. Shifler, Ph.D., P.E. Undersea Weapons...

... ABSTRACT The effects of various pre-oxidation treatments on the Type II (i.e., 700°C) hot corrosion resistance of novel Pt+Hf-modified ¿'-Ni 3 Al + ¿-Ni alloys and coatings were studied and compared to a state-of-theart t-modified ß-NiAl coating. The pre-oxidation treatments were carried out...

... of the factors that influence the interaction 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. Keywords: MCrAlY, aluminides, thermal...

... ABSTRACT This study compares and ranks the low-temperature (i.e., 705°C/1300°F) hot corrosion resistance of CoCrAlY and Pt-modified CoAl coatings, together with Pt-modified â-NiAl coatings. A laboratory scale Dean rig was used to simulate the hot corrosion conditions. Coating performances...

... ABSTRACT Type I and II hot corrosion attack has been observed on certain marine gas turbine engines in different areas of the hot section turbine hardware. In order to improve the service life and resistance to hot corrosion of these turbine blades, laboratory testing of the current baseline...

... COMPARITIVE STUDY OF THE LOW- AND HIGH-TEMPERATURE HOT- CORROSION RESISTANCE OF VARIOUS ALUMINIDE COATINGS Vinay Deodeshmukh and Brian Gleeson Dept. Materials Science and Engineering 2220 Hoover Hall Iowa State University Ames, IA 50011-2300 Email: [email protected] ABSTRACT Salt-induced hot...

... examined. Metallographic examination showed that the coating thickness under the platform and in the curved area of transition between the platform to the blade stem was either very thin, or in a few cases, non-existent on each unfailed blade. Type II hot corrosion was evident at these locations under...

... ABSTRACT Type 1 and 2 hot corrosion attack has been observed on certain marine gas turbine engines in the area of the first stage turbine hardware. In order to improve the service life of these engines, laboratory testing of the current, baseline coating and several candidate replacement...

... magnitude and interactions, and (4) environmental interactions. In a hot corrosion environment, the absorption of corrosion products into the porous structure tends to cause premature fracture of the thermal barrier coatings. The paper discusses the historical and current understanding of thermal barrier...

... ABSTRACT During a recent high-temperature work, it was discovered that a high-temperature coating on a single crystal casting had completely failed after 1000 hours of exposure in a hot corrosion environment. Though previous tests showed this coating was somewhat resistant to hot corrosion...

... US government Downstream Oil & Gas Pipeline Corrosion riser corrosion test specimen exposure materials and corrosion well integrity original coating thickness hot corrosion resistance alloy 738 4 coating loss test pin alloy 738 penetration specimen substrate average coating...

... flowline corrosion US government metals & mining Subsurface Corrosion Pipeline Corrosion riser corrosion nickel-chromium alloy thermal stability diameter hot corrosion resistance alloy 690 chromium content precipitate Chromium materials and corrosion well integrity resistance...