Laboratory Studies of Potassium-Halide-Induced High-Temperature Corrosion of Superheater Steels. Part 1: Exposures in Dry Air

2015 ◽  
Vol 29 (2) ◽  
pp. 1186-1195 ◽  
Author(s):  
Hao Wu ◽  
Patrik Yrjas ◽  
Mikko Hupa
Keyword(s):  
High Temperature ◽  
High Temperature Corrosion ◽  
Laboratory Studies ◽  
Dry Air ◽  
Potassium Halide

The High-Temperature Corrosion of Fe-Cr-Mo Alloy by Co-Firing of Coal and Biomass

2011 ◽  
Vol 311-313 ◽  
pp. 1555-1558
Author(s):  
Chia Chieh Wei ◽  
Chaur Jeng Wang ◽  
Horng Yih Liou ◽  
Kuo Ming Chen
Keyword(s):  
High Temperature ◽  
Power Plant ◽  
Weight Change ◽  
High Temperature Corrosion ◽  
Coal Power Plant ◽  
Dry Air ◽  
Coal Power ◽  
Co2 Release

Co-firing of biomass and coal has drawn many attentions because it can reduce the amount of CO2 release of the coal power plant/incinerator. However, the higher amount of sulfur, chlorine, potassium and calcium in biomass could lead to a more serious corrosion. In this study, the high-temperature corrosion of Fe-Cr-Mo alloy at 400 °C to 600 °C in co-firing of biomass and coal was performed. The results show that the weight change of specimen tested in co-firing of biomass and coal is 1.7 to 2.4 times of that for specimen tested in dry air. Also, the weight change of specimen tested in co-firing increased with the tested temperature and time increased. For the specimen tested in co-firing with different ratio of biomass/coal, the weight change of specimen increased with the ratio of biomass/coal increased.

Development of a Coal Ash Corrosivity Index for High Temperature Corrosion

1987 ◽  
Vol 109 (4) ◽  
pp. 299-305 ◽  
Author(s):  
Jun-Ichi Shigeta ◽  
Yoshio Hamao ◽  
Hiroshi Aoki ◽  
Ichiro Kajigaya
Keyword(s):  
High Temperature ◽  
Steam Generator ◽  
Power Plants ◽  
Coal Ash ◽  
High Temperature Corrosion ◽  
Laboratory Studies ◽  
Current Development ◽  
Corrosion Rates ◽  
Steam Generator Tubes ◽  
Good Agreement

Current development of Advanced Steam Cycle coal-fired power plants requires superheater and reheater tubing alloys which can withstand severe conditions for high temperature corrosion. A corrosion equation to predict corrosion rates for candidate alloys has been developed by a study of deposits removed from steam generator tubes and from test probes installed in a boiler, supplemented by laboratory studies using synthetic coal ash. The corrosion equation predicts corrosion for a particular coal as a function of its content of sulfur, acid-soluble alkalies, and acid-soluble aklaline earths. Good agreement was obtained between the corrosion equation and 6000-hour tests using probes of TP347H and 17-14 CuMo.

NICROFER 5520 Co

Alloy Digest ◽  
1995 ◽  
Vol 44 (3) ◽  
Keyword(s):  
High Temperature ◽  
Chemical Composition ◽  
Physical Properties ◽  
Tensile Properties ◽  
High Temperatures ◽  
Heat Treating ◽  
High Temperature Corrosion ◽  
Creep Properties ◽  
Nickel Chromium ◽  
Temperature Performance

Abstract NICROFER 5520 Co is a nickel-chromium-cobalt-molybdenum alloy with excellent strength and creep properties up to high temperatures. Due to its balanced chemical composition the alloy shows outstanding resistance to high temperature corrosion in the form of oxidation and carburization. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: Ni-480. Producer or source: VDM Technologies Corporation.

INCOLOY ALLOY 890

Alloy Digest ◽  
2003 ◽  
Vol 52 (8) ◽  
Keyword(s):  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
High Temperature Corrosion ◽  
Temperature Performance ◽  
Incoloy Alloy

Abstract Alloy 890 provides improved properties over those of Incoloy alloys 800HT and 803 via the addition of silicon and molybdenum to optimize the performance of the alloy. Alloy 890 is typically 43% Ni, 25% Cr, 1.85 Si, 1.5% Mo, and 0.45% Nb, with the balance being principally iron. The alloy offers a significant improvement in resistance to high-temperature corrosion. This datasheet provides information on composition, physical properties, and tensile properties as well as creep. It also includes information on high temperature performance as well as forming, heat treating, and joining. Filing Code: Ni-611. Producer or source: Special Metals Corporation.

INCONEL ALLOY 671

Alloy Digest ◽  
1972 ◽  
Vol 21 (10) ◽  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Surface Treatment ◽  
Heat Treating ◽  
High Temperature Corrosion ◽  
Chromium Alloy ◽  
Inconel Alloy ◽  
Nickel Chromium ◽  
Temperature Performance

Abstract INCONEL ALLOY 671 is a nickel-chromium alloy having excellent resistance to high-temperature corrosion. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ni-180. Producer or source: Huntington Alloy Products Division, An INCO Company.

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