scholarly journals High Temperature Corrosion Behaviors of the Superheater Materials

2012 ◽  
Vol 36 ◽  
pp. 212-216 ◽  
Author(s):  
Wen-Wen Luo ◽  
Zong-De Liu ◽  
Yong-Tian Wang ◽  
Rong-Juan Yang
Keyword(s):  
High Temperature ◽  
High Temperature Corrosion ◽  
Corrosion Behaviors

scholarly journals High-Temperature Corrosion Behaviors of Structural Materials for Lead-Alloy-Cooled Fast Reactor Application

2021 ◽  
Vol 11 (5) ◽  
pp. 2349
Author(s):  
Seung Gi Lee ◽  
Yong-Hoon Shin ◽  
Jaeyeong Park ◽  
Il Soon Hwang
Keyword(s):  
High Temperature ◽  
Fast Reactor ◽  
Metal Substrate ◽  
High Temperature Corrosion ◽  
Lead Alloy ◽  
Oxygen Level ◽  
Parabolic Oxidation ◽  
Corrosion Behaviors ◽  
Reactor Application ◽  
Duplex Oxide

The corrosion of nuclear-grade steels in lead–bismuth eutectic (LBE) complicates the realization of high coolant temperatures. Corrosion tests of T91, HT9, and SS316L were performed in static cells at 600 °C for 2000 h at an oxygen level of 10−6 wt.%. The obtained corrosion surfaces of post-processed samples were characterized by several microscopy methods. Up to 1000 h, all the alloys exhibited an evolution of duplex oxide layers, which were spalled until 2000 h due to their increased thickness and decreased integrity. Following the spallation, a thin internal Cr-rich oxide layer was formed above the Cr-depleted zone for T91 and HT9. SS316L was penetrated by LBE down to 300 μm in severe cases. A comparison on the corrosion depths of the materials with regard to the parabolic oxidation law with abundant literature data suggests that it may lose its validity once the duplex layer is destroyed as it allows LBE to penetrate the metal substrate.

scholarly journals High Temperature Corrosion Behaviors of 20G Steel, Hastelloy C22 Alloy and C22 Laser Coating under Reducing Atmosphere with H2S

Coatings ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 617 ◽  
Author(s):  
Zongde Liu ◽  
Congcong Liu ◽  
Yuan Gao ◽  
Chao Zheng
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Manganese Oxides ◽  
Mass Gain ◽  
High Temperature Corrosion ◽  
Corrosion Products ◽  
Uniform Corrosion ◽  
Low Nox Combustion ◽  
Corrosion Behaviors ◽  
Laser Coating

High-temperature corrosion behaviors of 20G steel, Hastelloy C22 alloy and C22 laser coating was evaluated by corrosion mass gain measurements at 450 °C. The corrosive atmosphere is 0.2 vol% H2S–0.1 vol% O2–N2, which simulated the severe high-temperature corrosion environment occurred under low-NOx combustion in pulverized-coal furnaces. Experimental results showed that the corrosion resistance of the C22 laser coating and the C22 alloy was obviously better than 20G steel. Furthermore, it should be noted that the C22 laser coating fabricated in this study displayed a higher corrosion resistance than the commercial C22 alloy although they had the same chemical composition. The severe pitting corrosion was observed in 20G steel with the corrosion products consisting of FeS2, Fe2O3 and Fe3O4. The C22 alloy and C22 laser coating exhibited the uniform corrosion and their main corrosion products were NiS2, CrS and a small amount of chromium and manganese oxides.

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.

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