scholarly journals History and Remained Subject on Standardized Corrosion Test Methods. V. High Temperature Corrosion Tests Their Historical Reviews and Technical Problems.

1996 ◽  
Vol 45 (12) ◽  
pp. 1346-1352
Author(s):  
Yoshio HARADA
Keyword(s):  
High Temperature ◽  
Corrosion Test ◽  
Test Methods ◽  
High Temperature Corrosion ◽  
Technical Problems ◽  
Corrosion Tests

High-Temperature Corrosion of Ni3Al+ 2.9%Cr Alloy in Ar-0.2%SO2 Gas

2018 ◽  
Vol 775 ◽  
pp. 441-447
Author(s):  
Dong Bok Lee ◽  
Min Jung Kim ◽  
Gyu Chul Cho ◽  
Soon Young Park ◽  
Poonam Yadav
Keyword(s):  
High Temperature ◽  
Corrosion Rate ◽  
Corrosion Behavior ◽  
Kirkendall Effect ◽  
High Temperature Corrosion ◽  
Scale Spallation ◽  
Corrosion Tests ◽  
Cooling Period ◽  
Corrosion Kinetics ◽  
Period 2

The high-temperature corrosion behavior of Ni3Al+2.9 wt% Cr alloy was studied in SO2-containing environment. Corrosion tests were carried out at 900, 1000, and 1100 °C for 100 h in atmospheric Ar-0.2% SO2 gas. The alloy corroded relatively slowly due mainly to formation of Al2O3 in the scale. Its corrosion kinetics deviated from the parabolic corrosion rate law to a certain extent owing to ensuing scale spallation. This was attributed to (1) stress generated during scaling and the subsequent cooling period, (2) voids that formed due to the Kirkendall effect, and (3) incorporation of sulfur in the scale. The scale that formed after corrosion at 900 °C consisted of the outer NiO scale, middle NiAl2O4 scale, and inner Al2O3 scale. The increased corrosion rate at 1000 and 1100 °C led to formation of the outer NiO scale, and inner Al2O3 scale.

Kinetics of Corrosion Processes of Alloy on the Intermetallic Phase Matrix FeAl in High Temperature in Air Atmosphere

2013 ◽  
Vol 212 ◽  
pp. 137-140 ◽  
Author(s):  
Janusz Cebulski ◽  
Stanisław Lalik
Keyword(s):  
High Temperature ◽  
Heat Resistance ◽  
High Temperatures ◽  
Intermetallic Phase ◽  
High Temperature Corrosion ◽  
Corrosion Products ◽  
Corrosion Tests ◽  
Air Atmosphere ◽  
Passive Oxides ◽  
Kinetics Of

The aim of this paper was to determine the resistance to high-temperature corrosion in atmosphere of air for alloy Fe-40Al-5Cr-0.2Ti-0.2B. Corrosion tests were conducted in temperatures from 600 to 900°C in time from 2 to 64 hours. Conducted tests have shown a slight increase of weight of samples in periods of time which followed. Increase of weight is connected with corrosion products in the form of passive oxides which form on the surface of the alloy. Kinetics of corrosion processes has parabolic course in tested temperature range which proves the formation of passive layers of corrosion products on the surface of samples. Heat resistance of the alloy on intermetallic phase matrix FeAl brings about potential possibilities to apply this alloy as a material meant for work in elevated and high temperatures in the environment which includes oxygen.

High Temperature Corrosion of Al3Ti-Cr Intermetallics in SO2 Atmosphere

2006 ◽  
Vol 15-17 ◽  
pp. 398-403
Author(s):  
Jee Hoon Choi ◽  
Dong Bok Lee
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Oxide Scale ◽  
Thermomechanical Treatment ◽  
Oxidation Reaction ◽  
Alumina Scale ◽  
High Temperature Corrosion ◽  
Induction Melting ◽  
Internal Corrosion ◽  
Corrosion Tests

L12-type Al65.5Ti24.4Cr10.1 alloys were prepared by induction melting followed by thermomechanical treatment. Corrosion tests were performed between 1173 and 1373 K in a flowing Ar-1% SO2 atmosphere for up to 150 hr. The corrosion proceeded mainly via the oxidation reaction. The oxide scale was primarily composed of Al2O3, together with a small amount of TiO2 that appeared mainly in the lower part of the oxide scale during the latter stages of corrosion. The formation of the highly stoichiometric, slowly growing alumina scale on the surface significantly improved the corrosion resistance of the alloys. Neither internal corrosion products nor sulfides were detected.

High Temperature Corrosion of Superheater Materials in Chlorination-Oxidation Atmosphere

2013 ◽  
Vol 718-720 ◽  
pp. 52-58
Author(s):  
Sheng Huan Sang ◽  
Yu Feng Duan ◽  
Hui Chao Chen ◽  
Chang Sui Zhao
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Unit Area ◽  
Mass Gain ◽  
High Temperature Corrosion ◽  
Corrosion Process ◽  
Waste Plastic ◽  
Corrosion Tests

Corrosion experiments were carried out with metals 20G, 15CrMoG and 12Cr1MoVG under the simulated atmosphere (N2-5%O2-1500μL/L HCl) of superheaters in waste plastic boilers to choose appropriate materials preventing high temperature corrosion. Corrosion dynamic curves were plotted by mass gain per unit area. Metal specimens after corrosion tests were analyzed by SEM-EDS and XRD. The results show that 20G has the poorest anti-corrosion abilities among the three materials; the corrosion process is involved in activation oxidation of chlorine. Addition of Cr in alloys can improve their corrosion resistance in the mixed atmosphere.

scholarly journals High-temperature corrosion behavior of TP91, C22 alloy and C22 based on laser coatings in simulated reducing corrosion environment

2021 ◽  
Author(s):  
CongCong Liu ◽  
Zongde Liu ◽  
Yuan Gao ◽  
Xinyu Wang ◽  
Chao Zheng
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Corrosion Behavior ◽  
Corrosive Medium ◽  
High Temperature Corrosion ◽  
Dense Layer ◽  
Corrosion Tests ◽  
The Matrix ◽  
Reducing Environment ◽  
Low Nitrogen

Abstract To explore corrosion characteristics of TP91, C22 alloy and C22 laser coatings in reducing environment caused by low-nitrogen combustion at 500°C-600°C, a synthetic corrosive medium containing 0.2 vol. % H2S-0.1 vol. % O2-N2 were selected. Results showed that the order of corrosion resistance is: C22 laser coatings>C22 alloy>TP91. 550°C was the limit corrosion temperature for C22 alloy and C22 laser coatings. The reason for the strong corrosion resistance of C22 alloy and C22 laser coatings is that a dense layer of Cr-rich corrosion products due to the is produced in the inner layer, thus protecting the matrix from direct corrosion by corrosive gas. Finer grains before corrosion tests and the formation of dense Cr2O3 inner layers in much speedier process were the main reasons for the best corrosion resistance of C22 laser coatings.

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