scholarly journals Summary of studies on hot corrosion of iron-based alloys by sodium sulfate in O2/SO2/SO3 environment

1993 ◽  
Vol 03 (C9) ◽  
pp. C9-319-C9-326 ◽  
Author(s):  
Yunshu Zhang ◽  
Weitao Wu
Keyword(s):  
Sodium Sulfate ◽  
Hot Corrosion ◽  
Iron Based ◽  
Corrosion Of Iron

scholarly journals Role of molybdenum in corrosion of iron-based alloys in contact with hydrogen sulfide containing solution

2016 ◽  
Vol 68 (6) ◽  
pp. 595-603 ◽  
Author(s):  
G. Genchev ◽  
C. Bosch ◽  
E. Wanzenberg ◽  
A. Erbe
Keyword(s):  
Hydrogen Sulfide ◽  
Iron Based ◽  
Corrosion Of Iron

Hot Corrosion of Iron in Molten Sulfate

CORROSION ◽  
1988 ◽  
Vol 44 (10) ◽  
pp. 724-731 ◽  
Author(s):  
H. Numata
Keyword(s):  
Hot Corrosion ◽  
Corrosion Of Iron

Cyclic Oxidation and Hot Corrosion Behavior of Nickel–Iron-Based Superalloy

2018 ◽  
Vol 37 (2) ◽  
pp. 173-180 ◽  
Author(s):  
D. Chellaganesh ◽  
M. Adam Khan ◽  
J. T. Winowlin Jappes ◽  
S. Sathiyanarayanan
Keyword(s):  
High Temperature ◽  
Corrosion Behavior ◽  
Hot Corrosion ◽  
Prolonged Exposure ◽  
Xrd Analysis ◽  
Mass Change ◽  
Temperature Oxidation ◽  
Turbine Engine ◽  
Nickel Iron ◽  
Iron Based

AbstractThe high temperature oxidation and hot corrosion behavior of nickel–iron-based superalloy are studied at 900 ° and 1000 °C. The significant role of alloying elements with respect to the exposed medium is studied in detail. The mass change per unit area was catastrophic for the samples exposed at 1000 °C and gradual increase in mass change was observed at 900 °C for both the environments. The exposed samples were further investigated with SEM, EDS and XRD analysis to study the metallurgical characteristics. The surface morphology has expressed the in situ nature of the alloy and its affinity toward the environment. The EDS and XRD analysis has evidently proved the presence of protective oxides formation on prolonged exposure at elevated temperature. The predominant oxide formed during the exposure at high temperature has a major contribution toward the protection of the samples. The nickel–iron-based superalloy is less prone to oxidation and hot corrosion when compared to the existing alloy in gas turbine engine simulating marine environment.

Hot Corrosion of Nimonic 105 in Sodium Sulfate-Sodium Chloride Melts

CORROSION ◽  
1981 ◽  
Vol 37 (7) ◽  
pp. 392-407 ◽  
Author(s):  
C. A. C. Sequeira ◽  
M. G. Hocking
Keyword(s):  
Sodium Chloride ◽  
Corrosion Behavior ◽  
Analytical Methods ◽  
Sodium Sulfate ◽  
Hot Corrosion ◽  
Corrosion Potential ◽  
Free Corrosion Potential ◽  
Chloride Melts ◽  
Ni Alloy ◽  
Potential Decay

Abstract The corrosion behavior of Nimonic 105 in molten Na2SO4, NaCl, and mixtures of these two salts, at 900 C, in laboratory air and under O2 + SO2/SO3 atmospheres has been evaluated by potentiodynamic, potential decay, and free corrosion potential measurements. In addition, the corrosion products were examined using several electron-optical techniques, and by other analytical methods. Pure Na2SO4 in air did not seem to be very corrosive towards Nimonic 105. Addition of NaCl to the molten Na2SO4 resulted in increased dissolution of Nimonic 105, which was in general nonuniform, alloy constituents nickel and cobalt dissolving more than others. Evidence of internal attack and enhancement of dissolution of the Ni alloy by SO3 was significant only when the corrosion conditions were prolonged. In pure NaCl, catastrophic corrosion occurs, which has been attributed to the depletion, dissolution, and vaporization of some alloy species.

Sign in / Sign up

Export Citation Format

Share Document