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.
Skip Nav Destination
Article navigation
1 July 1981
Research Article|
July 01 1981
Hot Corrosion of Nimonic 105 in Sodium Sulfate-Sodium Chloride Melts(1)
M. G. Hocking
M. G. Hocking
**Metallurgy and Materials Science Department Imperial College, London, S.W.7.
England
.
Search for other works by this author on:
*
Present address: Department de Quimica Inorg. e Anal., Instituto Superior Tecnio, Universidale de Lisboa, Portugal.
Online ISSN: 1938-159X
Print ISSN: 0010-9312
National Association of Corrosion Engineers
1981
CORROSION (1981) 37 (7): 392–407.
Citation
C. A. C. Sequeira, M. G. Hocking; Hot Corrosion of Nimonic 105 in Sodium Sulfate-Sodium Chloride Melts(1). CORROSION 1 July 1981; 37 (7): 392–407. https://doi.org/10.5006/1.3577291
Download citation file:
Citing articles via
Suggested Reading
Aspects of Vanadate Slag Corrosion on Ni 50Cr and Nimonic 90 (Ni 20Cr 16.4Co 2.2Ti 2A1 1Fe) Alloys
CONF_APR1989
Corrosion Aspects of the Vanadium Problem In Gas Turbines
CORROSION (January,1955)
Oxidation of 80Ni-20Cr Alloys In Carbon Monoxide At High Temperatures
CORROSION (August,1964)
Thermochemistry and Solubilities of Oxides in Sodium Sulfate-Vanadate Solutions
CORROSION (November,1989)