Potential-pH diagrams at elevatedtemperature for the system Fe-H2O

Townsend, H. E.

doi:10.1016/s0010-938x(70)80025-7

Cited by 93 publications

(20 citation statements)

References 12 publications

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“…We have found that both FesO4 and LiFeO2 crystals nucleate and grow on platinum in 1M LiOH at 285~ in the presence of a corroding carbon steel surface (33). Accordingly, the following set of reactions is proposed to account for the anodic and corrosion behavior of iron and carbon steel in 1M LiOH solution at elevated temperatures Fe + 3 OH---> HFeO2-+ H20 -{-2e- [6] 3Fe + 8 OH--> Fe30~ + 4H20 + Be- [7] 3HFeCh---> FesO4 + H20 + OH--5 2e- [8] Li + + HFeO2--~ LiFeO2 + H + + e- [9] Townsend (31) has recently shown that as the potential of iron is increased anodically it becomes thermodynamically possible for reactions [6], [7], and [8] to occur in the order listed above. Accordingly, the following set of reactions is proposed to account for the anodic and corrosion behavior of iron and carbon steel in 1M LiOH solution at elevated temperatures Fe + 3 OH---> HFeO2-+ H20 -{-2e- [6] 3Fe + 8 OH--> Fe30~ + 4H20 + Be- [7] 3HFeCh---> FesO4 + H20 + OH--5 2e- [8] Li + + HFeO2--~ LiFeO2 + H + + e- [9] Townsend (31) has recently shown that as the potential of iron is increased anodically it becomes thermodynamically possible for reactions [6], [7], and [8] to occur in the order listed above.…”

Section: Discussionmentioning

confidence: 99%

The Electrochemistry of Iron in lM Lithium Hydroxide Solution at 22° and 200°C

Macdonald

Owen²

1973

J. Electrochem. Soc.

104

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The electrochemical behavior of iron in 1M LiOH solution at 22 ~ and 200~ has been investigated using cyclic voltammetry, galvanostatic charging, and steady-state polarization techniques. At 22~ the data are consistent with the initial formation of Fe804 and Fe (OH)2 on the surface followed by the oxidation of iron to -y-Fe~O3 or Fe(OH)s. The anodic behavior of iron at 200~ can be explained by the following processes 1 ]Present address:

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Section: Discussionmentioning

confidence: 99%

The Electrochemistry of Iron in lM Lithium Hydroxide Solution at 22° and 200°C

Macdonald

Owen²

1973

J. Electrochem. Soc.

104

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“…2). The equilibrium potentials shown in the figure were calculated for pH 25 C 10.6 from the standard reduction potentials of the redox pairs reported in literature [25][26][27][28][29][30]. The E eq rdx À Á values are shown by vertical bars and the redox couple involved in each equilibrium reaction is given beside each bar.…”

Section: Resultsmentioning

confidence: 99%

Potentiostatic Oxide Growth Kinetics on Ni-Cr and Co-Cr Alloys: Potential and pH Dependences

Musa

Behazin

Wren

2015

Electrochimica Acta

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“…Also, visual observation of the sample surface reveals no (localized) attack, and E-pH diagrams for aqueous systems at 100°C suggest that the anodic current increase is probably due to the onset of oxygen evolution. 25 Figure 3(b) shows the cyclic polarization curve of type 316L stainless steel heat-treated at 650°C for 24 h. Apparently, no distinct differences are present between this curve and the one from the solutionannealed material (Figure 3[a]).…”

Section: Resultsmentioning

confidence: 99%