Transport of sulfur in the scale growing on nickel in sulfur dioxide atmosphere at 873 K

Gilewicz-Wolter, J.; Ciechanowski, M.

doi:10.1007/bf00664343

Cited by 3 publications

(2 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Finally, in the at mosphere corresponding to point Z, the formation of the sulphide under the oxide scale is possible by the inward diffusion of both, SO 2 molecules and S atoms. The results of these experiments have been defeinitely confirmed by GilewiczWolter, using as a tracer radioactive sulphur isotope 35 S [29][30][31][32][33].…”

Section: Corrosion Mechanism In the Atmosphere Containing Oxygen And supporting

confidence: 60%

“…From the results of all these experiments [29][30][31][32][33][34]36] it follows clearly, that the sulphide can form under an oxide scale if the partial pressure of sulphur vapor in the sur rounding atmosphere is lower than the dissociation pres sure of this sulphide to be formed. This conclusion is of fundamental importance, since it implies that even trace amounts of sulphur vapor in the oxidizing atmosphere can create hot corrosion hazard for scalingresistant mate rials.…”

Section: Corrosion Mechanism In the Atmosphere Containing Oxygen And mentioning

confidence: 92%

See 1 more Smart Citation

High Temperature Corrosion of Metallic Materials in Composed Oxidizing Environments

Grzesik¹,

Mrowec²

2012

High Temperature Materials and Processes

View full text Add to dashboard Cite

Basing on actual theoretical approach and experimental results, the mechanism of sulphide formation beneath the oxide scale grown on metals in SO2-O2 atmospheres has been described. It has been shown that in spite of much lower sulphur partial pressure in the oxidizing atmosphere than the dissociation pressure of the sulphide to be formed, the sulphidation process takes place beneath the oxide scale. This, at the first sight, unexpected behavior results from the fact that sulphur is diffusing inwards through the primary oxide scale in the molecular form, i.e. SO2 molecules. Reaching thus metal-scale interface, where the oxygen partial pressure is very low, virtually equal to the dissociation pressure of the oxide forming the scale, SO2 ⇔ O2 + ½S2 equilibrium is shifted to the right, as a result of which the partial pressure of sulphur vapor dramatically increases, reaching the value several orders of magnitude higher than that needed for sulphide formation.Analogous situation is observed during oxidation of chromium steels in CO2-O2 atmospheres. In this case, namely, carburisation process is observed beneath the oxide scale, in spite of the fact that carbon activity in this environment is several order of magnitude lower than that required for chromium carbide formation. This again unexpected situation becomes understandable if one assumes – like in the case of metal oxidation in SO2 containing atmosphere – that carbon is transported through the oxide scale in the form of CO2 molecules.The final conclusion is, that the explanation of the mechanism of sulphide formation beneath the oxide scale on metals and of carburization beneath the oxide scales on steels constitutes the important step forward, leading to the better understanding of high temperature corrosion mechanisms of metallic materials, observed in multicomponent agresive gases.

show abstract

Section: Corrosion Mechanism In the Atmosphere Containing Oxygen And supporting

confidence: 60%

Section: Corrosion Mechanism In the Atmosphere Containing Oxygen And mentioning

confidence: 92%

High Temperature Corrosion of Metallic Materials in Composed Oxidizing Environments

Grzesik¹,

Mrowec²

2012

High Temperature Materials and Processes

View full text Add to dashboard Cite

show abstract

Sulphidation-oxidation behavior of a Ni-Co-Cr-Si alloy in an SO2 + O2 atmosphere

Hocking

Sidky

1993

Oxid Met

View full text Add to dashboard Cite

Reactions of metals in mixed environments

Birks¹,

Meier

Pettit

2006

Introduction to the High Temperature Oxidation of Metals

View full text Add to dashboard Cite

Transport of sulfur in the scale growing on nickel in sulfur dioxide atmosphere at 873 K

Cited by 3 publications

References 8 publications

High Temperature Corrosion of Metallic Materials in Composed Oxidizing Environments

High Temperature Corrosion of Metallic Materials in Composed Oxidizing Environments

Sulphidation-oxidation behavior of a Ni-Co-Cr-Si alloy in an SO2 + O2 atmosphere

Reactions of metals in mixed environments

Contact Info

Product

Resources

About