Laboratory tests for hot-corrosion studies

Stein, Nicolas; Duret, C.; Morbioli, R.

doi:10.1179/026708386790123369

Cited by 1 publication

(3 citation statements)

References 24 publications

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“…Na, V, S, Pb, Cl Flow rate: 60 l h -1 Table 2. Composition of slag (all are in wt%) [9] Gas Turbines -Materials, Modeling and Performance…”

Section: Industrialmentioning

confidence: 99%

“…Failure investigations confirmed that it was due to hot corrosion, in which extensive penetration of sulphur took place into the material leading to the formation of metal sulphides that in turn led to reduction in mechanical properties of the materials resulting in catastrophic failures (Figs. 8,9,10). From literature it is also understood that it is not possible to develop an alloy having both high temperature strength and hot corrosion resistance simultaneously since alloying elements often have opposing effects on the two properties.…”

Section: Coatingsmentioning

confidence: 99%

“…aero, marine and industrial gas turbines [8]. Table II provides the composition of slag actually formed on first stage vanes in gas fired stationary gas turbine during operation [9]. Table III provides the relevance and importance of hot corrosion in various energy fields and the associated contaminants, which are responsible for degradation of components during the service [10].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Importance of Hot Corrosion and Its Effective Prevention for Enhanced Efficiency of Gas Turbines

Gurrappa¹,

Yashwanth²,

Mounika³

et al. 2015

Gas Turbines - Materials, Modeling and Performance

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Gas Turbines -Materials, Modeling and Performance 56 the hot corrosion resistance. This is further complicated for marine applications by the aggressivity of the environment, which includes sulphur and sodium from the fuel and various halides contained in seawater. These features are known to drastically reduce the superalloy component life and reliability by consuming the material at an unpredictably rapid rate, thereby reducing the load-carrying capacity and potentially leading to catastrophic failure of components [3][4][5]. Thus, the hot corrosion resistance of superalloys is as important as its high temperature strength in gas turbine engine applications. Recent studies have shown that the high temperature strength materials are most susceptible to hot corrosion and the surface engineering plays a key role in effectively combating the hot corrosion problem [6][7]. Therefore, the two materials (base and coating) must be considered as an integral system and the interface between them is also equally important as it can often be the limiting factor. This chapter explains the critical issue of hot corrosion of superalloy components in gas turbine engines and methodologies to select appropriate materials and coatings for its prevention. It is followed by an assessment of current status of coatings, coating techniques and finally, some of the critical areas that need to be addressed for development of more efficient and smart coatings.

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“…Na, V, S, Pb, Cl Flow rate: 60 l h -1 Table 2. Composition of slag (all are in wt%) [9] Gas Turbines -Materials, Modeling and Performance…”

Section: Industrialmentioning

confidence: 99%

Section: Coatingsmentioning

confidence: 99%