Salt melt induced corrosion of metallic materials in waste incineration plants

Spiegel, M.

doi:10.1002/(sici)1521-4176(199907)50:7<373::aid-maco373>3.0.co;2-t

Cited by 139 publications

(65 citation statements)

References 10 publications

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“…As a result, corrosion products, such as Fe/Cr chlorides, oxides, chromates, etc. are formed [2,5,6,7,8,9]. Most of the corrosion products form a complex eutectic mixture with the components present in the deposit [10].…”

Section: Effect Of Deposit Type and Sintering Temperaturementioning

confidence: 99%

Deposit Shedding in Biomass-Fired Boilers: Shear Adhesion Strength Measurements

Laxminarayan

Jensen

et al. 2017

Energy Fuels

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Ash deposition on boiler surfaces is a major problem encountered during biomass combustion. Ash deposition adversely influences the boiler efficiency, may corrode heat transfer surfaces, and may even completely block flue gas channels in severe cases, causing expensive unscheduled boiler shutdowns. Therefore, timely removal of ash deposits is essential for optimal boiler operation. In order to improve the understanding of deposit shedding in boilers, this study investigates the shear adhesion strength of biomass ash deposits on superheater tubes. Artificial biomass ash deposits were prepared on superheater tubes and sintered in an oven at temperatures up to 1000 °C. Subsequently, the deposits were sheared off by an electrically controlled arm, and the corresponding adhesion strength was measured. The results reveal the effect of temperature, deposit composition, sintering duration, and steel type on the adhesion strength.

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Section: Effect Of Deposit Type and Sintering Temperaturementioning

confidence: 99%

Deposit Shedding in Biomass-Fired Boilers: Shear Adhesion Strength Measurements

Laxminarayan

Jensen

et al. 2017

Energy Fuels

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“…It has been reported that the combustion of biomass [2,3], waste [4,5], and high-chlorine coals [6,7] cause severe materials wastage in superheaters.…”

Section: Introductionmentioning

confidence: 99%

Arc-Sprayed Fe-Based Coatings from Cored Wires for Wear and Corrosion Protection in Power Engineering

et al. 2018

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High wear and corrosion of parts lead to an increase in operating costs at thermal power plants. The present paper shows a possible solution to this problem through the arc spraying of protective coatings. Cored wires of the base alloying system Fe-Cr-C were used as a feedstock. Rise of wear-and heat-resistance of the coatings was achieved by additional alloying with Al, B, Ti, and Y. The wear and heat resistance of the coatings were tested via a two-body wear test accompanied by microhardness measurement and the gravimetric method, respectively. A high-temperature corrosion test was performed at 550 • C under KCl salt deposition. The porosity and adhesion strengths of the coatings were also evaluated. The microstructure was investigated with a scanning electron microscope (SEM) unit equipped with an energy dispersive X-ray (EDX) microanalyzer, and the phase composition was assessed by X-ray diffractometry. The test results showed the positive influence of additional alloying with Y on the coating properties. A comparison with commercial boiler materials showed that the coatings have the same level of heat resistance as austenite steels and are an order of magnitude higher than that of pearlite and martensite-ferrite steels. The coatings can be applied to wear-and heat-resistant applications at 20-700 • C.

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“…According to the phase diagram of Li-K-C-Fe [26], the porous K 2 Fe 2 O 4 can be a result of the direct penetration of the viscous mixed carbonate into the metal/scale interface and react with newly formed Fe 2 O 3 after the depletion of Li from the melt in this area, as is reported by Spiegel in the study of corrosion of metals underneath chlorides [27]. The scale on SS304 ( Figure 5(a)) was 40 m thick and contains three layers: the 20 m outermost layer and the innermost layer are separated by a darker region in the middle.…”

Section: Scale Morphology and Phase Analysismentioning

confidence: 73%

Electrochemical Impedance and Modelling Studies of the Corrosion of Three Commercial Stainless Steels in Molten Carbonate

2014

International Journal of Corrosion

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The corrosion induced by molten carbonates on the metallic structure materials is a problem constraining the life span of molten carbonate fuel cell (MCFC) at elevated temperatures. The reaction between the outgrowing oxide scale and lithium carbonate in the electrolyte is generally a slow process and very important to the passivation behaviour of the underlying steel. The corrosion behaviour of three commercial alloys (P92, SS304, and SS310) with different Cr contents in molten (0.62Li, 0.38K)2CO3at 650°C was monitored by electrochemical impedance spectroscopy (EIS) for 120 hours to investigate the lithiation process. With SEM images and extensive XRD analysis of the oxides, equivalent circuits were proposed to interpret the impedance data and explain the corrosion behaviour of the three alloys at different stage with respect to lithiation process.

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Salt melt induced corrosion of metallic materials in waste incineration plants

Cited by 139 publications

References 10 publications

Deposit Shedding in Biomass-Fired Boilers: Shear Adhesion Strength Measurements

Deposit Shedding in Biomass-Fired Boilers: Shear Adhesion Strength Measurements

Arc-Sprayed Fe-Based Coatings from Cored Wires for Wear and Corrosion Protection in Power Engineering

Electrochemical Impedance and Modelling Studies of the Corrosion of Three Commercial Stainless Steels in Molten Carbonate

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