A model to predict erosion on mild steel surfaces impacted by boiler fly ash particles

Mbabazi, John G.; Sheer, T. J.; Shandu, Richard Dumisani

doi:10.1016/j.wear.2004.03.007

Cited by 61 publications

(32 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For sphere particles, shape factor is equal to 3. The erosion rate due to cutting wear ε c , defined as the ratio of the mass of the material eroded (m), from the target surface to mass of the impacting particle (m p ), is given by the following equation [1][2][3]:…”

Section: Mechanism Of Cutting Wearmentioning

confidence: 99%

“…ρ m and ρ p are the densities of the target material, and the particle K c and K 1 are constants [1][2][3].…”

Section: Mechanism Of Cutting Wearmentioning

confidence: 99%

“…The kinetic energy of the impacting particles is sufficient to generate considerably greater force being imparted to the metal than is required to create platelets on the surface and as a consequence, a work hardened zone formed, and steady state erosion begins. Particle kinetic energy, responsible for extrusion-forging process during plastic deformation, is given as [1][2][3] …”

Section: Mechanism Of Plastic Deformation Wearmentioning

confidence: 99%

“…However, the overall erosion rate, combining the cutting and plastic deformation wear mechanisms, may be then given by the following equation [1][2][3]:…”

Section: Overall Erosion Ratementioning

confidence: 99%

“…The resulting penalty is not only the cost of replacing the components but also the cost of stoppage of power production. It is desirable, therefore, to be able to predict the rate of erosion of the boiler components in order to systematically plan the maintenance and/or replacement schedules of these components to avoid forced outages [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Erosion-Oxidation Response of Boiler Grade Steels: A Mathematical Investigation

Das

Hegde

Dey

et al. 2008

Research Letters in Materials Science

View full text Add to dashboard Cite

A ductile erosion model embodying the mechanisms of erosion involving cutting wear and repeated plastic deformation has been developed to predict erosion rates of boiler grade steels. The issue of erosion-oxidation interaction has also been addressed to further predict the mass loss resulted from this composite mechanism. A deterministic formalism for the kinetics of oxide-scale growth and a probabilistic approach to characterize the material loss are employed to describe simultaneous actions of hightemperature oxidation and mechanical erosion. The model predictions are in good agreement with the published data.

show abstract

Section: Mechanism Of Cutting Wearmentioning

confidence: 99%

“…ρ m and ρ p are the densities of the target material, and the particle K c and K 1 are constants [1][2][3].…”

Section: Mechanism Of Cutting Wearmentioning

confidence: 99%

Section: Mechanism Of Plastic Deformation Wearmentioning

confidence: 99%

“…However, the overall erosion rate, combining the cutting and plastic deformation wear mechanisms, may be then given by the following equation [1][2][3]:…”

Section: Overall Erosion Ratementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Erosion-Oxidation Response of Boiler Grade Steels: A Mathematical Investigation

Das

Hegde

Dey

et al. 2008

Research Letters in Materials Science

View full text Add to dashboard Cite

show abstract

Industrial Steam Boilers

Barroso¹,

Barreras²,

Ballester³

et al. 2010

Handbook of Combustion

View full text Add to dashboard Cite

This chapter summarizes the essentials and trends of steam generation in industrial boilers burning fossil and biofuels. A descriptive overview of the present technology, main combustion systems and heat transfer schemes is first provided, after which the principles of conventional design methods and trends and achievements of computational fluid dynamics‐based techniques for boiler design are discussed. Combustion diagnostics and control systems, and their influence on both boiler efficiency and fouling and slagging on heat‐transfer surfaces, are also analyzed. Finally, the technology outlook for steam boilers is discussed, notably in respect of improving their efficiency and reducing the environmental impact of gas and solid emissions. New boiler concepts are addressed, including topics such as supercritical boilers, low‐NO x burners, and oxycombustion systems.

show abstract

Internal cathodic protection to study the erosion‐corrosion of AISI 1018 carbon steel

et al. 2021

View full text Add to dashboard Cite

Steel elbows used in pipelines carrying potash slurry may undergo material loss due to mechanical erosion and/or electrochemical corrosion. Cathodic protection was used to study the effects of flow velocity and slurry concentration on the protection current density required to maintain AISI 1018 carbon steel elbows at a set electric potential. A flow loop with a peristaltic pump was used to pump a slurry consisting of silica sand in a saturated potash brine through the steel elbows. The protection current density measurements were performed under varying slurry flow velocities of 2.5, 3.0, 3.5, and 4.0 m/s and varying slurry concentrations ranging from 0-35 wt%. The results show maximum values of protection current density were required for mid-range slurry concentrations. It is concluded that, within the parameters of study, high flow velocities require higher protection current density than low flow velocities. Furthermore, high flow velocities result in a local maximum protection current density being reached at lower slurry concentrations; conversely, a local maximum protection current density is reached at higher slurry concentrations in lower flow velocities. The contrast in local maximum protection current densities likely occurs due to additional particle-particle collisions at higher velocities causing the maximum mass transfer rate of oxygen to be reached at lower slurry concentrations. SEM micrographs show that wear becomes more evenly distributed with increasing flow velocity due to the homogeneous distribution of particles in the flowing medium.

show abstract

A model to predict erosion on mild steel surfaces impacted by boiler fly ash particles

Cited by 61 publications

References 17 publications

Erosion-Oxidation Response of Boiler Grade Steels: A Mathematical Investigation

Erosion-Oxidation Response of Boiler Grade Steels: A Mathematical Investigation

Industrial Steam Boilers

Internal cathodic protection to study the erosion‐corrosion of AISI 1018 carbon steel

Contact Info

Product

Resources

About