High temperature corrosion of coatings and boiler steels in oxidizing chlorine-containing atmosphere

Uusitalo, Mikko A.; Vuoristo, P.; Mäntylä, T.

doi:10.1016/s0921-5093(02)00537-3

Cited by 95 publications

(49 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…8(c) which corresponded to the coating that was unable to form a continuous and protective scale. These findings were in a good accordance with studies concerning active oxidation mechanism (Ref 5,22). XRD spectra peaks attributable to KCr 2 O 4 were also observed in case of exposed Ni21Cr9Mo coatings, corroborating the earlier observation from the elemental map that K (without Cl) remained in addition to Cr at the Ni21Cr9Mo surface.…”

Section: Phase Constituent Of the Exposed Coatingssupporting

confidence: 92%

“…The rapid development of thermal spray processes offers attractive and cost-effective routes to avoid degradation of low alloy tubes by selecting appropriate coating chemistry and manufacturing process (Ref 16,17). A variety of thermal spray methods including atmospheric plasma spray (APS), arc spray and high-velocity air-fuel (HVOF) have been already used to fabricate corrosion resistant coatings (Ref [18][19][20][21][22]. High-velocity air-fuel (HVAF), a promising method to produce dense and adherent coating, works based on high-velocity impact of molten or semi-molten particles which could be used to apply a wide range of coating materials including Ni-based powders (Ref [23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

KCl-Induced High-Temperature Corrosion Behavior of HVAF-Sprayed Ni-Based Coatings in Ambient Air

et al. 2018

View full text Add to dashboard Cite

KCl-induced high-temperature corrosion behavior of four HVAF-sprayed Ni-based coatings (Ni21Cr, Ni5Al, Ni21Cr7Al1Y and Ni21Cr9Mo) under KCl deposit has been investigated in ambient air at 600°C up to 168 h. The coatings were deposited onto 16Mo3 steel-a widely used boiler tube material. Uncoated substrate, 304L and Sanicro 25 were used as reference materials in the test environment. SEM/EDS and XRD techniques were utilized to characterize the as-sprayed and exposed samples. The results showed that the small addition of KCl significantly accelerated degradation to the coatings. All coatings provided better corrosion resistance compared to the reference materials. The alumina-forming Ni5Al coating under KCl deposit was capable of forming a more protective oxide scale compared to the chromia-forming coatings as penetration of Cl through diffusion paths was hindered. Both active corrosion and chromate formation mechanisms were found to be responsible for the corrosion damages. The corrosion resistance of the coatings based on the microstructure analysis and kinetics had the following ranking (from the best to worst):

show abstract

Section: Phase Constituent Of the Exposed Coatingssupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

KCl-Induced High-Temperature Corrosion Behavior of HVAF-Sprayed Ni-Based Coatings in Ambient Air

et al. 2018

View full text Add to dashboard Cite

show abstract

“…1. Chloride-induced corrosion rate of iron and selected steel grades in Ar/He-O2-HCl atmosphere was examined in [6,7,8,9,10]. The oxidation of iron exposed to alkali and heavy metal chlorides and sulfates mixtures was discussed in [11].…”

Section: Introductionmentioning

confidence: 99%

Chloride corrosion in biomass-fired boilers – Fe-O-Cl system thermodynamic analysis

Kaczmarczyk

Mlonka-Mędrala

2016

E3S Web Conf.

View full text Add to dashboard Cite

Abstract. The most common and easiest alternative technologies for conventional fossil fuel combustion are biomass combustion and co-combustion. However, high-chlorine fuels (Cl ar >0,2%) like: biomass, waste and high chlorine coals generate the risk of intensified corrosion process and a limited steel mechanical strength is observed.The paper presents a thermodynamic analysis of chloride-induced corrosion in the Fe-O-Cl system. The ranges of the metallic, oxide and chloride phase stability are determined within the temperature range T = 750-1000 K. Based on the parametric equations the equilibrium concentration of gaseous phase determined by Deacon reaction are presented. The effect of H 2 O concentration in the gaseous phase on high-temperature corrosion process and gaseous NaCl influence on NaFeO 2 formation in the passive oxide scale layer (FeO/Fe 3 O 4 /Fe 2 O 3 ) are discussed as well. The results are correlated with available in the literature laboratory experimental data and industrial corrosion process observations. Presented thermodynamic analysis is compared with assumptions of "active oxidation" model. The results may be used for experimental research prediction and a corrosion prevention in the industry.

show abstract

“…OWER plants are one of the major industries suffering from severe oxidation, corrosion and erosion problems resulting in the substantial losses [1]. Oxidation and Corrosion from the firing of coal or oil is essentially related to specific impurities in the fuels which can lead to the formation of non protective scales or can disrupt normally protective oxide scales.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Thermocyclic Oxidation Behavior of HVOF Sprayed WC-CrC-Ni Coatings

Somasundaram¹,

Kadoli²,

Рамеш³

et al. 2015

BIJIEMS

View full text Add to dashboard Cite

show abstract

High temperature corrosion of coatings and boiler steels in oxidizing chlorine-containing atmosphere

Cited by 95 publications

References 20 publications

KCl-Induced High-Temperature Corrosion Behavior of HVAF-Sprayed Ni-Based Coatings in Ambient Air

KCl-Induced High-Temperature Corrosion Behavior of HVAF-Sprayed Ni-Based Coatings in Ambient Air

Chloride corrosion in biomass-fired boilers – Fe-O-Cl system thermodynamic analysis

Evaluation of Thermocyclic Oxidation Behavior of HVOF Sprayed WC-CrC-Ni Coatings

Contact Info

Product

Resources

About