Corrosion behavior of superheater steels in the presence of potassium salts under conditions relevant to biomass combustion

Juho Lehmusto; Patrik Yrjas; Skrifvars Bengt-Johan; Mikko Hupa

Corrosion behavior of superheater steels in the presence of potassium salts under conditions relevant to biomass combustion

Juho Lehmusto, Patrik Yrjas, Skrifvars Bengt-Johan, Mikko Hupa

Research output: Chapter in Book/Conference proceeding › Conference contribution › Scientific

Abstract

The corrosion resistance of three steels; a ferritic 10CrMo type steel, an austenitic 304L type steel, and a nickel-based Alloy 625 type steel, to both solid KCl and K₂CO₃ was investigated in the laboratory. Samples were covered with either KCl or K₂CO₃ and held for 168h under two different atmospheres: dry air, and air with a water content of 30%. Analyses were performed with SEM/EDXA to determine the extent of corrosion, the elemental distribution, and for the identification of corrosion products. Both salts were found to be corrosive, and furthermore, water vapor was found to affect the reaction behavior of the salts. Alloy 625 exhibited the best corrosion resistance, whereas 10CrMo did not perform well even under the mildest conditions.

Original language	Undefined/Unknown
Title of host publication	8th International Symposium on High-Temperature Corrosion and Protection of Materials
Editors	N/A
Publisher	N/A
Pages	–
Publication status	Published - 2012
MoE publication type	B3 Non-refereed article in conference proceedings
Event	conference; 2012-05-20; 2012-05-25 - 8th International Symposium on High-Temperature Corrosion and Protection of Materials (HTPCM2012) Duration: 20 May 2012 → 25 May 2012

Conference

Conference	conference; 2012-05-20; 2012-05-25
Period	20/05/12 → 25/05/12

Keywords

Austenitic steel
Ferritic steel
Nickel-based alloy
Potassium carbonate
Potassium chloride

Cite this

@inproceedings{178e9fa253ff4ac4ae17ee66d65d2b7a,

title = "Corrosion behavior of superheater steels in the presence of potassium salts under conditions relevant to biomass combustion",

abstract = "The corrosion resistance of three steels; a ferritic 10CrMo type steel, an austenitic 304L type steel, and a nickel-based Alloy 625 type steel, to both solid KCl and K2CO3 was investigated in the laboratory. Samples were covered with either KCl or K2CO3 and held for 168h under two different atmospheres: dry air, and air with a water content of 30%. Analyses were performed with SEM/EDXA to determine the extent of corrosion, the elemental distribution, and for the identification of corrosion products. Both salts were found to be corrosive, and furthermore, water vapor was found to affect the reaction behavior of the salts. Alloy 625 exhibited the best corrosion resistance, whereas 10CrMo did not perform well even under the mildest conditions.",

keywords = "Austenitic steel, Ferritic steel, Nickel-based alloy, Potassium carbonate, Potassium chloride, Austenitic steel, Ferritic steel, Nickel-based alloy, Potassium carbonate, Potassium chloride, Austenitic steel, Ferritic steel, Nickel-based alloy, Potassium carbonate, Potassium chloride",

author = "Juho Lehmusto and Patrik Yrjas and Skrifvars Bengt-Johan and Mikko Hupa",

year = "2012",

language = "Odefinierat/ok{\"a}nt",

pages = "–",

editor = "N/A",

booktitle = "8th International Symposium on High-Temperature Corrosion and Protection of Materials",

publisher = "N/A",

note = "conference; 2012-05-20; 2012-05-25 ; Conference date: 20-05-2012 Through 25-05-2012",

}

Corrosion behavior of superheater steels in the presence of potassium salts under conditions relevant to biomass combustion. / Lehmusto, Juho ; Yrjas, Patrik; Bengt-Johan, Skrifvars et al.
8th International Symposium on High-Temperature Corrosion and Protection of Materials. ed. / N/A. N/A, 2012. p. –.

Research output: Chapter in Book/Conference proceeding › Conference contribution › Scientific

TY - GEN

T1 - Corrosion behavior of superheater steels in the presence of potassium salts under conditions relevant to biomass combustion

AU - Lehmusto, Juho

AU - Yrjas, Patrik

AU - Bengt-Johan, Skrifvars

AU - Hupa, Mikko

PY - 2012

Y1 - 2012

N2 - The corrosion resistance of three steels; a ferritic 10CrMo type steel, an austenitic 304L type steel, and a nickel-based Alloy 625 type steel, to both solid KCl and K2CO3 was investigated in the laboratory. Samples were covered with either KCl or K2CO3 and held for 168h under two different atmospheres: dry air, and air with a water content of 30%. Analyses were performed with SEM/EDXA to determine the extent of corrosion, the elemental distribution, and for the identification of corrosion products. Both salts were found to be corrosive, and furthermore, water vapor was found to affect the reaction behavior of the salts. Alloy 625 exhibited the best corrosion resistance, whereas 10CrMo did not perform well even under the mildest conditions.

AB - The corrosion resistance of three steels; a ferritic 10CrMo type steel, an austenitic 304L type steel, and a nickel-based Alloy 625 type steel, to both solid KCl and K2CO3 was investigated in the laboratory. Samples were covered with either KCl or K2CO3 and held for 168h under two different atmospheres: dry air, and air with a water content of 30%. Analyses were performed with SEM/EDXA to determine the extent of corrosion, the elemental distribution, and for the identification of corrosion products. Both salts were found to be corrosive, and furthermore, water vapor was found to affect the reaction behavior of the salts. Alloy 625 exhibited the best corrosion resistance, whereas 10CrMo did not perform well even under the mildest conditions.

KW - Austenitic steel

KW - Ferritic steel

KW - Nickel-based alloy

KW - Potassium carbonate

KW - Potassium chloride

KW - Austenitic steel

KW - Ferritic steel

KW - Nickel-based alloy

KW - Potassium carbonate

KW - Potassium chloride

KW - Austenitic steel

KW - Ferritic steel

KW - Nickel-based alloy

KW - Potassium carbonate

KW - Potassium chloride

M3 - Konferensbidrag

SP - –

BT - 8th International Symposium on High-Temperature Corrosion and Protection of Materials

A2 - N/A, null

PB - N/A

T2 - conference; 2012-05-20; 2012-05-25

Y2 - 20 May 2012 through 25 May 2012

ER -