The effect of ash deposition on corrosion behaviour of boiler steels in simulated combustion atmospheres containing carbon dioxide (CORBI PROJECT)

S. Sroda (Corresponding Author), Martti Mäkipää, S. Cha, M. Spiegel

Research output: Contribution to journalArticleScientificpeer-review

15 Citations (Scopus)

Abstract

This study is a part of the FP5 Project entitled “Mitigation of Formation of Chlorine Rich Deposits Affecting Superheater Corrosion under Co‐Combustion Conditions” (CORBI) which is aimed to improve the understanding of corrosion mechanisms in cases of biomass and waste combustion.

The laboratory experiments, made at the JRC Plant Simulation Test Laboratory, are focused mainly on common ferritic and austenitic materials (X10, X20, 2.25Cr1Mo, AC66, Sanicro28, Esshette 1250, etc.), which are usually used in energy conversion systems. The experiments were carried out in multi‐sample autoclaves at an isothermal temperature of 535 °C in various simulated combustion atmospheres (22% H2O + 5% O2 + xCO2 + N 2 with different CO2 content varying from 0 to 25 vol.%) on samples with and without filter/cyclone ash deposition. The results obtained show that the corrosion rate of the studied materials increases with increasing CO2 content in the atmosphere. Such behaviour was observed for samples with and without ash deposit.

The detailed analysis and thermodynamic calculations of cyclone and filter ash behaviour were performed at MPIE in Duesseldorf. The ashes were exposed to 13% CO2 + 5% O2 + xH2O + y HCl + N2 atmospheres with different H2O content varying from 5–22% and HCl content varying from 0–200 ppm at 535 °C. The results obtained show that in an HCl‐containing atmosphere the alkali chloride formed from alkali carbonate, as well as hydroxides and oxides, can additionally accelerate the oxidation process. In the HCl free atmosphere at increased H2O content, alkali carbonates and hydroxides can form, so enhanced alkali chloride induced oxidation will not occur.
Original languageEnglish
Pages (from-to)176-181
Number of pages6
JournalMaterials and Corrosion
Volume57
Issue number2
DOIs
Publication statusPublished - 2006
MoE publication typeA1 Journal article-refereed

Fingerprint

Ashes
Steel
Alkalies
Carbon Dioxide
Boilers
corrosion
Carbon dioxide
ash
combustion
carbon dioxide
steel
Hydroxides
Corrosion
atmosphere
Carbonates
Chlorides
Deposits
cyclone
hydroxide
Superheaters

Keywords

  • CO2
  • hot corrosion
  • ash deposition
  • exposure tests
  • simulated combustion atmosphere
  • boiler steels

Cite this

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title = "The effect of ash deposition on corrosion behaviour of boiler steels in simulated combustion atmospheres containing carbon dioxide (CORBI PROJECT)",
abstract = "This study is a part of the FP5 Project entitled “Mitigation of Formation of Chlorine Rich Deposits Affecting Superheater Corrosion under Co‐Combustion Conditions” (CORBI) which is aimed to improve the understanding of corrosion mechanisms in cases of biomass and waste combustion.The laboratory experiments, made at the JRC Plant Simulation Test Laboratory, are focused mainly on common ferritic and austenitic materials (X10, X20, 2.25Cr1Mo, AC66, Sanicro28, Esshette 1250, etc.), which are usually used in energy conversion systems. The experiments were carried out in multi‐sample autoclaves at an isothermal temperature of 535 °C in various simulated combustion atmospheres (22{\%} H2O + 5{\%} O2 + xCO2 + N 2 with different CO2 content varying from 0 to 25 vol.{\%}) on samples with and without filter/cyclone ash deposition. The results obtained show that the corrosion rate of the studied materials increases with increasing CO2 content in the atmosphere. Such behaviour was observed for samples with and without ash deposit.The detailed analysis and thermodynamic calculations of cyclone and filter ash behaviour were performed at MPIE in Duesseldorf. The ashes were exposed to 13{\%} CO2 + 5{\%} O2 + xH2O + y HCl + N2 atmospheres with different H2O content varying from 5–22{\%} and HCl content varying from 0–200 ppm at 535 °C. The results obtained show that in an HCl‐containing atmosphere the alkali chloride formed from alkali carbonate, as well as hydroxides and oxides, can additionally accelerate the oxidation process. In the HCl free atmosphere at increased H2O content, alkali carbonates and hydroxides can form, so enhanced alkali chloride induced oxidation will not occur.",
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author = "S. Sroda and Martti M{\"a}kip{\"a}{\"a} and S. Cha and M. Spiegel",
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pages = "176--181",
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The effect of ash deposition on corrosion behaviour of boiler steels in simulated combustion atmospheres containing carbon dioxide (CORBI PROJECT). / Sroda, S. (Corresponding Author); Mäkipää, Martti; Cha, S.; Spiegel, M.

In: Materials and Corrosion, Vol. 57, No. 2, 2006, p. 176-181.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - The effect of ash deposition on corrosion behaviour of boiler steels in simulated combustion atmospheres containing carbon dioxide (CORBI PROJECT)

AU - Sroda, S.

AU - Mäkipää, Martti

AU - Cha, S.

AU - Spiegel, M.

PY - 2006

Y1 - 2006

N2 - This study is a part of the FP5 Project entitled “Mitigation of Formation of Chlorine Rich Deposits Affecting Superheater Corrosion under Co‐Combustion Conditions” (CORBI) which is aimed to improve the understanding of corrosion mechanisms in cases of biomass and waste combustion.The laboratory experiments, made at the JRC Plant Simulation Test Laboratory, are focused mainly on common ferritic and austenitic materials (X10, X20, 2.25Cr1Mo, AC66, Sanicro28, Esshette 1250, etc.), which are usually used in energy conversion systems. The experiments were carried out in multi‐sample autoclaves at an isothermal temperature of 535 °C in various simulated combustion atmospheres (22% H2O + 5% O2 + xCO2 + N 2 with different CO2 content varying from 0 to 25 vol.%) on samples with and without filter/cyclone ash deposition. The results obtained show that the corrosion rate of the studied materials increases with increasing CO2 content in the atmosphere. Such behaviour was observed for samples with and without ash deposit.The detailed analysis and thermodynamic calculations of cyclone and filter ash behaviour were performed at MPIE in Duesseldorf. The ashes were exposed to 13% CO2 + 5% O2 + xH2O + y HCl + N2 atmospheres with different H2O content varying from 5–22% and HCl content varying from 0–200 ppm at 535 °C. The results obtained show that in an HCl‐containing atmosphere the alkali chloride formed from alkali carbonate, as well as hydroxides and oxides, can additionally accelerate the oxidation process. In the HCl free atmosphere at increased H2O content, alkali carbonates and hydroxides can form, so enhanced alkali chloride induced oxidation will not occur.

AB - This study is a part of the FP5 Project entitled “Mitigation of Formation of Chlorine Rich Deposits Affecting Superheater Corrosion under Co‐Combustion Conditions” (CORBI) which is aimed to improve the understanding of corrosion mechanisms in cases of biomass and waste combustion.The laboratory experiments, made at the JRC Plant Simulation Test Laboratory, are focused mainly on common ferritic and austenitic materials (X10, X20, 2.25Cr1Mo, AC66, Sanicro28, Esshette 1250, etc.), which are usually used in energy conversion systems. The experiments were carried out in multi‐sample autoclaves at an isothermal temperature of 535 °C in various simulated combustion atmospheres (22% H2O + 5% O2 + xCO2 + N 2 with different CO2 content varying from 0 to 25 vol.%) on samples with and without filter/cyclone ash deposition. The results obtained show that the corrosion rate of the studied materials increases with increasing CO2 content in the atmosphere. Such behaviour was observed for samples with and without ash deposit.The detailed analysis and thermodynamic calculations of cyclone and filter ash behaviour were performed at MPIE in Duesseldorf. The ashes were exposed to 13% CO2 + 5% O2 + xH2O + y HCl + N2 atmospheres with different H2O content varying from 5–22% and HCl content varying from 0–200 ppm at 535 °C. The results obtained show that in an HCl‐containing atmosphere the alkali chloride formed from alkali carbonate, as well as hydroxides and oxides, can additionally accelerate the oxidation process. In the HCl free atmosphere at increased H2O content, alkali carbonates and hydroxides can form, so enhanced alkali chloride induced oxidation will not occur.

KW - CO2

KW - hot corrosion

KW - ash deposition

KW - exposure tests

KW - simulated combustion atmosphere

KW - boiler steels

U2 - 10.1002/maco.200503906

DO - 10.1002/maco.200503906

M3 - Article

VL - 57

SP - 176

EP - 181

JO - Materials and Corrosion

JF - Materials and Corrosion

SN - 0947-5117

IS - 2

ER -