Stainless steel pitting in chloride-sulfate solutions: The role of cations

Pekka Pohjanne, Leena Carpén, Petri Kinnunen, J. Rämö, A. Sarpola, M. Riihimäki, T. Hakkarainen

Research output: Contribution to conferenceConference articleScientificpeer-review

Abstract

Chlorides and sulfates are the most important ions while considering the possibility of pitting corrosion of stainless steel. It is generally accepted that the risk of pitting increases with increasing chloride concentration and decreases with increasing sulfate concentration. There are also indications that higher sulfate/chloride ionic ratio is needed to inhibit the pitting corrosion of stainless steels at higher chloride concentrations. However, the role of cations in the pitting event has gained only a little attention. In this study the pitting behavior of stainless steel type AISI 304 (EN 1.4301) has been studied in various binary mixtures of MgSO4, K2SO4 or Li2SO4 with NaCl. Results are compared to those obtained in binary mixtures of Na2SO4 with NaCl as well as in plain NaCl.
Original languageEnglish
Pages071981-0719813
Publication statusPublished - 2007

Fingerprint

Pitting
Stainless steel
Positive ions
Binary mixtures
Corrosion
Sulfates
Ions

Keywords

  • stainless steel
  • pitting
  • pitting corrosion
  • chlorides
  • sulfates

Cite this

Pohjanne, P., Carpén, L., Kinnunen, P., Rämö, J., Sarpola, A., Riihimäki, M., & Hakkarainen, T. (2007). Stainless steel pitting in chloride-sulfate solutions: The role of cations. 071981-0719813.
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abstract = "Chlorides and sulfates are the most important ions while considering the possibility of pitting corrosion of stainless steel. It is generally accepted that the risk of pitting increases with increasing chloride concentration and decreases with increasing sulfate concentration. There are also indications that higher sulfate/chloride ionic ratio is needed to inhibit the pitting corrosion of stainless steels at higher chloride concentrations. However, the role of cations in the pitting event has gained only a little attention. In this study the pitting behavior of stainless steel type AISI 304 (EN 1.4301) has been studied in various binary mixtures of MgSO4, K2SO4 or Li2SO4 with NaCl. Results are compared to those obtained in binary mixtures of Na2SO4 with NaCl as well as in plain NaCl.",
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Pohjanne, P, Carpén, L, Kinnunen, P, Rämö, J, Sarpola, A, Riihimäki, M & Hakkarainen, T 2007, 'Stainless steel pitting in chloride-sulfate solutions: The role of cations' pp. 071981-0719813.

Stainless steel pitting in chloride-sulfate solutions : The role of cations. / Pohjanne, Pekka; Carpén, Leena; Kinnunen, Petri; Rämö, J.; Sarpola, A.; Riihimäki, M.; Hakkarainen, T.

2007. 071981-0719813.

Research output: Contribution to conferenceConference articleScientificpeer-review

TY - CONF

T1 - Stainless steel pitting in chloride-sulfate solutions

T2 - The role of cations

AU - Pohjanne, Pekka

AU - Carpén, Leena

AU - Kinnunen, Petri

AU - Rämö, J.

AU - Sarpola, A.

AU - Riihimäki, M.

AU - Hakkarainen, T.

N1 - CA2: TK202

PY - 2007

Y1 - 2007

N2 - Chlorides and sulfates are the most important ions while considering the possibility of pitting corrosion of stainless steel. It is generally accepted that the risk of pitting increases with increasing chloride concentration and decreases with increasing sulfate concentration. There are also indications that higher sulfate/chloride ionic ratio is needed to inhibit the pitting corrosion of stainless steels at higher chloride concentrations. However, the role of cations in the pitting event has gained only a little attention. In this study the pitting behavior of stainless steel type AISI 304 (EN 1.4301) has been studied in various binary mixtures of MgSO4, K2SO4 or Li2SO4 with NaCl. Results are compared to those obtained in binary mixtures of Na2SO4 with NaCl as well as in plain NaCl.

AB - Chlorides and sulfates are the most important ions while considering the possibility of pitting corrosion of stainless steel. It is generally accepted that the risk of pitting increases with increasing chloride concentration and decreases with increasing sulfate concentration. There are also indications that higher sulfate/chloride ionic ratio is needed to inhibit the pitting corrosion of stainless steels at higher chloride concentrations. However, the role of cations in the pitting event has gained only a little attention. In this study the pitting behavior of stainless steel type AISI 304 (EN 1.4301) has been studied in various binary mixtures of MgSO4, K2SO4 or Li2SO4 with NaCl. Results are compared to those obtained in binary mixtures of Na2SO4 with NaCl as well as in plain NaCl.

KW - stainless steel

KW - pitting

KW - pitting corrosion

KW - chlorides

KW - sulfates

M3 - Conference article

SP - 71981

EP - 719813

ER -