Abstract
| Original language | English |
|---|---|
| Title of host publication | Corrosion conference and expo 2012 |
| Pages | 5780-5800 |
| Volume | 7 |
| Publication status | Published - 2012 |
| MoE publication type | A4 Article in a conference publication |
| Event | Corrosion conference and expo 2012: NACE International corrosion 2012 conference and expo - Salt Lake City, United States Duration: 11 Mar 2012 → 15 Mar 2012 |
Publication series
| Series | NACE - International Corrosion Conference Series |
|---|---|
| ISSN | 0361-4409 |
Conference
| Conference | Corrosion conference and expo 2012 |
|---|---|
| Abbreviated title | CORROSION2012 |
| Country | United States |
| City | Salt Lake City |
| Period | 11/03/12 → 15/03/12 |
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Effect of alloy composition on stress corrosion cracking susceptibility of duplex stainless steels in hot alkaline sulfide solution. / Leinonen, Heikki; Pohjanne, Pekka; Chasse, K.R.; Singh, P.M.; Romu, J.; Saukkonen, T.; Hänninen, H.
Corrosion conference and expo 2012. Vol. 7 2012. p. 5780-5800 (NACE - International Corrosion Conference Series).Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review
TY - GEN
T1 - Effect of alloy composition on stress corrosion cracking susceptibility of duplex stainless steels in hot alkaline sulfide solution
AU - Leinonen, Heikki
AU - Pohjanne, Pekka
AU - Chasse, K.R.
AU - Singh, P.M.
AU - Romu, J.
AU - Saukkonen, T.
AU - Hänninen, H.
PY - 2012
Y1 - 2012
N2 - Stress corrosion cracking (SCC) susceptibility of the duplex stainless steels E 1.4162 (U S S32101) and E 1.4462 (U S S32205) was evaluated with U-bend specimens in the alkaline sulfide solution containing 100 g/l aOH and 55 g/l a 2S. Complementary potentiodynamic measurements were used to evaluate the effect of alloy composition on corrosion and on passivation behavior of the duplex stainless steels. The reference material in the study was the austenitic stainless steel E 1.4301 (U S S30400). Based on separate potentiodynamic curves and the free corrosion potential measurements of the alloys during the SCC tests, it is evident that Cr and i as the main alloying elements in duplex stainless steels raised the corrosion potential and lowered the critical current density of the steel, thus improving SCC resistance. Based on the potentiodynamic curves the alloying elements Mo and Mn were highly active in the hot caustic solution. SCC in the austenitic reference stainless steel was severe penetrating in the unaffected material but in the duplex stainless steels cracking was observed only inside the affected surface layer. Selective dissolution of Fe, Cr, Mn and Mo and/or enrichment of i and Cr as well as a, S and O took place in the affected surface layers of the duplex stainless steels depending on the steel grade
AB - Stress corrosion cracking (SCC) susceptibility of the duplex stainless steels E 1.4162 (U S S32101) and E 1.4462 (U S S32205) was evaluated with U-bend specimens in the alkaline sulfide solution containing 100 g/l aOH and 55 g/l a 2S. Complementary potentiodynamic measurements were used to evaluate the effect of alloy composition on corrosion and on passivation behavior of the duplex stainless steels. The reference material in the study was the austenitic stainless steel E 1.4301 (U S S30400). Based on separate potentiodynamic curves and the free corrosion potential measurements of the alloys during the SCC tests, it is evident that Cr and i as the main alloying elements in duplex stainless steels raised the corrosion potential and lowered the critical current density of the steel, thus improving SCC resistance. Based on the potentiodynamic curves the alloying elements Mo and Mn were highly active in the hot caustic solution. SCC in the austenitic reference stainless steel was severe penetrating in the unaffected material but in the duplex stainless steels cracking was observed only inside the affected surface layer. Selective dissolution of Fe, Cr, Mn and Mo and/or enrichment of i and Cr as well as a, S and O took place in the affected surface layers of the duplex stainless steels depending on the steel grade
M3 - Conference article in proceedings
SN - 978-1-6227-6078-7
VL - 7
T3 - NACE - International Corrosion Conference Series
SP - 5780
EP - 5800
BT - Corrosion conference and expo 2012
ER -