Experimental and Comparative Study of the Corrosion Behavior of Lean Duplex Stainless Steel in Seawater
Hassanzadeh, M.; Larche, N.; Allion-Maurer, A.; Dewil, R.; Rossi, B. (2026). Experimental and Comparative Study of the Corrosion Behavior of Lean Duplex Stainless Steel in Seawater. Materials and Corrosion-Werkstoffe und Korrosion 77(9): 1399-1423. https://dx.doi.org/10.1002/maco.70159
In: Materials and Corrosion-Werkstoffe und Korrosion. Wiley: Weinheim. ISSN 0947-5117; e-ISSN 1521-4176, more
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| Author keywords |
austenitic stainless steel;crevice corrosion;duplex stainless steel;pitting corrosion;seawater;sigma-phase precipitation;resistance;mechanism |
| Authors | | Top |
- Hassanzadeh, M.
- Larche, N.
- Allion-Maurer, A.
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- Dewil, R., more
- Rossi, B.
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| Abstract |
This study investigates the localized corrosion resistance of lean duplex stainless steel S32202 (EN 1.4062) in natural seawater. Its performance is compared to that of austenitic stainless steel 316 L (EN 1.4404), standard duplex S32205 (EN 1.4462), and super duplex S32750 (EN 1.4410) stainless steels. Crevice and pitting corrosion tests are conducted following the ISO 18070:2015 and ASTM G150 standards, respectively. The results indicate that EN 1.4062 exhibits superior critical pitting temperature and higher crevice corrosion resistance compared with EN 1.4404. Under a severe combination of conditions: a 20 degrees C water temperature, a gasket pressure of 20 N/mm2, and a surface roughness of Ra = 0.3 +/- 0.1 mu m, even the higher-grade EN 1.4462 and EN 1.4410 may be susceptible to crevice corrosion. These findings suggest that EN 1.4062 may be suitable for certain short-term seawater applications, either independently or in combination with corrosion protection strategies. |
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