Materials selection has become one of the most important factors in the design and repair of refinery processing equipment. Processing crude oil with high naphthenic acid (TAN) and high sulfur content can lead to high corrosion rates in stainless steels at temperature approximately of 350 °C. This paper presents the results of laboratory and field tests conducted to assess the corrosion resistance of different materials used in refinery construction, especially stainless steels type 316L (UNS S31603), type 317L (UNS S31703) and a new generation of 400 series stainless type 444 (UNS S44400). The laboratory tests were carried in a dynamic autoclave using a rotation speed of 600 rpm. Field test consisted of exposing corrosion coupons in the transfer line between furnace and atmospheric tower. Results have shown that stainless type 444 is an alternative material at processing crudes with high sulfur and naphthenic acid content.
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Sulfidation and Naphthenic Acid Corrosion of UNS S31603, UNS S31703 and UNS S44400 Series Stainless Steels in Crude Processing
Gloria Isabel Duarte Poveda;
Gloria Isabel Duarte Poveda
ICP-ECOPETROL S.A.
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Edwin Alberto Morantes;
Edwin Alberto Morantes
ICP-ECOPETROL S.A.
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Nubia Esperanza Mejía Cajicá;
Nubia Esperanza Mejía Cajicá
Ambiocoop Ltda.
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Darío Yesid Peña Ballesteros
Darío Yesid Peña Ballesteros
Universidad Industrial de Santander
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Paper presented at the CORROSION 2013, Orlando, Florida, March 2013.
Paper Number:
NACE-2013-2517
Published:
March 17 2013
Citation
Poveda, Gloria Isabel Duarte, Morantes, Edwin Alberto, Cajicá, Nubia Esperanza Mejía, and Darío Yesid Peña Ballesteros. "Sulfidation and Naphthenic Acid Corrosion of UNS S31603, UNS S31703 and UNS S44400 Series Stainless Steels in Crude Processing." Paper presented at the CORROSION 2013, Orlando, Florida, March 2013.
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