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51313-02517-Sulfidation and Naphthenic Acid Corrosion of UNS S31603 S31703 and S44400 in Crude Processing

Product Number: 51313-02517-SG
ISBN: 02517 2013 CP
Author: GLORIA DUARTE
Publication Date: 2013
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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 corrosion rates high of stainless steel at temperature approximately of 350 °C. This paper presents the results of laboratory and field tests conducted to assess the resistivity of different materials used in refinery construction especially 300 series steels and a new generation of 400 series stainless. 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 promising at processing crudes with high sulfur and naphthenic acid content. 

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 corrosion rates high of stainless steel at temperature approximately of 350 °C. This paper presents the results of laboratory and field tests conducted to assess the resistivity of different materials used in refinery construction especially 300 series steels and a new generation of 400 series stainless. 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 promising at processing crudes with high sulfur and naphthenic acid content. 

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