Menu
Search
Filters
Close
Menu

98576 NAPHTHENIC ACID CORROSION IN SYNTHETIC FWELS PRODUCTION

Picture for 98576 NAPHTHENIC ACID CORROSION IN SYNTHETIC
Available for download
Product Number: 51300-98576-SG
ISBN: 98576 1998 CP
Author: Hendrik J. de Bruyn
Industry: Materials Selection and Design
$0.00
$20.00
$20.00
Serious corrosion damage to carbon steel piping in a fractionation unit associated with synthetic fuels production has been ascribed to the presence of naphthenic acids. Investigation of the problem revealed total acids numbers (TAN) ranging from 8 - 12mg KOH/g in the feed to the unit. Damage typically occurred in the temperature range 180 - 240°C and manifested as localized pitting, preferential weld corrosion, general wall thinning and end-grain attack. Filming amine corrosion inhibitors designed for refinery overhead systems have been proven ineffective and high temperature phosphate-based inhibitors could not be used due to potential catalyst poisoning in downstream refinery units. Coupon exposures indicated corrosion rates in the order of 2 mm/y on carbon steel in a reboiler line as well as pitting to austenitic stainless steel type UNS S30403. Line replacement in austenitic stainless steel UNS S31603 has been proven effective. The performance of this alloy is mainly ascribed to its molybdenum content. The absence of sulfur in the feed to the unit is also contributing to the alloy performance despite the extremely high total acid numbers. Keywords: naphthenic acid, refining, oil fractionation, materials selection, austenitic stainless steel
Serious corrosion damage to carbon steel piping in a fractionation unit associated with synthetic fuels production has been ascribed to the presence of naphthenic acids. Investigation of the problem revealed total acids numbers (TAN) ranging from 8 - 12mg KOH/g in the feed to the unit. Damage typically occurred in the temperature range 180 - 240°C and manifested as localized pitting, preferential weld corrosion, general wall thinning and end-grain attack. Filming amine corrosion inhibitors designed for refinery overhead systems have been proven ineffective and high temperature phosphate-based inhibitors could not be used due to potential catalyst poisoning in downstream refinery units. Coupon exposures indicated corrosion rates in the order of 2 mm/y on carbon steel in a reboiler line as well as pitting to austenitic stainless steel type UNS S30403. Line replacement in austenitic stainless steel UNS S31603 has been proven effective. The performance of this alloy is mainly ascribed to its molybdenum content. The absence of sulfur in the feed to the unit is also contributing to the alloy performance despite the extremely high total acid numbers. Keywords: naphthenic acid, refining, oil fractionation, materials selection, austenitic stainless steel
PRICE BREAKS - The more you buy, the more you save
Quantity
1+
5+
Price
$20.00
$20.00
Product tags
Also Purchased
Picture for 98579 FACTORS CONTROLLING NAPHTHENIC ACID
Available for download

98579 FACTORS CONTROLLING NAPHTHENIC ACID CORROSION

Product Number: 51300-98579-SG
ISBN: 98579 1998 CP
Author: E Slavcheva, B Shone, A Turnbull
$20.00
Picture for 99380 CRITICAL REVIEW OF NAPHTHENIC ACID
Available for download

99380 CRITICAL REVIEW OF NAPHTHENIC ACID CORROSION

Product Number: 51300-99380-SG
ISBN: 99380 1999 CP
Author: Saadedine Tebbal
$20.00
Picture for 07569 Low Temperature Naphthenic Acid Corrosion Study
Available for download

07569 Low Temperature Naphthenic Acid Corrosion Study

Product Number: 51300-07569-SG
ISBN: 07569 2007 CP
Author: Alec Groysman, Naphtali Brodsky, Dmitry Schmulevich, and Yossi Pener
Publication Date: 2007
$20.00
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support