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97512 CORROSION MONITORING AND CONTROL IN REFINERY PROCESS UNITS

Picture for 97512 CORROSION MONITORING AND CONTROL
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Product Number: 51300-97512-SG
ISBN: 97512 1997 CP
Author: Alec Groysman, Avihu Hiram
Industry: Materials Selection and Design
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This paper describes the experience gained in “corrosion monitoring” in the overhead systems of three crude distillation units of a refinery in Haifa, Israel. The data of electrical resistance (ER) probes, connected to an on-line data acquisition system were compared with the mass loss method and chemical analysis of accumulated sour water tier condensation in the overhead system. SEM & EDS analysis of films and deposits formed on the coupons showed that iron sulfide with impurities of chlorides are responsible for the comosion extent. The corrosion was less than 5 MPY when a uniform tenacious iron sulfide films of 10-50 microns thickness were formed. The severe corrosion occurred when deposits and non-uniform films of more than 80- 100 microns thickness were formed. Special attention was given to ER probes which were connected on-line to the process units and enabled the operators to react immediately to any change in corrosion rates. KEYWORDS: corrosion monitoring, crude distillation unit, mass loss method (coupons), electrical resistance (ER) probes, on-line corrosion monitoring system, Distributed Control System (DCS), accumulated condensed sour water.
This paper describes the experience gained in “corrosion monitoring” in the overhead systems of three crude distillation units of a refinery in Haifa, Israel. The data of electrical resistance (ER) probes, connected to an on-line data acquisition system were compared with the mass loss method and chemical analysis of accumulated sour water tier condensation in the overhead system. SEM & EDS analysis of films and deposits formed on the coupons showed that iron sulfide with impurities of chlorides are responsible for the comosion extent. The corrosion was less than 5 MPY when a uniform tenacious iron sulfide films of 10-50 microns thickness were formed. The severe corrosion occurred when deposits and non-uniform films of more than 80- 100 microns thickness were formed. Special attention was given to ER probes which were connected on-line to the process units and enabled the operators to react immediately to any change in corrosion rates. KEYWORDS: corrosion monitoring, crude distillation unit, mass loss method (coupons), electrical resistance (ER) probes, on-line corrosion monitoring system, Distributed Control System (DCS), accumulated condensed sour water.
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Picture for 10183 Prediction and Assessment of Rich Amine Corrosion Under Simulated Refinery Conditions
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10183 Prediction and Assessment of Rich Amine Corrosion Under Simulated Refinery Conditions

Product Number: 51300-10183-SG
ISBN: 10183 2010 CP
Author: Vishal V. Lagad, Michael S. Cayard and Sridhar Srinivasan
Publication Date: 2010
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Experimental results and findings from a joint industry program entitled “Prediction and Assessment of Corrosion in Amine Solvents” conducted over the period from March 2003 to May 2007. An overview of experimental methods, observed results and trends, as well as comparison of predicted corrosion rates to refinery field data.
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