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Discussion Forums - The Hendrix Group
HomeHomeDiscussionsDiscussionsOil Refinery Co...Oil Refinery Co...Heat exchanger corrosion damageHeat exchanger corrosion damage
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6/23/2004 9:00 AM
 
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Hi, Working on the corrosion damage of a heat exchanger of oil refinery, I was surprised to find: crevice corrosion, corrosion erosion, galvanic corrosion and pitting corrosion. The heat exchanger is made of carbon steel with copper-nickel tubes. My question: in the conditions of oil refining what are the chemical agents responsible for these different types of corrosion. I suspect water is not present and oxigen limited. Many thanks Alexis
 
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6/26/2004 9:00 AM
 
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Alexis: An aqueous medium will always be present with the corrosion mechanisms that you have described. As to the constituents causing the corrosion, you need to state the unit you are working on and understand the specific environment local to the exchanger. The type of crude can also influence corrosion severity, depending on the unit. Hope this helps! David Hendrix The Hendrix Group Inc.
 
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3/16/2005 9:00 AM
 
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It's not unusual to find corrosion problems in CS shell where tubes are of much nobler material. These problems are more experienced in O/H condensers where lighter hydrocarbon vapors ex-fractionator Column condense. Please provide more details so we can contribute. Regards PLC
 
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3/17/2005 9:00 AM
 
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Alex Please supply the forum the process fluids in tube and shell side, in what regions you have observed the various corrosion mechanisms you described. Possibly more helpful hints and ideas will fall thorugh.
 
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3/22/2005 9:00 AM
 
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If your tube sheet and baffles are in CS and your tubes are in copper-nickel there is a great possibility to have galvanic corrosion, the other corrosion types would be related with circulating fluids, Ph, flow velocity and design of the exchanger, let me know in more detail what is your problem and maybe I could help Regards Luis Marques :)
 
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