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Discussion Forums - The Hendrix Group
HomeHomeDiscussionsDiscussionsMaterial Select...Material Select...STAINLESS STEEL PITTING CORROSIONSTAINLESS STEEL PITTING CORROSION
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12/13/2002 9:00 AM
 
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Good morning Could somebody tell me if pitting corrosion can be an anaerobic corrosion mechanism ? Indeed, I have some pumps carrying MEG (mono ethyl%E8ne glycol) containing produced water (high chlorides content), which are made of 17-4 PH martensitic SS. Is there a risk of pitting corrosion knowing that there is no oxygen in the system (and no oxygen entry is foreseen). thanks in advance for your replies.
 
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12/15/2002 9:00 AM
 
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Dear Sir: Are you certain that there is no oxygen in the system? Based on your stated environment of high chlorides, MEG vs. 17-4 pH SS pitting corrosion could be a potential problem, especially if deposits were present. Anerobes tend to produce their own environment, depending on the type, and they normally act as deposits to create concentration cells. Hope this helps! David Hendrix The Hendrix Group Inc.
 
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12/20/2002 9:00 AM
 
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I would have to look at all of the possible reactions that you can get with high chlorine and ethylen glycol (which does contain oxygen, of course). This is certainly not an easy environment even for a very high grade of stainless. With 17-4 I would not be surprised to see problems. I have no data to substantiate this.
 
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