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Wednesday, March 19, 2008 - 4:15 PM
Convention Center, Second Level, R08 (Ernest N. Morial Convention Center)
08408
The Effect of Pressure on Hydrogen Charging of Carbon Steel Under Cathodic Protection
The mechanism of hydrogen uptake by steel in various environments is reviewed, in order to understand their propensity to cause hydrogen damage, as indicated by hydrogen entry activities at the steel sub-surface. We then consider whether hydrogen damage is likely to be induced in cathodically protected steel, supported by new and previously published data. It is concluded that cathodic protection of steel in environments not containing hydrogen promoters such as sour gas probably generates hydrogen activities not exceeding ambient pressure. The hydrogen activity in the deep sea, at 400 bar, is considered low in comparison with activities commonly associated with sour environments, but it might induce cracking in an already highly hydrogen susceptible weldment, say. A mild charging solution is suggested to simulate the hydrogen charging activity induced by cathodic protection sub-sea.
See more of Hydrogen Permeation Measurements and Applications
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See more of The CORROSION 2008 Conference and Expo (March 16-20, 2008)
See more of Technical Symposium
See more of The CORROSION 2008 Conference and Expo (March 16-20, 2008)