Dissimilar metal crevice corrosion of highly alloyed stainless steel
Book
·
OSTI ID:82993
- Univ. of Virginia, Charlottesville, VA (United States)
Highly alloyed stainless steels can suffer from dissimilar metal crevice corrosion when creviced with certain other stainless alloys. In order to understand this phenomenon better, the solution which forms inside such crevices was collected and analyzed with ion chromatography and capillary electrophoresis for its metal ion content. These analyses provided the data required to design bulk solutions for electrochemical measurements. Electrochemical measurements in these simulated crevice solutions were made and compared to measurements made in simple acidified chloride solutions. The simulated crevice solutions were found to be much more aggressive. These results are used to rationalize the observations of dissimilar metal crevice corrosion of Alloy S44735 when it is creviced with Type 316 and the failure of electrochemical measurements in simple acidified chloride solutions to predict this attack. The roles of ohmic drop and chloride ion concentration are considered.
- OSTI ID:
- 82993
- Report Number(s):
- CONF-940222--
- Country of Publication:
- United States
- Language:
- English
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