Flow corrosion behaviour of austenitic stainless steels UNS S30403 and UNS S31603
Flow corrosion behaviour of austenitic stainless steels UNS S30403 and UNS S31603
Metastable pitting behavior for two grades of austenitic stainless steels, Type 304L (UNS S30403) and Type 316L (UNSS31603), has been investigated for a range of controlled hydrodynamic conditions: static, laminar, and turbulent (Reynolds numbers of 1,000, 2,000, 3,000, 10,000, 50,000,and 75,000). Metastable pitting was evident under all flow regimes. Stable pit growth was most evident for laminar flow conditions immediately before the transition to turbulent flow and during the approach to the so-called “critical velocity” (~1.5 m/s) at Reynolds numbers of approximately 2,000 and 50,000, respectively. The corrosion behavior of the two austenitic stainless steels has been compared with a superduplex stainless steel, UNS S32760, exposed to the same hydrodynamic conditions.
critical velocity, electrochemical noise, hydrodynamics, pipe fl ow, pitting, stainless steel
792-806
Wharton, J.A.
965a38fd-d2bc-4a19-a08c-2d4e036aa96b
Wood, R.J.K.
d9523d31-41a8-459a-8831-70e29ffe8a73
2005
Wharton, J.A.
965a38fd-d2bc-4a19-a08c-2d4e036aa96b
Wood, R.J.K.
d9523d31-41a8-459a-8831-70e29ffe8a73
Wharton, J.A. and Wood, R.J.K.
(2005)
Flow corrosion behaviour of austenitic stainless steels UNS S30403 and UNS S31603.
Corrosion, 61, .
Abstract
Metastable pitting behavior for two grades of austenitic stainless steels, Type 304L (UNS S30403) and Type 316L (UNSS31603), has been investigated for a range of controlled hydrodynamic conditions: static, laminar, and turbulent (Reynolds numbers of 1,000, 2,000, 3,000, 10,000, 50,000,and 75,000). Metastable pitting was evident under all flow regimes. Stable pit growth was most evident for laminar flow conditions immediately before the transition to turbulent flow and during the approach to the so-called “critical velocity” (~1.5 m/s) at Reynolds numbers of approximately 2,000 and 50,000, respectively. The corrosion behavior of the two austenitic stainless steels has been compared with a superduplex stainless steel, UNS S32760, exposed to the same hydrodynamic conditions.
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Published date: 2005
Keywords:
critical velocity, electrochemical noise, hydrodynamics, pipe fl ow, pitting, stainless steel
Organisations:
Engineering Sciences
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Local EPrints ID: 23341
URI: http://eprints.soton.ac.uk/id/eprint/23341
PURE UUID: 5f84ed51-baa7-4e0d-b83b-e7db2a7dc6f8
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Date deposited: 12 Feb 2007
Last modified: 12 Dec 2021 03:02
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