Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.13/25225

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Title
Effect of alloying on maximum depth of pits in mild steel in marine immersion environments
Author/Creator
Melchers, Robert E.
Description
Laboratory studies have shown the influence of alloying on the pitting potential of modem mild- and low-alloy structural steels in a marine immersion environment. A similar effect would be expected in field studies, although these have not been able to isolate the effect of alloying on maximum pit depth as a function of time, and correlation studies have been inconclusive. It is argued here that the reasons for this are twofold. One is that the nature of the pitting mechanics changes with time from micropitting as typically observed in laboratory studies to macropitting as seen infield studies. The second reason is that, so far, efforts at correlating field data have attempted to use a simplistic model for the growth of maximum pit depth as a function of time. A more realistic model that distinguishes between the corrosion mechanics in different phases has been introduced recently. This is applied to the literature data. It has been discovered that the effects of alloying depend on the corrosion phase. A summary of the effect of alloying on each phase of the model is given here based on data reported in the literature.
Relation
Corrosion Vol. 61, no. 4, p. 355-363
Date
2005
Publisher
National Association of Corrosion Engineers
Keyword(s)
alloys;  anaerobic conditions;  composition;  immersion;  macropitting;  marine environments;  micropitting;  pitting;  pitting corrosion;  part 1
Resource Type
journal article
Identifier
http://hdl.handle.net/1959.13/25225
Identifier
ISSN:0010-9312
Language
eng
Reviewed
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Subject
"Corrosion"
 
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