Microbiological influence on the electro-chemical potential of stainless steel

The microbiologically caused ennoblement appears in natural water on all stainless steels equally and can only be prevented by the use of biocides. Temperature and supply of nutrients have an influence on the increasing rate of the potential, as well as the presence of manganese ions in the water fa...

Full description

Saved in:
Bibliographic Details
Published in:Materials and corrosion 2006-09, Vol.57 (9), p.715-723
Main Authors: Gümpel, P., Arlt, N., Telegdi, J., Schiller, D., Moos, O.
Format: Article
Language:English
Subjects:
Applied sciences
biological system
Corrosion
Corrosion environments
ennoblement
Exact sciences and technology
Metals. Metallurgy
microbial influenced corrosion
passive layer
selective corrosion
stainless steel
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The microbiologically caused ennoblement appears in natural water on all stainless steels equally and can only be prevented by the use of biocides. Temperature and supply of nutrients have an influence on the increasing rate of the potential, as well as the presence of manganese ions in the water favors the potential rise. The final value of the potential is substantially regulated by the biological system and is independent of the steel composition. An endangerment of stainless steels by a selective corrosion attack e.g. pitting corrosion arises if the critical repassivation potential of the steel lies below the open‐circuit potential appearing in the natural system. This can be due to the alloy composition or due to process‐conditioned weakening of the passive layer, for example by annealing colors on and beside welded joints.
ISSN:0947-5117
1521-4176
DOI:10.1002/maco.200503962