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Some surface-related aspects of the cleaning of new and reused stainless-steel surfaces fouled by protein

Karlsson, Camilla A-C LU ; Wahlgren, Marie C LU and Trägårdh, Christian LU (1998) In International Dairy Journal 8(10). p.925-933
Abstract (Swedish)
The adsorption of β-lactoglobulin to stainless steel and its subsequent alkali-induced removal were followed using ellipsometry. New steel samples differing in bulk composition, surface finish or chemical pretreatment were used. All surfaces were precleaned in strongly alkaline solution, and some were subsequently passivated in nitric acid. Furthermore, on surfaces differing in pretreatment measurements were performed during repeated fouling and cleaning cycles. No correlation was found between the bulk composition or the surface finish and the fouling tendency or the cleanability. However, striking differences in cleanability between stainless-steel surfaces subjected to different chemical pretreatments were evident, particularly at low... (More)
The adsorption of β-lactoglobulin to stainless steel and its subsequent alkali-induced removal were followed using ellipsometry. New steel samples differing in bulk composition, surface finish or chemical pretreatment were used. All surfaces were precleaned in strongly alkaline solution, and some were subsequently passivated in nitric acid. Furthermore, on surfaces differing in pretreatment measurements were performed during repeated fouling and cleaning cycles. No correlation was found between the bulk composition or the surface finish and the fouling tendency or the cleanability. However, striking differences in cleanability between stainless-steel surfaces subjected to different chemical pretreatments were evident, particularly at low temperature. Still, only minor effects on the fouling tendency were observed. When subjecting surfaces to repeated fouling and cleaning without renewed pretreatment, the differences in cleaning performance decreased but were still significant. While the cleanability of non-passivated surfaces appeared to decrease somewhat when reused, changes seemed smaller for passivated surfaces. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
International Dairy Journal
volume
8
issue
10
pages
9 pages
publisher
Elsevier
external identifiers
  • scopus:0032419192
ISSN
0958-6946
DOI
10.1016/S0958-6946(99)00009-6
language
English
LU publication?
yes
id
ac058e18-fb7f-422c-ad8f-4b5eb57bbc6e
date added to LUP
2016-04-15 19:29:24
date last changed
2017-05-03 19:31:50
@article{ac058e18-fb7f-422c-ad8f-4b5eb57bbc6e,
  abstract     = {The adsorption of β-lactoglobulin to stainless steel and its subsequent alkali-induced removal were followed using ellipsometry. New steel samples differing in bulk composition, surface finish or chemical pretreatment were used. All surfaces were precleaned in strongly alkaline solution, and some were subsequently passivated in nitric acid. Furthermore, on surfaces differing in pretreatment measurements were performed during repeated fouling and cleaning cycles. No correlation was found between the bulk composition or the surface finish and the fouling tendency or the cleanability. However, striking differences in cleanability between stainless-steel surfaces subjected to different chemical pretreatments were evident, particularly at low temperature. Still, only minor effects on the fouling tendency were observed. When subjecting surfaces to repeated fouling and cleaning without renewed pretreatment, the differences in cleaning performance decreased but were still significant. While the cleanability of non-passivated surfaces appeared to decrease somewhat when reused, changes seemed smaller for passivated surfaces.},
  author       = {Karlsson, Camilla A-C and Wahlgren, Marie C and Trägårdh, Christian},
  issn         = {0958-6946},
  language     = {eng},
  number       = {10},
  pages        = {925--933},
  publisher    = {Elsevier},
  series       = {International Dairy Journal},
  title        = {Some surface-related aspects of the cleaning of new and reused stainless-steel surfaces fouled by protein},
  url          = {http://dx.doi.org/10.1016/S0958-6946(99)00009-6},
  volume       = {8},
  year         = {1998},
}