𝔖 Bobbio Scriptorium
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Ennoblement of stainless steel in natural seawater – A new explanation

✍ Scribed by L. Xiangbo; W. Jia; W. Wei; W. Hongren

Publisher
John Wiley and Sons
Year
2007
Tongue
German
Weight
176 KB
Volume
58
Category
Article
ISSN
0947-5117

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✦ Synopsis

The ennoblement of corrosion potential (E corr ) of passive metal immersed in seawater was investigated with electrochemical technology and epifluorescence microscopy. The in situ observation showed that the bacteria number increased on the metal surface according to an exponential law which was in the same way with the ennoblement of E corr . At the same time, the anodic polarization cur-rent of high-Mo stainless steel decreased in the initial days. According to the mix-potential theory and the characteristics of polarization curves of high-Mo steel in natural seawater, the ennoblement of corrosion potential may be induced by the decrease of the passive current density.

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