کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1468717 | 1510008 | 2014 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: In situ pH responsive fluorescent probing of localized iron corrosion In situ pH responsive fluorescent probing of localized iron corrosion](/preview/png/1468717.png)
• Fluorescence imaging based corrosion detection method was developed.
• Time and spatial resolutions of 125 ms and <1 μm respectively were achieved.
• Incipient corrosion pits on iron surfaces in salt solutions were observed.
• Corrosion pits preferentially forms along surface features such as scratches.
A fast and versatile method has been demonstrated to detect the early stage of iron corrosion in situ, with minimum external perturbation, by using a pH sensitive fluorescence dye. The decreasing fluorescence intensity inside corrosion pits induced by hydrogen ions produced during iron corrosion is used as a signal indicator. Identification of corrosion pits (with resolution of <1 μm) and quantification of corrosion rate based on local hydrogen concentration were achieved. The developed technique has been applied to show that surface roughness, under a constant current condition, influences the corrosion of iron. Corrosion occurs preferentially adjacent to local topographic features.
Journal: Corrosion Science - Volume 87, October 2014, Pages 118–126