Atmospheric corrosion local electrochemical response to a dynamic saline droplet on pure Iron
The electrochemical response to a dynamic 3.5% NaCl droplet on pure iron was investigated by newly developed concentric three-electrode array measurements. The freshly covered electrode surface of the volume-expanded droplet acts as the cathode in the corrosion cell, resulting in enhanced local anod...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2019-04-01
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| Series: | Electrochemistry Communications |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1388248119300116 |
| _version_ | 1828751893503934464 |
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| author | Xiao Tang Chaoran Ma Xiaoxiao Zhou Xiaolei Lyu Qiang Li Yan Li |
| author_facet | Xiao Tang Chaoran Ma Xiaoxiao Zhou Xiaolei Lyu Qiang Li Yan Li |
| author_sort | Xiao Tang |
| collection | DOAJ |
| description | The electrochemical response to a dynamic 3.5% NaCl droplet on pure iron was investigated by newly developed concentric three-electrode array measurements. The freshly covered electrode surface of the volume-expanded droplet acts as the cathode in the corrosion cell, resulting in enhanced local anodic galvanic current density of the anode with steady area and position. As the thickness of a droplet with a constant covering area was reduced, the overall localized corrosion tendency declined, which can be attributed to a more homogeneous oxygen transfer process under a thinner droplet. The results suggest that dynamic droplets with increasing area coverage could promote and accelerate the initiation and propagation of atmospheric corrosion; whereas, the thinning droplets from its original geometry to a thin electrolyte film with an average thickness of 440 μm could decrease the tendency for localized corrosion. Keywords: Iron, Atmospheric corrosion, Dynamic droplet, Local electrochemical response, Concentric three-electrode Array |
| first_indexed | 2024-12-10T21:00:23Z |
| format | Article |
| id | doaj.art-02b1714d087a40a294e6f2d74d374cdc |
| institution | Directory Open Access Journal |
| issn | 1388-2481 |
| language | English |
| last_indexed | 2024-12-10T21:00:23Z |
| publishDate | 2019-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Electrochemistry Communications |
| spelling | doaj.art-02b1714d087a40a294e6f2d74d374cdc2022-12-22T01:33:49ZengElsevierElectrochemistry Communications1388-24812019-04-011012834Atmospheric corrosion local electrochemical response to a dynamic saline droplet on pure IronXiao Tang0Chaoran Ma1Xiaoxiao Zhou2Xiaolei Lyu3Qiang Li4Yan Li5School of Materials Science and Engineering, China University of Petroleum (Huadong), Qingdao 266580, China; Corresponding author.School of Materials Science and Engineering, China University of Petroleum (Huadong), Qingdao 266580, ChinaSchool of Materials Science and Engineering, China University of Petroleum (Huadong), Qingdao 266580, ChinaSchool of Materials Science and Engineering, China University of Petroleum (Huadong), Qingdao 266580, ChinaCollege of Pipeline and Civil Engineering, China University of Petroleum (Huadong), Qingdao 266580, ChinaSchool of Materials Science and Engineering, China University of Petroleum (Huadong), Qingdao 266580, ChinaThe electrochemical response to a dynamic 3.5% NaCl droplet on pure iron was investigated by newly developed concentric three-electrode array measurements. The freshly covered electrode surface of the volume-expanded droplet acts as the cathode in the corrosion cell, resulting in enhanced local anodic galvanic current density of the anode with steady area and position. As the thickness of a droplet with a constant covering area was reduced, the overall localized corrosion tendency declined, which can be attributed to a more homogeneous oxygen transfer process under a thinner droplet. The results suggest that dynamic droplets with increasing area coverage could promote and accelerate the initiation and propagation of atmospheric corrosion; whereas, the thinning droplets from its original geometry to a thin electrolyte film with an average thickness of 440 μm could decrease the tendency for localized corrosion. Keywords: Iron, Atmospheric corrosion, Dynamic droplet, Local electrochemical response, Concentric three-electrode Arrayhttp://www.sciencedirect.com/science/article/pii/S1388248119300116 |
| spellingShingle | Xiao Tang Chaoran Ma Xiaoxiao Zhou Xiaolei Lyu Qiang Li Yan Li Atmospheric corrosion local electrochemical response to a dynamic saline droplet on pure Iron Electrochemistry Communications |
| title | Atmospheric corrosion local electrochemical response to a dynamic saline droplet on pure Iron |
| title_full | Atmospheric corrosion local electrochemical response to a dynamic saline droplet on pure Iron |
| title_fullStr | Atmospheric corrosion local electrochemical response to a dynamic saline droplet on pure Iron |
| title_full_unstemmed | Atmospheric corrosion local electrochemical response to a dynamic saline droplet on pure Iron |
| title_short | Atmospheric corrosion local electrochemical response to a dynamic saline droplet on pure Iron |
| title_sort | atmospheric corrosion local electrochemical response to a dynamic saline droplet on pure iron |
| url | http://www.sciencedirect.com/science/article/pii/S1388248119300116 |
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