Fabrication of Scanning Micro Cl~- Probe and in Situ Imaging of Cl~- at the Interface of 2024 Al Aloy/Solution

Authors

Yu-Hua LIN, State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry Xiamen University,Xiamen 361005;
Min-Hua SHAO, State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry Xiamen University,Xiamen 361005;
Rong-Gang HU, State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry Xiamen University,Xiamen 361005;
Yan LI, State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry Xiamen University,Xiamen 361005;
Rong-Gui DU, State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry Xiamen University,Xiamen 361005;
Chang-Jian LIN, State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry Xiamen University,Xiamen 361005;

Corresponding Author

Chang_Jian LIN

Abstract

Micro combination Ag/AgCl electrode with a tip measuring tens micron in diameter was fabricated. The probe satisfied in situ imaging of Cl - distribution at metal surface in chloride solution because of its excellent linearity between potential and Cl - concentration, rapid response, good stability and selectivity. With the aid of the home made Micro Electrode Scanning system and scanning Cl - probe, the effect of the [Cl - ] at 2024_Al/solution interface on localized corrosion process was investigated. It was demonstated directly that Cl - ion in solution immigrated toward, then adsorbed preferentially and accumulated at the junction between the Al_Cu_Mg secondary phase and Al matrix, the uneven distribution of Cl - accelerated the initiation and development of localized corrosion of 2024_al alloy in Cl - containing solution.

Keywords

Al alloy, Localized corrosion, Chloride ions distribution, Combination Cl - microelectrode

DOI Link

https://doi.org/10.61558/2993-074X.1516

Publication Date

2003-08-28

Online Available Date

2003-08-28

Revised Date

2003-08-28

Received Date

2003-08-28

Recommended Citation

Yu-Hua LIN, Min-Hua SHAO, Rong-Gang HU, Yan LI, Rong-Gui DU, Chang-Jian LIN. Fabrication of Scanning Micro Cl~- Probe and in Situ Imaging of Cl~- at the Interface of 2024 Al Aloy/Solution[J]. Journal of Electrochemistry, 2003 , 9(3): 280-286.
DOI: 10.61558/2993-074X.1516
Available at: https://jelectrochem.xmu.edu.cn/journal/vol9/iss3/4