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The analysis of a single pit behavior on iron in various media (sulfuric acid, borate buffer, and potassium hydroxide solutions) is reported. The use of SECM technique to generate a single pit has allowed usual electrochemical techniques to be applied. Electrochemical impedance spectroscopy was used to characterize the pit propagation. In acidic solution, the pit returned to its passive state quickly...
The local breakdown of the iron passive layer and the resulting pitting corrosion of iron were studied for massive material and for a thin film on an electrochemical quartz crystal microbalance (EQCM). The initiation and the propagation of a single pit on iron were controlled through the local production of chloride anion thanks to the silver chloride reduction at the tip of the scanning electrochemical...
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