2026-10-06T05:02:08Z https://api.figshare.com/v2/oai

oai:figshare.com:article/33719347 2026-10-01T01:18:58Z category_43791 portal_791 item_type_3 month_year_10_2026

Aperture-Limited Impedance Measurements on Copper Tubes with General and Ant-Nest Corrosion Using a Flexible Sticker-Type Three-Electrode Device (Supporting Information) Isao SHITANDA (22326749) Yuri OKAMOTO (24868555) Noya LOEW (23247661) Kuniaki NAGAMINE (17757588) Hikari WATANABE (22326756) Naoji MATSUHISA (24868563) Masayuki ITAGAKI (22326759) Chemistry Ant-nest Corrosion Electrochemical Impedance Spectroscopy Aperture-limited Impedance Measurement Screen-printed Electrode <p dir="ltr">Ant-nest corrosion in copper tubes develops as branched tunnels beneath an almost intact outer surface; therefore, measurement from the outside without cutting the tube is of practical interest. In this proof-of-concept study, a flexible sticker-type three-electrode device was attached to the curved outer surface of corroded copper tubes to acquire aperture-limited impedance spectra without cutting the tubes or constructing an immersion cell. The measured area was defined by a circular aperture of 1 mm radius. Specimens with independently confirmed general-corrosion and ant-nest-corrosion morphologies produced different frequency-dependent spectral structures. The general-corrosion reference specimen gave a broad arc-like response without a persistent small-slope segment. For the ant-nest-corroded specimen, a high-frequency feature tentatively associated with a corrosion-product film was followed by a quasi-linear segment in the intermediate-frequency region, with an apparent slope angle of 10.0°. This angle is reported as a descriptive parameter of the selected spectral interval and is not used to determine the number of branching generations. These results demonstrate the feasibility of aperture-limited impedance measurement on curved copper-tube surfaces.</p> 2026-10-01T00:00:00Z Dataset Dataset 10.50892/data.electrochemistry.33719347.v1 https://figshare.com/articles/dataset/Aperture-Limited_Impedance_Measurements_on_Copper_Tubes_with_General_and_Ant-Nest_Corrosion_Using_a_Flexible_Sticker-Type_Three-Electrode_Device_Supporting_Information_/33719347 CC BY 4.0