Detection and quantification of defect evolution at buried metal-oxide-polymer interface on rough substrate by local electrochemical impedance mapping

Sanchez, Thomas; Kurchavova, E.; Shkirskiy, Viacheslav; Światowska, Jolanta; Vivier, Vincent; Volovitch, P.

doi:10.1016/j.electacta.2021.138467

Cited by 7 publications

(4 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To study the resistance of the films to cathodic polarization, a cyclic test with interleaved EIS measurements was performed. Cathodic polarization stresses organic coatings, and its use is common practice in the characterization of organic coating performance. − In a first sequence, six cycles of cathodic polarization at −1 V with respect to initial OCP were performed for 10 min each cycle, followed by a relaxation period of 60 s, and the recording of EI spectra after each period with polarization. In a second sequence, six cycles of cathodic polarization at −3 V with respect to initial OCP were performed for 10 min each, with their respective EIS monitoring measurements.…”

Section: Methodsmentioning

confidence: 99%

Molybdate and Phosphate Cross-Linked Chitosan Films for Corrosion Protection of Hot-Dip Galvanized Steel

Fernández-Solis,

Keil,

Erbe

2023

ACS Omega

View full text Add to dashboard Cite

Environmentally friendly and sustainable methods to protect hot-dip galvanized (HDG) steel from corrosion are extensively studied. Films of the biopolymer polyelectrolyte chitosan were ionically cross-linked in this work with the wellknown corrosion inhibitors phosphate and molybdate. Layers on this basis are presented as components in a protective system and could, e.g., be applied in pretreatments similar to a conversion coating. For the preparation of the chitosan-based films, a procedure involving sol−gel chemistry and wet-wet application was utilized. Homogeneous films of few micrometers thickness were obtained on HDG steel substrates after thermal curing. Properties of chitosan-molybdate and chitosan-phosphate films were compared with purely passive epoxysilane-cross-linked chitosan, and pure chitosan. Delamination behavior of a poly(vinyl butyral) (PVB) weak model top coating studied by scanning Kelvin probe (SKP) showed an almost linear time dependence over >10 h on all systems. Delamination rates were 0.28 mm h −1 (chitosan-molybdate) and 0.19 mm h −1 (chitosan-phosphate), ca. 5% of a non-cross-linked chitosan reference and slightly higher than of the epoxsyilane cross-linked chitosan. Immersion of the treated zinc samples over 40 h in 5% NaCl solution yielded a 5-fold increase of the resistance in the chitosan-molybdate system, as evidenced by electrochemical impedance spectroscopy (EIS). Ion exchange of electrolyte anions with molybdate and phosphate triggers corrosion inhibition, presumably by reaction with the HDG surface as well described in the literature for these inhibitors. Thus, such surface treatments have potential for application, e.g., in temporary corrosion protection.

show abstract

Section: Methodsmentioning

confidence: 99%

Molybdate and Phosphate Cross-Linked Chitosan Films for Corrosion Protection of Hot-Dip Galvanized Steel

Fernández-Solis,

Keil,

Erbe

2023

ACS Omega

View full text Add to dashboard Cite

show abstract

“…At the same time, the method has stable performance and can accurately differentiate and identify a variety of types of metal welds. Literature [14] shows that the chemical stability of the thin-layer interface is significantly reduced only after the trivalent chromium conversion coating has rusted to a certain degree. Literature [15] investigated the steel surface descaling technology based on an ultraviolet nanosecond laser, and the results showed that the descaling method produces less pollution, the descaling efficiency is very high and can strengthen the corrosion resistance of metallic steel surface after descaling.…”

Section: Introductionmentioning

confidence: 99%

Laser Descaling Area Recognition Method Based on LabVIEW and Machine Vision

Gao,

Zhao,

Shangguan

et al. 2024

Applied Mathematics and Nonlinear Sciences

View full text Add to dashboard Cite

Automated laser descaling represents a crucial advancement in marine maintenance, particularly in localized corrosion treatment. This research utilizes AH32 marine steel for corrosion testing, applying color feature extraction and the OTSU thresholding method, refined with morphological processing, to accurately delineate descaling areas. We have engineered a laser descaling protocol with an impressive 97% recognition accuracy through the innovative application of LabVIEW technology combined with machine vision. Implementing this technology promises enhanced corrosion resistance for marine vessels, setting a new standard for maintenance efficiency and quality.

show abstract

“…Immediately after the identified zone was analyzed with LEIM to extract size and nature (anode or cathode) of electrochemical zones. [30] Similar strategy was also employed in coupling RM with in-situ Raman mapping during Mg corrosion: RM was used to spot the region of interest while Raman allowed probing the effect of pH on the Mg surface film evolution. [32] Up to very recent years, the quantitative analysis of optical images from TLM observations was limited to counting the number of pixels and converting it to the surface area suspected to corrosion.…”

Section: Introductionmentioning

confidence: 99%

“…[17,[26][27][28][29] In-situ local electrochemical impedance microscopy (LEIM) was guided with TLM surface observations during delamination of polymer on Zn-based substrate. [30,31] The appearance of defects in polymer is stochastic and could be anticipated in advance, while the analysis of the whole studied interface is time-consuming with scanning methods such as LEIM. Therefore, TLM was used, as an intelligent instrument, to spot the region of interest with initial activity from large-view observations apparent from the bubble formation or/and change in the pixels contrast.…”

Section: Introductionmentioning

confidence: 99%

Reflective microscopy for mechanistic insights in corrosion research

Shkirskiy

Kanoufi

2022

Preprint

View full text Add to dashboard Cite

Reflective microscopy (RM) is a robust, label free optical imaging technique that allows fast operando measurements of structural changes on metal interfaces at nanoscale in a wide field. Based on the analysis of the reflected light, RM can be simply understood as “video camera” to produce optical photographs of studied interfaces and thus, it has been used for many years as a complementary tool for the visual inspection. However, recent developments in the optical models and refining the experimental design provided means for the quantitative conversion of reflected light intensities into the variations in roughness, thickness of surface films, chemical composition etc., all indispensable for the surface sciences. This review highlights recent advances and contemporary challenges in the methodological developments of RM specifically tailored for the corrosion research.

show abstract

Detection and quantification of defect evolution at buried metal-oxide-polymer interface on rough substrate by local electrochemical impedance mapping

Cited by 7 publications

References 45 publications

Molybdate and Phosphate Cross-Linked Chitosan Films for Corrosion Protection of Hot-Dip Galvanized Steel

Molybdate and Phosphate Cross-Linked Chitosan Films for Corrosion Protection of Hot-Dip Galvanized Steel

Laser Descaling Area Recognition Method Based on LabVIEW and Machine Vision

Reflective microscopy for mechanistic insights in corrosion research

Contact Info

Product

Resources

About