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Micromachines
Special Issues
Corrosion and Etching at Micro/Nanoscale
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Corrosion and Etching at Micro/Nanoscale

A special issue of Micromachines (ISSN 2072-666X). This special issue belongs to the section "A：Physics".

Deadline for manuscript submissions: closed (31 December 2021) | Viewed by 12795

Special Issue Editors

Dr. Giorgio Luciano

E-Mail Website
Guest Editor
Institute for Chemical Technologies, National Research Council of Italy, Rome, Italy
Interests: corrosion; superhydrophobic; nanostructures; aluminum; coatings
Special Issues, Collections and Topics in MDPI journals
Dr. Małgorzata Norek

E-Mail Website
Guest Editor
Institute of Materials Science & Engineering, Faculty of Advanced Technology & Chemistry, Military University of Technology, Warsaw, Poland
Interests: nanostructures; anodization; surface properties; optical materials
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

I am very glad to invite you to contribute to this Special Issue of Micromachines. Corrosion and etching at micro (nano) scale is an important topic in several fields, from the fabrication of sensors and membranes to investigations of the properties of micro- and nano-composites. The study of this phenomena is essential to acquire knowledge on the physical and mechanical properties of synthesized materials and their resistance to corrosion. This Special Issue is devoted to the review and discussion of all theoretical and practical aspects of these processes. Both experimental and theoretically based contributions related to fabrication via etching processes and the characterization of corrosion resistance in microdevices and composites are welcome.

Dr. Giorgio Luciano
Dr. Małgorzata Norek
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Micromachines is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Etching
  • Corrosion
  • Microdevices
  • Hierarchical materials
  • Composites

Published Papers (6 papers)

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Editorial

Jump to: Research, Review

2 pages, 158 KiB  
Editorial
Editorial for the Special Issue on Corrosion and Etching at Micro/Nanoscale
by Giorgio Luciano and Małgorzata Norek
Micromachines 2023, 14(2), 425; https://doi.org/10.3390/mi14020425 - 10 Feb 2023
Viewed by 752
Abstract
Micro- and nanoscale corrosion and etching at are important in several fields, from the fabrication of sensors and membranes to investigations of the properties of micro- and nanocomposites [...] Full article
(This article belongs to the Special Issue Corrosion and Etching at Micro/Nanoscale)

Research

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14 pages, 16469 KiB  
Article
An Experiment-Based Study of Formation Damage Using a Microetching Model Displacement Method
by Feng Wu, Jin Dai, Lei Shi, Lin Fan, Yao Guan, Yuhan Li, Qinghui Wang and Chunchao Chen
Micromachines 2022, 13(2), 270; https://doi.org/10.3390/mi13020270 - 08 Feb 2022
Cited by 1 | Viewed by 1403
Abstract
In the field of oil and gas exploration, drilling fluid is regarded as the essential “blood” for drilling, which mainly helps to control the formation pressure and remove cuttings from the well. During the drilling fluid cycle, the drilling fluid penetrates into the [...] Read more.
In the field of oil and gas exploration, drilling fluid is regarded as the essential “blood” for drilling, which mainly helps to control the formation pressure and remove cuttings from the well. During the drilling fluid cycle, the drilling fluid penetrates into the pores of the formation rock, thus blocking the rock pores and resulting in a decline in oil and gas recovery efficiency. Therefore, it is very important to understand the microscopic mechanism of formation damage caused by drilling fluid. However, as an important component of formation damage, the microscopic mechanism of fluid damage has not yet been clearly revealed. In this study, a new microetching model (MEM), along with displacement equipment, was designed. The pore network of rock samples was extracted from thin-section images and etched to a thin aluminum sheet by laser. Oil-based drilling fluid was used to displace the stratum water in the MEM. The displacement process was recorded by a camera and analyzed. A core flooding experiment, permeability measurement, and SEM observations were performed. The results show that, for low-porosity and low-permeability sandstone, the main forms of formation damage by drilling fluid include solid damage and liquid damage. Solid damage is mainly caused by the blockage of small pores and narrow throats with solid particles of the size 0.1~30.0 μm in drilling fluid, while liquid damage is mainly caused by the water lock and hydrocarbon lock effects formed by the oil–water two-phase interface, gas–water two-phase interface, or the oil–gas–water three-phase interface. Full article
(This article belongs to the Special Issue Corrosion and Etching at Micro/Nanoscale)
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11 pages, 4413 KiB  
Article
Influence of Current on Soil Corrosion of Galvanized Steel of Grounding Grids
by Linbo Song, Cheng Zhang, Jing Zhao, Rui Yang and Yuan Yuan
Micromachines 2022, 13(2), 190; https://doi.org/10.3390/mi13020190 - 26 Jan 2022
Cited by 2 | Viewed by 1945
Abstract
Grounding grid materials are vulnerable to soil corrosion, which is detrimental to the safe operation of the grounding grids and even lead to serious accidents of power transmission. In this paper, galvanized steel was used as the typical grounding grid material which was [...] Read more.
Grounding grid materials are vulnerable to soil corrosion, which is detrimental to the safe operation of the grounding grids and even lead to serious accidents of power transmission. In this paper, galvanized steel was used as the typical grounding grid material which was buried in the soil and then electrified with AC and DC current for two weeks. The corroded samples under different current conditions were characterized and compared. The experimental results show that the corrosion degree of galvanized steel gradually aggravated with the increasing of the current, especially under DC current. Further, the mechanism of the influence of current on soil corrosion is explored. It is found that under the same magnitude of current, the corrosion degree of galvanized steel under DC current is greater than that under AC current. Full article
(This article belongs to the Special Issue Corrosion and Etching at Micro/Nanoscale)
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13 pages, 7303 KiB  
Article
The Corrosion Resistance and Mechanism of AT13/Fe-Based Amorphous Composite Coatings
by Zhenhua Chu, Shikun Teng, Yuyun Zhou, Xingwei Zheng, Jingxiang Xu, Fang Wang and Baosen Zhang
Micromachines 2022, 13(1), 56; https://doi.org/10.3390/mi13010056 - 29 Dec 2021
Cited by 4 | Viewed by 1110
Abstract
Due to high strength, high wear resistance and high corrosion resistance, the amorphous metallic glasses were investigated widely. In the present study, the corrosion resistance of amorphous coating and composite coatings with various proportions of AT13 (Al2O3–13 wt.% TiO [...] Read more.
Due to high strength, high wear resistance and high corrosion resistance, the amorphous metallic glasses were investigated widely. In the present study, the corrosion resistance of amorphous coating and composite coatings with various proportions of AT13 (Al2O3–13 wt.% TiO2) ceramic as additions in 3.5 wt.% NaCl solution were studied. The corrosion resistance was improved obviously as the addition of AT13, and when the content of AT13 was 15 wt.%, the composite coating had the lowest corrosion current density (1.75 × 10−6 A cm−2) and the highest corrosion potential (−411 mV), which was 5.14 × 10−5 A cm−2 and −580 mV for Fe-based metallic glassy coating, respectively. The corrosion mechanism was proposed according to the long-time immersion corrosion test. Full article
(This article belongs to the Special Issue Corrosion and Etching at Micro/Nanoscale)
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22 pages, 3910 KiB  
Article
Optical Properties of Porous Alumina Assisted Niobia Nanostructured Films–Designing 2-D Photonic Crystals Based on Hexagonally Arranged Nanocolumns
by Andrei Pligovka, Alexander Poznyak and Małgorzata Norek
Micromachines 2021, 12(6), 589; https://doi.org/10.3390/mi12060589 - 21 May 2021
Cited by 10 | Viewed by 2776
Abstract
Three types of niobia nanostructured films (so-called native, planarized, and column-like) were formed on glass substrates by porous alumina assisted anodizing in a 0.2 M aqueous solution of oxalic acid in a potentiostatic mode at a 53 V and then reanodizing in an [...] Read more.
Three types of niobia nanostructured films (so-called native, planarized, and column-like) were formed on glass substrates by porous alumina assisted anodizing in a 0.2 M aqueous solution of oxalic acid in a potentiostatic mode at a 53 V and then reanodizing in an electrolyte containing 0.5 M boric acid and 0.05 M sodium tetraborate in a potentiodynamic mode by raising the voltage to 230 V, and chemical post-processing. Anodic behaviors, morphology, and optical properties of the films have been investigated. The interference pattern of native film served as the basis for calculating the effective refractive index which varies within 1.75–1.54 in the wavelength range 190–1100 nm. Refractive index spectral characteristics made it possible to distinguish a number of absorbance bands of the native film. Based on the analysis of literature data, the identified oxide absorbance bands were assigned. The effective refractive index of native film was also calculated using the effective-medium models, and was in the range of 1.63–1.68. The reflectance spectra of all films show peaks in short- and long-wave regions. The presence of these peaks is due to the periodically varying refractive index in the layers of films in two dimensions. FDTD simulation was carried out and the morphology of a potential 2-D photonic crystal with 92% (wavelength 462 nm) reflectance, based on the third type of films, was proposed. Full article
(This article belongs to the Special Issue Corrosion and Etching at Micro/Nanoscale)
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Review

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24 pages, 3363 KiB  
Review
Research Advances of Soil Corrosion of Grounding Grids
by Cheng Zhang, Yuxiang Liao, Xue Gao, Jing Zhao, Yuan Yuan and Ruijin Liao
Micromachines 2021, 12(5), 513; https://doi.org/10.3390/mi12050513 - 02 May 2021
Cited by 19 | Viewed by 3903
Abstract
A grounding grid plays the role of discharging current and balancing voltage to ensure the safety of the power system. However, soil corrosion can damage the grounding grid, which then can endanger the safe operation of power system. This paper reviewed recent research [...] Read more.
A grounding grid plays the role of discharging current and balancing voltage to ensure the safety of the power system. However, soil corrosion can damage the grounding grid, which then can endanger the safe operation of power system. This paper reviewed recent research advances of soil corrosion of grounding grid. The cause, mechanism, types, and influencing factors of soil corrosion of grounding grids were summarized, and the corresponding detection technology and protective measures were also introduced. The paper pointed out that soil corrosion is a serious threat to the grounding grid system. Moreover, the impact mechanism of AC stray current, new corrosion detection technology, and better protective measures still need in-depth research. Full article
(This article belongs to the Special Issue Corrosion and Etching at Micro/Nanoscale)
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