Materials with and without Coating-New Perspectives

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Corrosion, Wear and Erosion".

Deadline for manuscript submissions: closed (31 December 2021) | Viewed by 3829

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Scientific Independent Consultant Biomaterials and Medical Devices, 103 Paul-Vouga, 2074 Marin-Neuchâtel, Switzerland
Interests: materials; materials characterization; materials processing; biomaterials; alloys; corrosion; ceramics; toxicity; allergy; welding; coating; sintering; 3D printing in medical devices; 3D bioprinting; UE Legislation REACH; CEN; Eurométaux; Precious Metals and Rhenium; Conflict Minerals.
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Special Issue Information

Dear Colleagues,

In this Special Issue, we welcome original research papers and reviews focused on the complex relationships between the materials with and without coating, thin and thick films, surface and interfaces in their environment. In extenso we also accept corrosion and toxicology subjects concerning for this type of materials.

Corrosion, generally defined as a degradation of a material or its properties, by chemical reaction with the environment, currently affects all areas of the economy, from the integrated circuits to the reinforced concrete bridges, concerning a wide spectrum of industries. Today, the concept of corrosion has evolved in the broad sense of the word, being not limited to metals, but affecting polymers and ceramics as well. In terms of biomaterial applications, one of the major inconvenient aspects is the degradation, which occurs due to the material’s interaction with the human body or physiological fluids. The corrosion resistance can be considered a vital property for biomaterial components and it is associated with the problem of metallic ion release, potentially harmful for the organism. Allergic reactions to substances in products and devices, in both professional and private life, are a significant and growing health problem affecting large parts of the population. The corrosion and toxicity continues to attract research attention, not only because its high costs to our society, but also for its bearings on application of new and critical technologies.

Prof. Dr. Lucien Reclaru

Prof. Dr. Lavinia Cosmina Ardelean

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. Coatings 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

  • thin and thick films
  • processes for coating deposition and modification
  • characterization techniques
  • functional, protective and decorative coatings
  • coatings for high temperature
  • film materials for packaging
  • applied surface science
  • corrosion, erosion and wear
  • alloys
  • ceramics
  • polymers
  • toxicity
  • allergy
  • mutagenicity
  • carcinogens
  • sensitizers
  • Ni, Cr,..release
  • legislation

Published Papers (1 paper)

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Research

18 pages, 4344 KiB  
Article
Evaluation of Passivation Process for Stainless Steel Hypotubes Used in Coronary Angioplasty Technique
by Lucien Reclaru and Lavinia Cosmina Ardelean
Coatings 2021, 11(4), 448; https://doi.org/10.3390/coatings11040448 - 13 Apr 2021
Cited by 1 | Viewed by 2834
Abstract
In the manufacturing of hypotubes for coronary applications, austenitic steels of types 304, 304, or 316 L are being used. The manufacturing process involves bending steel strips into tubes and the continuous longitudinal welding of the tubes. Manufacturing also includes heat treatments and [...] Read more.
In the manufacturing of hypotubes for coronary applications, austenitic steels of types 304, 304, or 316 L are being used. The manufacturing process involves bending steel strips into tubes and the continuous longitudinal welding of the tubes. Manufacturing also includes heat treatments and stretching operations to achieve an external/internal diameter of 0.35/0.23 mm, with a tolerance of +/− 0.01 mm. Austenitic steels are sensitive to localized corrosion (pitting, crevice, and intergranular) that results from the welding process and various heat treatments. An extremely important step is the cleaning and the internal and external passivation of the hypotube surface. During patient interventions, there is a high risk of metal cations being released in contact with human blood. The aim of this study was to evaluate the state of passivation and corrosion resistance by using electrochemical methods and specific intergranular corrosion tests (the Strauss test). There were difficulties in passivating the hypotubes and assessing the corrosion phenomena in the interior of the tubes. Assessments were made by plotting the open circuit potential curves and exploring the polarization curves in the Tafel domain range of −50 mV vs. Ecorr (redox potential) and +150 mV vs. saturated calomel electrode (SCE, reference micro-electrode) for both the external and the internal surfaces of the hypotubes. The tested hypotubes did not exhibit intergranular corrosion, as mass losses were low and, in general, close to the limit of the analytical balance. Electrochemical techniques made the differentiation of the passivation state of the tested hypotubes possible. The measured currents were of the order of nano–pico amperes, and the quantities of electrical charges consumed for corrosion were of the order of micro–nano coulombs. Full article
(This article belongs to the Special Issue Materials with and without Coating-New Perspectives)
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