نتایج جستجو برای: metallic surfaces corrosion
تعداد نتایج: 196766 فیلتر نتایج به سال:
In an effort to better understand current test practices and improve nonclinical testing of cardiovascular metallic implants, the Food and Drug Administration (FDA) held a public workshop on Cardiovascular Metallic Implants: corrosion, surface characterization, and nickel leaching. The following topics were discussed: (1) methods used for corrosion assessments, surface characterization techniqu...
The adsorption of atomic oxygen and surfaces is the starting point key to understand oxidation process stainless steel. Nowadays, numerous studies have focused on metal composition steel, while mechanism non-metallic elements affecting needs be clarified. Here, surface pure γ-Fe H/N-containing austenitic steels was investigated using first principles. We found that stable (>6 eV) can occur s...
Multidentate macromolecules for functionalisation, passivation and labelling of metal nanoparticles.
A new class of SERRS-active macromolecule designed to protect silver nanoparticle surfaces against salt corrosion whilst retaining colloidal stability of the particles is reported.
Abstract Detrimental corrosion is an ever-concerning challenge for metals and alloys. One possible remedy to apply organic inhibitors. Despite progress in molecular assembly inhibitor research, better mechanistic insight on the level needed. Here we report behavior of well-defined artificial interfaces created by micro-contact printing thiol-inhibitor molecules subsequent backfilling. The obtai...
Metallic copper surfaces rapidly and efficiently kill bacteria. Cells exposed to copper surfaces accumulated large amounts of copper ions, and this copper uptake was faster from dry copper than from moist copper. Cells suffered extensive membrane damage within minutes of exposure to dry copper. Further, cells removed from copper showed loss of cell integrity. Acute contact with metallic copper ...
Ti40Zr10Cu36Pd14 Bulk Metallic Glass (BMG) appears very attractive for future biomedical applications thanks to its high glass forming ability, the absence of toxic elements such as Ni, Al or Be and its good mechanical properties. For the first time, a complete and exhaustive characterization of a unique batch of this glassy alloy was performed, together with ISO standard mechanical tests on ma...
the commonly used nickel-titanium (niti) archwires in orthodontic treatment are often exposed to fluoride-containing mouthwashes. the aim of this in-vitro study was to evaluate and compare the corrosion resistance of three commercially available niti archwires exposed to 0.05 wt% and 0.2 wt% fluoride mouthwashes.three different types of niti archwires, 0.016″ in diameter, from dentaurum, global...
Corrosion of metallic materials is a natural process, and our study shows that even in an alkaline environment severe corrosion may occur on a carbon steel surface. While corrosion cannot be stopped it can be retarded. Many of the traditional anti-corrosion approaches such as the chromate process are effective but hazardous to the environment and human health. Mefp-1, a protein derived from blu...
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