Shida Zhang, Yingyue Yin*, Shuaihang Pan*, Wenyu Liu, Weiguang Su, Xianfu Liu, Jianhua Zhang and Fulan Wei*,
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引用次数: 0
Abstract
Electrochemical polishing (ECP) has been conducted in a novel, environmentally friendly deep eutectic solvent (DES) electrolyte of NaCl-glycol to remarkably improve the polishing efficiency and significantly reduce localized corrosion regions of the wrought nickel (Ni)-based superalloy Hastelloy X (HX). Critical secondary passivation behavior has been systematically investigated in the DES electrolyte, combining advanced characterization techniques of electrochemical polarization, electrochemical impedance spectroscopy (EIS), X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), and scanning electron microscopy (SEM). The ECP performance in the DES electrolyte was compared to that of the NaCl aqueous solution. The samples’ surface roughness (Ra) decreased from 2.40 ± 0.10 μm to 0.23 ± 0.10 μm (at low current density) and 0.36 ± 0.10 μm (at high current density) in DES solution following ECP, respectively. The surface hardness slightly changed from 234.10 ± 2.30 HV to 226.70 ± 2.50 HV and 224.20 ± 2.50 HV in DES solution after ECP at corresponding low and high current density, primarily attributed to residual stress relief. A qualitative model was developed to relate electrolyte characteristics to polishing surface evolution, providing insights into the design of green ECP processes for aerospace-grade superalloys.
期刊介绍:
Langmuir is an interdisciplinary journal publishing articles in the following subject categories:
Colloids: surfactants and self-assembly, dispersions, emulsions, foams
Interfaces: adsorption, reactions, films, forces
Biological Interfaces: biocolloids, biomolecular and biomimetic materials
Materials: nano- and mesostructured materials, polymers, gels, liquid crystals
Electrochemistry: interfacial charge transfer, charge transport, electrocatalysis, electrokinetic phenomena, bioelectrochemistry
Devices and Applications: sensors, fluidics, patterning, catalysis, photonic crystals
However, when high-impact, original work is submitted that does not fit within the above categories, decisions to accept or decline such papers will be based on one criteria: What Would Irving Do?
Langmuir ranks #2 in citations out of 136 journals in the category of Physical Chemistry with 113,157 total citations. The journal received an Impact Factor of 4.384*.
This journal is also indexed in the categories of Materials Science (ranked #1) and Multidisciplinary Chemistry (ranked #5).