A water compatible molecularly imprinted polymers ( MIP s) coated stir bar for bisphenol BPA ) was prepared with 3,3′,5,5′‐tetrabromobisphenol as the dummy template molecule in this study. The DMIP s‐ SB showed better selectivity than bars polydimethylsiloxane or non‐imprinted when used to extract and its three analogues. saturated adsorption amount of s coating 3.0 times over that coating. To achieve optimum extraction performance, several parameters, including desorption time, p H value,...

To extend the service life of 316L stainless steel components in harsh environments, this study utilized laser cladding technology to enhance hardness, wear resistance, and corrosion resistance surface. Nickel-based cobalt-based layers were prepared on surface steel, microstructure phases analyzed using scanning electron microscopy, energy dispersive spectroscopy, X-ray diffraction, photoelectron spectroscopy. In addition, hardness substrate was tested with a microhardness tester, frictional...

A unique stir bar coated with dummy molecularly imprinted polymers for bisphenol was prepared by sol‐gel technique. The scanning electron microscopic image of the coating presented a homogeneous surface thickness about 57 ± 2.5 μm. Fourier transform infrared spectrum proved incorporating network. When used to extract from aqueous solution containing and its three analogs (4‐tert‐butylphenol, 4,4′‐dihydroxybiphenyl, 3,3′,5,5′‐tetrabromo‐bisphenol A). Dummy polymers‐coated showed better...

Abstract This paper aims to develop a chromium‐free chemical conversion coating with good corrosion resistance. A novel was prepared on 6061 aluminum alloy by dipping in the treatment solution containing titanium/zirconium based‐ions and sodium metaphosphate cerium nitrate hexahydrate as additives. The morphology composition of coatings were observed scanning electron microscopy energy dispersive X‐ray spectroscopy. microarea structure at different formation stages analyzed probe...

Carbon dioxide corrosion presents a significant challenge in the oil and gas field. This study simulates corrosive environment characteristics of fields to investigate inhibition properties three triphenylmethane dyes. The inhibitive performance mechanisms these dyes were analyzed through weight loss electrochemical testing, revealing that crystal violet (CV) exhibited superior effectiveness over malachite green (MG) Fuchsine basic (FB). At concentration 150 ppm CO2-saturated 5% NaCl...

Purpose This paper aims to focus the synchronous chemical conversion technology–based titanium/zirconium composite on 6061, 7075 aluminum alloys and galvanized steel. Design/methodology/approach The effects of pH, temperature, reaction time other process parameters corrosion resistance three metal surface coatings were investigated by copper sulfate drop electrochemical performance tests under a certain content H2TiF6 H2ZrF6. morphology element distribution coating analyzed scanning electron...

This paper aimed to develop synchronous chemical conversion coating on multi-metal substrates with good corrosion resistance meet the primer process of new energy light vehicle bodies. Titanium/zirconium-based coatings were prepared 6061 aluminum alloy/7075 alloy/galvanized steel substrates. By measuring open circuit potential (OCP), formation a muti-metal can be roughly divided into three steps. Potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS) techniques...

Purpose The purpose of this paper is to synthesize amines/phenolic antioxidants by a new method and characterize the influence on thermo-oxidative degradation in trimethylolpropane trioleate (TMPTO) base oil. Design/methodology/approach molecule structures lubricants were confirmed using Fourier transform infrared spectroscopy (FTIR). oxidative stability was evaluated pressurized differential scanning calorimetry (PDSC). Findings These findings suggested that butyl-octyl-diphenylamine has...

Abstract To improve the corrosion resistance of LY12 aluminum alloy, a novel Mo–Zr–Ti composite conversion coating on its surface was prepared. The morphology, elements distribution, phase compositions and were systematically determined, relation between them established. results indicate that optimal temperature time are 40 °C 15 min, respectively. morphology under best condition is continuous dense. major Mo, Zr, Ti, Al, O F, their distribution inner outer distinction. mainly consist MoO 3...

Exposing engineering plastics to UV irradiation can easily destroy the original molecular structure of materials and consequently affect their tribological properties. This study investigated effects on typical plastics, such as polytetrafluoroethylene (PTFE) polyether ether ketone (PEEK), properties under heavy loads (20 MPa). The surface morphology results showed that appearance PEEK changed significantly irradiation. However, change in PTFE was negligible. Under micromorphology,...

Purpose This study aims to expand the reliability and special functions of lightweight materials for high-end equipment green manufacturing, so that it is first such research carry out nano-composite technology nickel-coated carbon nanotubes (Ni-CNTs)-based titanium-zirconium chemical conversion on aluminum alloy substrate. Design/methodology/approach Corrosion behavior various coatings was investigated using dropping corrosion test, linear polarization electrochemical impedance...

Purpose The purpose of this paper is to develop a chrome-free and phosphorus-free chemical conversion coating with good corrosion resistance, novel was prepared by adding cerium nitrate hexahydrate salicylic acid in the treatment solution containing titanium/zirconium ions on 6061 aluminum alloy. Design/methodology/approach Compared AA6061 alloy matrix, self-corrosion potential significantly positively shifted, current density greatly reduced its resistance improved. Morphology composition...

So as to solve the chemical conversion challenge of various metals in a cell at same time, process technology with complex formula fluoroziconate/ fluotitanate and some addictives used on aluminum alloy/steel other metallic materials was studied. Investigated influence zirconium fluoride acid salt, film forming additive, technological parameters such pH, temperature, time coating color, golden yellow blue color were produced alloy steel respectively. Tafel polarization curve showed that bare...

We present herein a highly efficient atroposelective synthesis of five/five-membered

This paper aims to explore a new-type Mo-based composite conversion coating on 6061 aluminum alloy, systematically evaluate its corrosion resistance, and further reveal the formation mechanism. The effects of pH, time (CTI) H2ZrF6 content resistance were determined by dropping test electrochemical tests, average rate (ACR) in neutral 3.5 wt.% NaCl solution under different temperatures was calculated immersion test. micro-morphology phase compositions investigated SEM, EDS XPS. results showed...