【摘 要】
：
8-hydroxyquinoline (8-HQ) intercalated layered double hydroxides (LDH) film as underlayer and sol–gel layer was combined for active corrosion protection of the AM60B magnesium alloy. The LDH, LDH/sol–gel, and LDH@HQ/sol–gel coatings were analyzed using th
【机 构】
：
Applied Chemistry Department,University of Mohaghegh Ardabili,Ardabil 5619911367,Iran
论文部分内容阅读
8-hydroxyquinoline (8-HQ) intercalated layered double hydroxides (LDH) film as underlayer and sol–gel layer was combined for active corrosion protection of the AM60B magnesium alloy. The LDH, LDH/sol–gel, and LDH@HQ/sol–gel coatings were analyzed using the scanning electron microscopy (SEM), field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), atomic force microscopy (AFM), and electrochemical impedance spectroscopy (EIS) methods. The SEM images showed that the surface was entirely coated by the LDH film composed of vertically-grown nanosheets. The same morphology was observed for the LDH/sol–gel and LDH@HQ/sol–gel coatings. Also, almost the same topography was observed for both composite coatings except that the LDH@HQ/sol–gel coating had relatively higher surface roughness. Although the LDH film had the same impedance behavior as the alloy sample in 3.5wt％ NaCl solution, its corrosion resistance was much higher, which could be due to its barrier properties as well as to the trap-ping of the chloride ions. Similar to the LDH film, the corrosion resistance of the LDH/sol–gel composite diminished with increasing the ex-posure time. However, its values were much higher than that of the LDH film, which was mainly related to the sealing of the solution path-ways. The LDH@HQ/sol–gel composite showed much better anti-corrosion properties than the LDH/sol–gel coating due to the adsorption of the 8-HQ on the damaged areas through the complexation.
其他文献
Combustion kinetics of the hydrochar was investigated using a multi-Gaussian-distributed activation energy model (DAEM) to ex-pand the knowledge on the combustion mechanisms. The results demonstrated that the kinetic parameters calculated by the multi-Gau
Porous materials have promise as sound insulation, heat barrier, vibration attenuation, and catalysts. Most industrial solid wastes, such as tailings, coal gangue, and fly ash are rich in silicon. Additionally, a high silicon content waste is a potential
Petroleum coke is industrial solid wastes and its disposal and storage has been a great challenge to the environment. In this study, petroleum coke was utilized as a novel co-reduction reductant of low-grade laterite ore and red mud. A ferronickel product
A new method is proposed for the recovery of Mn via the direct electrochemical reduction of LiMn2O4 from the waste of lithium-ion batteries in NaCl?CaCl2 melts at 750℃. The results show that the LiMn2O4 reduction process by the electrochemical method on t
To improve the separation capacity of uranium in aqueous solutions, 3R-MoS2 nanosheets were prepared with molten salt electro-lysis and further modified with polypyrrole (PPy) to synthesize a hybrid nanoadsorbent (PPy/3R-MoS2). The preparation conditions
The effect of extrusion temperature and ratio on the microstructure, hardness, compression, and corrosion behavior of Mg–5Zn–1.5Y alloy were analyzed in this study. The microstructural observations revealed that the cast alloy consists of α-Mg grains, and
Frequent offshore oil spill accidents, industrial oily sewage, and the indiscriminate disposal of urban oily sewage have caused seri-ous impacts on the human living environment and health. The traditional oil–water separation methods not only cause easily
Transition metal phosphides (TMPs) have exhibited decent performance in an oxygen evolution reaction (OER), which is a kinetic bottleneck in many energy storages and conversion systems. Most reported catalysts are composed of three or fewer metallic compo
ZrC and ZrB2 are both typical ultra-high temperature ceramics, which can be used in the hyperthermal environment. In this study, a method for preparing ultrafine ZrC–ZrB2 composite powder was provided, by using the raw materials of nano ZrO2, carbon black
Hexavalent chromium (Cr(VI)) compound is useful to various industries but is toxic and carcinogenic. In this research work, we fab-ricate an amperometric sensor for the determination of Cr(VI), using a titanium dioxide (TiO2)-reduced graphene oxide (rGO)