A novel cationic benzotriazole pigment (CBP) based on the benzotriazolium cation (BTAH2+) exchanged into a sulfonated organic resin has been synthesized and evaluated as a means of inhibiting the corrosion-driven cathodic disbondment of organic coatings from the surface of galvanized steel. The ...

A modified metal organic framework have been prepared by the solvothermal process of 2-(4-carboxyphenyl)-1, 3-dioxoisoindoline-5-carboxylic acid with Zn(OAc)2.2H2O. The framework has a PtS − type net. The obtained porous material has been characterized by X-ray diffraction, Scanning electron mic...

Layered materials of zinc hydroxychloride (ZHC), zinc hydroxynitrate (ZHN) and zinc hydroxysulfate (ZHS) were prepared by the precipitation method. The products were highly crystalline. The pH buffering capacities of the products are high in the pH range from 3 to 10. The zinc hydroxyl salts hav...

For certain applications of galvanized steel protected with conversion coatings it is important that the surface is electrically conductive. This is especially important with mating surfaces for electromagnetic compatibility. This paper addresses electrical conductivity of chromate conversion co...

A zinc chromate with the formula (NH4OH)3/2(ZnCrO4)2 was synthesized by hydrothermal reaction at 100°C in 24 h. The structure was solved from powder data and refined with GSAS. The yellow solid crystallizes in the hexagonal space group R−3m with a=5.99634(7) Å and c=21.5117(3) Å. Two types of a...

Zinc coatings immersed in a chromating solution acquire a mixed potential characteristic of zinc dissolution and the deposition of a chromium hydroxide layer. Zinc deposits are initially in a compressive stress but a zinc-chromate coating has a tensile stress which increases with chromate thickn...

The anticorrosive performance of two inhibitive pigments, zinc chromate and zinc phosphate, was compared using electrochemical impedance spectroscopy (EIS) and the scanning vibrating electrode technique (SVET) in pigment extracts in 0.1 M NaCl. It was observed that zinc was protected from corros...

This research is based on studying corrosion inhibitive effect of two anticorrosive pigments, zinc phosphate and zinc chromate. AC or electrochemical impedance spectroscopy (EIS) and linear sweep voltammetry (polarization) have been examined. At the first step, the pigments effects on electroche...

Hexavalent chromium Cr(VI) is a respiratory toxicant and carcinogen, with solubility playing an important role in its carcinogenic potential. Zinc chromate, a water insoluble or ‘particulate’ Cr(VI) compound, has been shown to be carcinogenic in epidemiology studies and to induce tumors in exp...

In various geological settings, alunite supergroup minerals, including the end members alunite [KAl3(SO4)2(OH)6] and jarosite [KFe3(SO4)2(OH)6], occur in extensive solid solution on the cation and anion sites, enabling them to accommodate a variety of elements. Jarosite is known for scavenging h...

Iron-impregnated granular activated carbon (Fe-GAC) has been shown effective for selenite adsorptive removal from aqueous solutions, but similar effectiveness was not observed with selenate. This study examined the effects of background electrolytes and pH on selenate adsorption on to Fe-GAC, an...

Optical absorption spectrum of chromium doped rubidium aluminium sulphate dodecahydrate single crystal is investigated. The electronic spectrum in the UV-VIS region is characteristic of Cr 3+ in trigonal symmetry and vibrational spectrum in the i.r. region is ascribed to the SO 42− and H 2O grou...

In present study Al coating was deposited by arc thermal spraying process thereafter treated with different concentration of Ammonium phosphate mono basic (NH4H2PO4) and 0.1 M calcium nitrate [Ca(NO3)2] to fill the porosity. Impedance values of treated coating was increased at longer duration of...

The article is considering the results of development of refractory cellular concrete based on aluminum-phosphate binder. It was prepared from aluminum production slag, aluminum recycling slag and aluminum etching sludges. The selection of aluminum phosphate is based on the fact that the aluminu...

Fourier-transform infrared (FT-IR) spectroscopic experiments were carried out during phosphate adsorption on highly crystalline gibbsite, poorly crystalline 2-line-ferrihydrite and amorphous iron–aluminum–hydroxide mixtures in the molar ratio 1:0, 10:1, 5:1, 1:1, 1:5, 1:10 and 0:1. The OH stre...

In this work, the removal of orthophosphate from synthetic wastewaters is studied by the electrocoagulation (EC) process using respectively aluminum and iron electrodes connected in monopolar configuration. The effects of current intensity, initial phosphate concentration, initial solution pH, t...

Electrochemical treatment is a new method for accelerating the phosphating processes at low temperatures that can be performed as cathodic and anodic treatments. In this study, aluminum phosphate coating was deposited on graphite by cathodic electrochemical treatment, and, then heat treatment wa...

In this study, carbon nanotube (CNT) and reduced graphene oxide (rGO) were studied for their potentials as novel adsorbents for trace concentrations of phosphorus and aluminum in water and wastewater. Static adsorption results demonstrated that CNT and rGO employed in this study removed up to 65...

The study deals with the possibilities of inhibition of the reaction of aluminium-phosphate binders with iron scale, which is contained in bauxite. This material is mixed with phosphate binders to form refractories. The hydrogen is produced by this reaction causing the mixture foaming. The amoun...

In order to analyze the inhibition effect of the additive on the thermal decomposition characteristics of ammonium nitrate (AN), thermal stability and thermal decomposition behavior of AN and its mixtures with various concentrations of ammonium dihydrogen phosphate (ADP) are systematically inves...