The present contribution is devoted to the production of the Ni-Bi-Se thin films widely used in the field of electronics, electrotechnology, and computer technology. During the process, at first, the Bi-Se compound has been formed on the nickel electrode by electrochemical method, and then by thermal treatment of this compound at 673K, ternary compound Ni3Bi2Se2 has been obtained. The results show that as the concentration of bismuth is increasing, its amount in deposited films increases regularly. The formation of the Ni3Bi2Se2 compound was also confirmed by XRD results. The photochemical properties of the obtained compounds were investigated in the dark and light, constant current of 100 nA for 0-600 seconds. With the illumination of the dark samples, the potential shifts from a positive side to a negative side, this decrease indicates that obtained thin films are not only photosensitive, also have n-type conductivity.

Nanowire is a cylindrical nano-structure with nanometer dimensions. In this research, the studied nanowire was made from the magnetic triple Ni-Fe-Co alloy. We utilized ordered porous anodic aluminum oxide as a template for the nanowire deposition. The nanowire arrays were electrodeposited in the cylindrical pores of the oxide layer by AC potential in a simple sulfate bath. Then the relation of shape and composition of the nanowires with their fabrication parameters was investigated. The results showed that the barrier layer modification had an essential role in the deposition process and a composition gradient was detected in a single nanowire.

In this study, Ni-Mo nanocrystalline alloys were prepared on steel substrates by ELECTRODEPOSITION method from citrate-ammonia bath by applying current densities 30, 60 and 100 mA/cm2. Results indicated that the obtained coatings were uniform and compact. Moreover, molybdenum content in the alloy and current efficiency decreased with increasing ELECTRODEPOSITION current density. X-ray diffraction analyses indicated that all coatings were composed of face-centered cubic solid solution of molybdenum in nickel with grain size of 9-5 nanometer. Moreover, the most intensive plane in X-ray diffragtogram was (111). On the othe hand, roughness measurements indicated that surface roughness escalated with increasing current density. Corrosion behavior study showed decrease in corrosion current density of substrate with applying Ni-Mo alloy coatings. In addition, corrosion current density reduced with increasing molybdenum content of the coating and the minimum amount was related to the coating with 13 atomic percent molybdenum.

Rhodium element is a noble and expensive metal used in many decorative and sometimes engineering works. In this article, the important aspects of rhodium element electroplating have been discussed. The various baths used in the rhodium electroplating process have been described. Also, the effect of some parameters such as current density, temperature, pH value and effect of plating time on the deposition rate and the quality of created coating has been investigated and compared. These studies show that the optimal bath for rhodium element electroplating is the sulfate; which is obtained on the copper substrate at a current density of 8.55 mA/cm2, temperature of 60 ℃, pH=2 and plating time  of 20 min.

In this paper, nanocrystalline nickel was electrodeposited using direct current and rotating electrodes. A Watt's bath containing saccharin as a grain refiner was used. The microhardness of deposits was studied and maximum hardness was found to be 620 HV. X-ray diffraction (XRD) tests were carried out to study grain size and texture. The texture of the deposits were changed from [220], [200], and [111] for microcrystalline nickel to [111] and [200] double fiber texture in nanocrystalline nickel. The minimum grain size of the deposit was 14 nm. Morphological studies by Scanning Electron Microscopy (SEM) exhibited a smooth morphology for nanocrystalline nickel, while it was rough for microcrystalline nickel. In addition, the effects of saccharin concentration, cathode rotation speed, and current density on microhardness, grain size, and morphology 0f deposits were studied.

To find a suitable treatment in the preparation of Nb surface for platinum ELECTRODEPOSITION, different methods such as thermal oxidation, anodic oxidation, mechanical roughening, and mechanical roughening with subsequent anodic etching were examined. X-ray photoelectron spectroscopy was used to study the chemical composition of depth analysis of the surface. Moreover, in order to examine the morphology and surface roughness, the samples were analyzed by Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM). The results showed that the most appropriate method for niobium surface preparation is mechanical roughening by shot blasting or abrading with emery and then anodic etching at the current density of 200A/m2 for 40 min. in a solution containing 95% methanol, 2.5% hydrofluoric acid, and 2.5% hydrochloric acid at the temperature of 35oC.

Watt’s bath and pulse reverse (PR) ELECTRODEPOSITION is used to produce spherical nickel-multiwall carbon nanotubes (Ni-MWCNT) of 2.00, 0.93, 1.63 and 6.71 mm diameter and a variety of size distributions. For 60 cycles, an absolute electrode position current of 18 A/dm2 is applied atcurrent ratios of ii = idissolution/ideposition = 0, 0.077, 0.200 and 0.368. A simple exponential equation is fitted to each pulse response by a resistance-capacitance (RC) simple model giving different time constants usable for diagnosing the effect of different parameters. Results show that PR electrode position is capable of producing microspherical Ni-MWCNT composite skeins of different diameters and size distributions. This could be identified with the time constant of the process.

Understanding the changes in effective parameters in this processes and interaction of these parameters are important for increasing efficiency and quality of cathodic electrode position paint. The effect of operating parameters of cathodic electrode position paint on superior mechanical coating was evaluated in this research. The plates were prepared using 85 different states of voltage and temperatures. The following tests were used for evaluating superior mechanical of coating: adhesive, thickness, flexibility and corrosion resistant. All tests were carried out according to ASTM standard. The results showed that 35oC is a critical temperature for cathodic electrode position paint and a temperature higher than 35oC caused a reduction in coating properties, especially reducing corrosion resistant. Using voltage above the rupture voltage effected all of the coating properties and film properties were reduced severely. The results showed that the best temperature and voltage for 150-second reaction were ranged from 30 to 32 oC and 240 to 260 voltages respectively