Anodically deposited Mn-Mo-o electrodes by direct and pulse current as novel anode materials for hydrogen production during seawater electrolysis

Hydrogen is currently well recognized as a future fuel. Its production from seawater electrolysis using electroactive anode is presented in this study. Mn-Mo-O which is known for its efficiency as well as environmentally benign nature is used in this work. Direct and pulse electro-deposition methods were applied for preparation of the Mn-Mo-O electrode. Variation of both direct and pulse current. using sulfuric MnSO4-Na2MoO4 electrolyte solutions were the basis of the experiments. The electrodes were characterized by X-Ray Diffraction [XRD], Scanning Electron Microscopy [SEM] and electrochemical measurements. The performance of the electrodes were evaluated in 0.5M NaC1 electrolyte solution by electrolysis at 1000 Am[-2]. The findings indicated that pulse electrodeposition provide anode materials with better activity and durability as compared to direct electrodeposition method. The results are discussed in terms of structure, composition and mechanical properties of the anodes

Electropolishing of copper by using different mono, di and poly hydroxyl compounds additives

Electropolishing [EP] technique is one of more efficient methods for cleaning and brightening of metals and alloys. Tarnishing and roughness covering copper surface can be removed by EP treatment imparting a bright and smooth surface at a suitable applied voltage, time and concentration. It was carried out by using an electrolytic cell containing phosphoric acid as the electrolytic solution, copper working electrode and lead counter electrode. Some additives such as soluble starch. ethylene glycol and methanol were added to reduce defects formed on the copper surface during EP operation. The effect of electric potential and time was studied and the surface was also investigated after EP treatment by SEM, EDX and AFM analysis

Corrosion inhibitor formulations from coal - tar distillation products for acid cleaning of steel in HCI

The chemical cleaning of boilers, heat exchangers, vessels, reactors, piping and other equipments from deposits and scales is usually conducted in acid solutions. Effective corrosion inhibitors are added to avoid the acid attack on metallic surface. The employed inhibitors in this field are based mainly on organic molecules containing nitrogen, sulfur and/or phosphorus. In this paper, inhibitor formulations prepared from coal-tar distillation products namely Anthracene Oil [AO] were evaluated for application in acid cleaning processes using weight loss and polarization measurements. These industrial byproducts contain large number of the above needed molecules. Some of the prepared formulations could offer high inhibition action [about 98%]. The effect of immersion time and temperature revealed quite stability of the inhibitors. Polarization data indicate general adsorption of the additives, affecting both the anodic and cathodic reactions of the metal corrosion