2009 fascicula9 nr1
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Influence of Technological Parameters on the Evolution of Nickel Films Deposited by Electrolysis
(Universitatea "Dunărea de Jos"din Galați, 2009)The influence of technological parameters on the structure of nickel layers electrodeposited on a copper substrate in a Watts bath has been studied. The complex influence of current densities, temperature and pH values ... -
Rapid Synthesisof ZnO Micro and Nanostructures
(Universitatea "Dunărea de Jos" din Galați, 2009)This paper focuses on the newer chemical synthesis of zinc oxide powders and the effects of reaction temperature and possible mechanism of ZnO formation. The study of the reaction mechanism at different temperatures has ... -
Preliminary Investigations Concerning Monitoring of Water Pollution Level
(Universitatea "Dunărea de Jos" din Galați, 2009)The aim of this paper is to develop an effective tool based on artificial intelligence techniques for monitoring and characterization of surface waters. Monitoring of the pollution in the aquatic environment consists in ... -
Severe Plastic Deformed Pure Aluminum by Equal Channel Angular Pressing
(Universitatea "Dunărea de Jos" din Galați, 2009)Samples of an aluminum alloy were subjected to an equal channel angular pressing (ECAP) at room temperature for one pass. For the several specimens severe plastic deformation process was interrupted to observe the material ... -
Study on the Influence of the Chemical Composition in the Thermomechanical Processing of the Steel
(Univesitatea "Dunărea de Jos" din Galați, 2009)This paper presents the results of industrial scale researches on the influence of the chemical composition on the characteristics of high yield point plates of wieldable fine grain steels. The comparative study of the ... -
Superior Valorisation of the Aluminium Scraps for Obtaining Complex Aluminium Master Alloys Used in Advanced Refining of the Steels
(Universitatea "Dunărea de Jos" din Galați, 2009)The research about aluminium scraps valorisation to obtain master alloys with reactive elements (Al, Mn, Si) used for special steels refining is presented in this paper. By this way the recycling of aluminium scraps leads ... -
Corrosion of Bronze Art Objects and Methods of Restoration
(Universitatea "Dunărea de Jos" din Galați, 2009)The paper presents a study of the corrosive state of sculptures and art objects made from copper and bronze, the equipment used to detect and study defects and the methods and solutions for restoring the art object ... -
Making Cast Piece Using Exothermic Head
(Universitatea "Dunărea de Jos' din Galați, 2009)In this paper presents a study about cost of part obtained with exothermal heads by replacement of classic heads. This method contributes to conduct solidification of cost pieces, because exothermal heads are forecast ... -
Characterization of Iron and Low Alloy Steel Powders Obtain by Water Atomization
(Univerversitatea "Dunărea de Jos" din Galați, 2009)Three types of iron and low ally steel powders were investigated to determinate their physical properties and surface morphology by SEM analysis. The powders were obtained by water atomization. The first type of powder ... -
Behavior of A537 Steel Grade in Carburizing in Fluidized Bed with Endothermic Atmosphere
(Universitatea "Dunărea de Jos" din Galați, 2009)Fluidized bed allows one to easily change from the chemical composition of the working atmosphere. The paper is based on experiments of carburizing in fluidized bed with endothermic atmosphere made from gases resulting ... -
Quality Engineering Procedures Applied to Determine the Weight of Influence of Factors on Microtrigeneration Systems (mCCHP)
(Universitatea "Dunărea de Jos" din Galați, 2009)Microtrigeneration systems are characterized by simultaneous generation of power, heat and cold for small applications (<50kW) and are designed for reducing GHG and other emission degreases. The cooling generation by ... -
A Typical Surface Formations Found on the Corrosion Layer of Iron Artefacts
(Universitatea "Dunărea de Jos" din Galați, 2009)The paper presents the experimental results obtained by applying non-invasive methods (OM, SEM-EDX, XRF) on two iron artefacts from the IInd and the IIIrd centuries A.D. (discovered in the incineration graves from ... -
Analytical Methods Helping the Archaeologists: Archaeometry
(Universitatea "Dunărea de Jos" din Galați, 2009)Very important objects of cultural heritage are material objects and objects of art produced by all communities. The physical and mechanical properties of material culture are always of prime concern to archaeometry and ... -
Electrochemical Deposition and SEM Surface morphology of Co and UHMWPE/Co Composite Layers
(Universitatea "Dunărea de Jos" din Galați, 2009)The work aims at obtaining composite coatings in cobalt matrix with dispersed phase UHMWPE (ultra high molecular weight polyethylene) and at characterizing the surface morphology analyse by SEM, the thickness of the ... -
Cladding by Welding with Hard Alloys
(Universitatea "Dunărea de Jos" din Galați, 2009)The paper presents the results of a research on the role of cladding by welding support of continuous casting plant. Emphasizing that plating leads to outer layer the study presents a complex of properties favorable for ... -
Experimental Researches Concerning the Influence of the Oxynitrocarburizing Thermochemical Treatment Over the Structure and Corrosion Resistance of C40 Steel
(Universitatea "Dunărea de Jos" din Galați, 2009)The aim of the paper is to present the results of the experimental researches regarding the corrosion behaviour of C40 steel, thermochemical treated by oxidant nitrocarburizing at 570°C. The thermochemical treatment was ... -
Studies Regarding Nickel Electrodeposition from Watts bath with Addition of Polyvinylpyrrolidone and Sodium Saccharine
(Universitatea "Dunarea de Jos" din Galați, 2009)This paper is based on some studies about the influence of polyvinylpyrrolidone (PVP) and sodium saccharine as far as concern their influence on the nickel electroplating processes from Watts bath. PVP is a wetting ... -
Utilisation of Electrochemical Methods for Characterization of Some Corrosion Inhibitors for Steel and Copper
(Universitatea "Dunărea de Jos" din Galați, 2009)The effect of chromate and molybdate on the corrosion inhibition of copper and steel has been investigated in two eutectics solution at room temperature. We used stationary electrochemical methods and optical microscopy ... -
Study Regarding Gravimetrical Corrosion of the Superficial Layers Obtained Through Electrical Discharge
(Universitatea "Dunărea de Jos" din Galați, 2009)The experimental research was made on superficial layers laid-down through electrical sparking on the steel carbon OLC 45 probes, the used electrode being made from a corrosion resistant material (Copper). The probes ... -
Analysis of Titanium Inteface and Tungsten Exterior layer Thickness Coated by Vibrator Electrode Method
(Universitatea "Dunărea de Jos" din Galați, 2009)The goal of this paper is to create metallic materials with superior functional performances. The layer obtained by electrode vibrator method must have a very good adherence on part surface and a high chemical and thermal ...
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