http://arthra.ugal.ro/handle/20.500.14043/26015 2026-04-18T11:51:19Z http://arthra.ugal.ro/handle/20.500.14043/26029 Electrodeposition and Characterization of Ni-Si Nanocomposite Coatings Istrate, Gina Genoveva In this paper is presented morphological aspects and corrosion behaviour of composite coatings having nickel as metal matrix and silicon as dispersed phase obtained during electrodeposition process of nickel. Silicon mean diameter size of particles particles by 50 nm. The Ni-Si composite coatings were electrodeposited from a suspension silicon particles in aqueous nickel sulphate electrolyte by adding 10g/L and 20g/L of silicon particles in the electrolyte solution. The morphological aspects of the coatings and inclusion on particles were investigated using SEM and EDX. As test solution NH4OH 0.5M (specific coke industry) was used in a three electrode open cell with nickel based nanostructured composite coatings as working electrode (WE), a platinum electrode as counter electrode (CE) and an Ag/AgCl electrode as reference electrode (RE). The Annals of "Dunarea de Jos" University of Galati Fascicle IX Metallurgy and Materials Science N0. 4 – 2013, ISSN 1453 – 083X 2013-01-01T00:00:00Z http://arthra.ugal.ro/handle/20.500.14043/26028 Evaluation of the Occupational Risk Associated to Work Environment in Ferrous Metallurgy Radu, Tamara; Ciocan, Anișoara Work environment present risk factors due to chemical pollution of ambient air with dust, smoke, fumes, vapors, mists and gases. Moreover physical risk factors (related to noise, lighting, temperature, vibration, humidity, radiation) lead to hazards with varying degrees of significance. In this paper were identified the hazards associated with the work place for a maintenance worker who works in all sectors of metallurgical plant. The risk assessment was made in terms of severity and probability, combining these two factors in a risk matrix. From the analysis the significant hazards (unacceptable) related to work environment resulted. These are caused by the presence of the following pollutants: toxic gases (VOCs, PAHs, dioxins, furans), explosive flammable gases (methane gas, blast furnace gas, bigaz, oxygen), carbon monoxide and particulate matter. The Annals of "Dunarea de Jos" University of Galati Fascicle IX Metallurgy and Materials Science N0. 4 – 2013, ISSN 1453 – 083X 2013-01-01T00:00:00Z http://arthra.ugal.ro/handle/20.500.14043/26027 Radial Forging Machine. Technology for Axle Type Parts Hanganu, Doru; Neacșu, Marian This paper presents three types of radial forging machines to produce the axle type pieces. The new types of radial forging machines are presented cinematically. The movement of the deformation tools at these types of machines is compared with the motion at the existing machines. The Annals of "Dunarea de Jos" University of Galati Fascicle IX Metallurgy and Materials Science N0. 4 – 2013, ISSN 1453 – 083X 2013-01-01T00:00:00Z http://arthra.ugal.ro/handle/20.500.14043/26026 Effect of Oxidation on Spectrophotometric and Rheological Parameters of Corn Oil Șolea, Liviu; Crețu, Romică The aim of this study is the viscosity’s evolution depending on the temperature and the shear rate and the analysis of the transmittance spectra of the oxidized corn oil. Corn oil was oxidized of the temperatures of 100°C, 110°C, 120°C, the periods of time of oxidation being 5 to 10 hours. An increase of the viscosity depending on the increase of oxidation temperature and oxidation time is to be noticed. Increasing of the oxidation temperature and the period of oxidation is the cause of the progressing color difference of the oxidized oils comparing to non-oxidized corn oil. The Annals of "Dunarea de Jos" University of Galati Fascicle IX Metallurgy and Materials Science N0. 4 – 2013, ISSN 1453 – 083X 2013-01-01T00:00:00Z