G. Bălan, Romanian-German University of Sibiu, M.D. Ungureanu, Spiru Haret University of Bucharest, G. Dobrotă, University Constantin Brâncuși of Târgu Jiu, România The objective of this paper is to highlight the current state of the steel industry at the global and regional level, in terms of its level of important indicators, such as: production capacity, production volume, level of consumpti...

Ni- and Co-oxide materials have promising electrocatalytic properties towards the oxygen evolution reaction (OER) reduction (ORR), attract with low cost, availability, environmental friendliness. The stability of these in alkaline media has made them most studied candidates for practical applications such as a gas diffusion electrode (GDE) rechargeable metal-air batteries. In this work, we prop...

This article extensively reviews published research on inclusions in ingot steel and defects on ingot products, methods to measure and detect inclusions in steel, the causes of exogenous inclusions, and the transport and entrapment of inclusions during fluid flow, segregation, and solidification of steel cast in ingot molds. Exogenous inclusions in ingots originate mainly from reoxidation of th...

In this paper, the semiconducting behavior of carbon steel in acid, base and salt solutions was studied by utilizing potential-capacitance and Mott-Schottky analysis. It was pointed out that the capacitance variation of space charge layer of carbon steel in different solution was different. The carbon steel showed p-type semiconducting behavior in 5% sulfuric acid and 5% sodium sulfate solution...

Under the circumstances of low-carbon economy, the theoretical applications of the green supply chain management of steel and iron manufacture are to reform and innovate the present manufacturing process, enhance the controlling and reclaiming, and recycling using of the waste steel and iron, steel slag, and dust emissions, establish the green supply chain structure oriented to the cycle of “re...

This study investigates effects of elevated rebar casting temperature on the interfacial porosity and Ca/Si ratio steel-concrete interface by scanning electron microscopy (SEM). Experimental variables including temperatures 25°C, 40°C, 55°C, 70°C, 85°C, water/cement ratios 0.30, 0.45, 0.60, diameters 10 20 mm are considered. Large capillary pores steel–concrete (SCI) were quantified backscatter...

This paper presents the results of a study on effect epoxypolyester based powder coatings critical strength plate specimens made rolled steel sheets. The show that model using planar elements gives more accurate than three-dimensional elements. best agreement with experiment was obtained Ansys Eigenvalue bucling, less 1%. lowest experimental in solid elements, about 70%.

This study was devoted to verifying the effect of using three different coating materials on draft requirement chisel plow shares. Four types shares with same geometric dimensions (70 mm width, 0.26 rad as lift angle and 45° for cutting angel) were used.  One share kept without its standard iron a control, other coated copper, aluminum stainless steel. Experiments conducted an open air soilbin ...

The welding process is a permanent connection for metal materials using heat energy. GTAW (Gas Tungsten Arc Welding) method carried out on AISI 1045 steel material with solid round shape, which has the characteristics and properties of slightly above low carbon steel. was based AWS A5.18 standard specifications, in this study. by varying amperage between 70, 90, 110 amperes as well ER70S-G seri...