scholarly journals ANALYSIS OF THE CHANGE IN ROUGHNESS ON A FACE-MILLED SURFACE MEASURED EVERY 45° DIRECTION TO THE FEED

2021 ◽  
pp. 29-36
Author(s):  
Antal Nagy ◽  
Janos Kundrak
Keyword(s):  
Carbon Steel ◽  
Relative Position ◽  
Steel Surface ◽  
Movement Direction ◽  
Machined Surface ◽  
Workpiece Surface ◽  
Characteristic Distribution ◽  
Carbon Steel Surface ◽  
Milled Surface ◽  
The Difference

In this article, we analyze the difference (inhomogeneity) of the roughness values measured on a nonalloy carbon steel surface milled with a parallelogram-shaped (κr = 90°) insert as a function of the the tool movement direction and the relative position of the examining points on the workpiece surface. The characteristic distribution of roughness and the magnitude of the deviations were examined by measuring at selected points along several planes on a surface characterized by the movement conditions of the workpiece and the symmetrically arranged tool perpendicular to the machined surface, which formed double milling marks. The selected points mark the lines with specified inclinations with respect to the feed direction, and their measured values were compared. In these directions, the magnitude of the difference in roughness measures was obtained.

scholarly journals Experimental Theoretical Studies on Extract of Date Palm Seed as a Green Anti-Corrosion Agent in Hydrochloric Acid Solution

Molecules ◽  
2021 ◽  
Vol 26 (12) ◽  
pp. 3535
Author(s):  
Naba Jasim Mohammed ◽  
Norinsan Kamil Othman ◽  
Mohamad Fariz Mohamad Taib ◽  
Mohd Hazrie Samat ◽  
Solhan Yahya
Keyword(s):  
Carbon Steel ◽  
Hydrochloric Acid ◽  
Active Sites ◽  
Immersion Time ◽  
Steel Surface ◽  
Date Palm ◽  
Inhibition Efficiency ◽  
Experimental Results ◽  
Plant Materials ◽  
Carbon Steel Surface

Extracts from plant materials have great potential as alternatives to inorganic corrosion inhibitors, which typically have harmful consequences. Experimental and theoretical methodologies studied the effectiveness of agricultural waste, namely, date palm seed extract as a green anti-corrosive agent in 0.5 M hydrochloric acid. Experimental results showed that immersion time and temperature are closely related to the effectivity of date palm seed as a corrosion inhibitor. The inhibition efficiency reduced from 95% to 91% at 1400 ppm when the immersion time was increased from 72 h to 168 h. The experimental results also indicated that the inhibition efficiency decreased as the temperature increased. The presence of a protective layer of organic matter was corroborated by scanning electron microscopy. The adsorption studies indicated that date palm seed obeyed Langmuir adsorption isotherm on the carbon steel surface, and Gibbs free energy values were in the range of −33.45 to −38.41 kJ·mol−1. These results suggested that the date palm seed molecules interacted with the carbon steel surface through mixture adsorption. Theoretical calculations using density functional theory showed that the capability to donate and accept electrons between the alloy surface and the date palm seed inhibitor molecules is critical for adsorption effectiveness. The HOMO and LUMO result indicated that the carboxyl (COOH) group and C=C bond were the most active sites for the electron donation-acceptance type of interaction and most auxiliary to the adsorption process over the Fe surface.

Relations of Low-Carbon Steel Surface Layer Hardness of Hard Facing and Welding Techniques

2010 ◽  
Vol 34-35 ◽  
pp. 1338-1342
Author(s):  
Zheng Guan Ni
Keyword(s):  
Wear Resistance ◽  
Carbon Steel ◽  
Steel Surface ◽  
Surface Hardness ◽  
Low Carbon Steel ◽  
Surface Electrode ◽  
Low Carbon ◽  
Wear Resistant ◽  
Cladding Layer ◽  
Carbon Steel Surface

through super-hard wear-resistant surface electrode surfacing D707 in Low-carbon steel. We have analysis the effect of welding process parameters and post-weld heat treatment process on low carbon steel surface hardness of cladding layer. The experimental results show that: after quenching hardness value no significant change; But after annealing the hardness value decreased and after annealing the crystal grain of the underlying tissues uniformization become tiny. micro-hardness testing is carried out in the weld cross-section, we have find out that from the base metal to the cladding layer the surface hardness values is getting higher and higher, while the indentation is getting smaller and smaller. Because hardness is a measure of wear resistance materials, thus it can indirectly show that when low-carbon steel surface electrode in the super-hard wear-resistant surfacing welding layer, it can improve the surface hardness of low carbon steel and improve wear resistance of low carbon steel surface.

scholarly journals Adsorption Behaviour of Film-forming Amine on Pre-oxidized Carbon Steel Surface

2021 ◽  
Author(s):  
Lin Genxian ◽  
Sun Yun ◽  
Liu Canshuai ◽  
Fang Jun ◽  
Song Lijun ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Steel Surface ◽  
Adsorption Behaviour ◽  
Carbon Steel Surface ◽  
Film Forming ◽  
Oxidized Carbon

Two-Section Model for Adsorption of Tinidazole on Carbon Steel Surface in 3%HCl Solution

2011 ◽  
Vol 311-313 ◽  
pp. 922-926
Author(s):  
Sheng Tao Zhang ◽  
Lin Liang Yin ◽  
Xiao Li
Keyword(s):  
Carbon Steel ◽  
Steel Surface ◽  
Bulk Solution ◽  
Adsorbed Molecules ◽  
Temkin Isotherm ◽  
Model Based ◽  
Carbon Steel Surface ◽  
Section Model ◽  
Hcl Solution

This paper has reported a two-section model based on Temkin isotherm for interpreting the adsorption and inhibition properties of tinidazole on 45# carbon steel surface. The results show that the repulsion behavior between the adsorbed molecules turns into interattraction as the concentration of inhibitor is over 400mg/L. And additionally, the withdrawal of adsorbed molecules back into the bulk solution becomes thermodynamically favorable due to the formation of hemi-micelles.

scholarly journals Synthesis of 1,2,3-Triazole Derivatives and Its Evaluation as Corrosion Inhibitors for Carbon Steel

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Gabriel O. Resende ◽  
Sara F. Teixeira ◽  
Igor F. Figueiredo ◽  
Alexandre A. Godoy ◽  
Dafne Júlia F. Lougon ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Heterocyclic Compounds ◽  
Steel Surface ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Chemical Interaction ◽  
Synthetic Route ◽  
Acid Media ◽  
Carbon Steel Surface ◽  
Physical And Chemical

Heterocyclic compounds containing the 1,2,3-triazole moiety can be synthesized through click-chemistry, which is rapid reactions with good yields allowing the synthesis of great derivatives diversity by making minor changes in the reagents. The products were obtained with good yields through a synthetic route which uses ready available nonexpensive commercial reagents and without any further purification of any product or intermediate. The carbon steel anticorrosive activity was tested through weight loss and electrochemical assays in acid media. It was observed relevant inhibition efficiency (> 90%) for inhibitors 1 and 2. From Langmuir isotherm, it was hypothesized the adsorption of inhibitors on the carbon steel surface might occur by physical and chemical interaction; however, the activation energy raised suggests a physisorption process for the interaction of the inhibitor on the carbon steel surface.

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