The effect of gas environment on rolling oil removal from cold-rolled steel as studied by TG

Abstract

This study investigates mechanisms of cold rolling oil removal from the surface of low-carbon steel. The removal process has been probed using thermogravimetric analysis techniques. A range of furnace atmospheres, from non-oxidising through to highly oxidising, have been used to simulate the oil removal conditions in the industrial process. The activation energies of oil removal under each gas atmosphere have been determined by MTG and the Flynn-Wall-Ozawa method. The results show that a reducing atmosphere is the optimal environment for effective oil removal. Steel-oil surface interactions have also been investigated to show that the steel substrate catalyses oil removal.

Advanced Silicon Chemistry in Australia: Forming Strong Links with Asia

“…The cyclic siloxaneproducts were characterized by single-crystal X-ray diffraction, 1 H, 13 Ca nd 29 Si NMR spectroscopy,t hermogravimetric analysis and differential scanning calorimetry,t his being expertiser esidenti nt he research teams managed by Matisons and Clarke.] [31][32][33][34][35][36] 1,5-Di-(ethylphenyl)-1,5-dimethyl-3,3,7,7-tetraphenylcyclotetrasiloxane, alternating cyclic siloxane monomer,w as also synthesised by this novel synthetic route. [37] The reactions cheme to prepare the crystalline alternating cyclic siloxane monomer is shown in Scheme6,b elow: Figure 6a nd Figure 7s how 29 Si NMR and single-crystal XRD image of 1,1,5,5-tetramethyl-3,3,7,7-tetraphenylcyclotetrasiloxane.…”

“…Scheme shows the preparation of a medium viscosity, high molecular weight, dimethylsiloxy–diphenylsiloxy alternating co‐polymer, obtaining a 75 % yield . Advanced modulated DSC (differential scanning) and other thermal analysis techniques, used by the Matisons and Clarke teams were used to show this polymeric oil had a mid‐point glass transition ( T g ) of −21.5 °C. GPC (gel permeation chromatography) was used to show this oily alternating siloxane copolymer, uniquely had a number average molecular weight ( ) of 61,763 and a weight average molecular weight ( ) of 81,817 and a polydispersity (PD) of 1.42.…”

Kinetic studies on thermal degradation of automotive lubricant oils and estimation soot content by TGA

“…Sooting is believed to be a major cause of engine wear, and soot if left unchecked will become a residue that will clog the internal parts of diesel and gasoline engines. Therefore it is vital to perform regular oil analysis to ensure good oil quality and low soot content.To evaluate lubricant oils the thermo gravimetric analysis (TGA and DTG) is considered to be a more accurate technique for soot content determination and study the thermal degradation kinetics has been widely accepted among researchers leading to meaningful economy (1)(2)(3)(4)(5)(6)(7)(8)(9)(10). At temperatures greatly exceeding the thermal stability point of the lubricant, larger molecules will break apart into smaller molecules.…”