MONITORING OF THE CHEMICAL COMPOSITION OF SEMI-SYNTHETIC MOTOR OIL DURING OPERATION BY THE METHOD IR SPECTROSCOPY

Author(s):  
Y.V. Dyomochkina ◽  
◽  
V.S. Loginov ◽  
M.V. Lyzlova ◽  
G.I. Melnik ◽  
...  
2021 ◽  
Vol 15 (3) ◽  
pp. 432-437
Author(s):  
Taras Chervinskyy ◽  
◽  
Oleg Grynyshyn ◽  
Roman Prokop ◽  
Pavlo Shapoval ◽  
...  

The changes in operational and physico-chemical properties of original and used semi-synthetic motor oil Castrol 10W-40 before and after its use in a diesel engine have been investigated. Derivatographic studies were carried out to examine a thermal stability; IR spectroscopy was used to confirm the presence of oil aging products. The composition of the inorganic part of the studied semi-synthetic oils was established by X-ray fluorescence analysis.


1993 ◽  
Vol 63 (1-4) ◽  
pp. 240-244 ◽  
Author(s):  
W. Theiss ◽  
P. Grosse ◽  
H. Münder ◽  
H. Lüth ◽  
R. Herino ◽  
...  

1989 ◽  
Vol 25 (3) ◽  
pp. 172-173
Author(s):  
V. D. Reznikov ◽  
V. P. Paron'kin ◽  
F. N. Merzlikin ◽  
A. G. Pavlov
Keyword(s):  

1990 ◽  
Vol 185 ◽  
Author(s):  
Dieter R. Fuchs ◽  
Hannelore RÖmich ◽  
Helmut Schmidt

AbstractGlass sensors, based on K-Ca-silicate glass chips, with a low durability against corrosive stresses, offer a new method for assessing the complex environmental stress situation of monuments and pieces of art. The easy-tohandle technique is able to detect the combined impact of climatic stresses, pollution and microbiological effects as well as synergetic interactions.The chemical composition of the sensitive glasses enables judgements within few months. This way long-term estimates can be obtained without costly long-term investigations.The corrosion progress is determined by microscopy and IR-spectroscopy of the weathered glass sensor surfaces. The sensors are already operating in the field of stained glass window preservation. They monitor the efficiency of different kinds of external protective glazings and the remaining stresses from the in-door environment of cathedrals.


Author(s):  
А.А. СИМДЯНКИН ◽  
И.А. УСПЕНСКИЙ ◽  
М.Н. СЛЮСАРЕВ

Проблема и цель. Целью настоящего исследования является оценка влияния частоты ультразвука на смазочные свойства моторных масел и износ узлов трения двигателей при ультразвуковой обработке масел. Методология. Предметом исследований является ультразвуковая обработка моторных масел и вызываемые ею изменения износа узлов трения. Были проведены следующие эксперименты: оценка влияния частоты ультразвука на изменение коэффициента поверхностного натяжения моторных масел при их ультразвуковой обработке; оценка влияния частоты ультразвуковой обработки смазки на износ образцов пар трения при износных испытаниях образцов на машине трения 2070 СМТ 1М. Обработка моторного масла ультразвуком проводилась с помощью экспериментального устройства для генерации ультразвука переменной частоты. Обработке подвергались моторные масла: масло моторное «LukoilDIESELOIL» 10W-40 минеральное; масло моторное «SHELL Helix HX7 Diesel» 10W-40 полусинтетическое; масло моторное «ZIC X7 Diesel» 10W-40 синтетическое. Результаты. Были получены расчетно-экспериментальные зависимости коэффициента поверхностного натяжения от частоты ультразвукового сигнала для минерального, полусинтетического и синтетического моторных масел, а также зависимости фактора износа образцов пар трения от частоты ультразвука длясинтетического моторного масла.Определен диапазон частот ультразвука (17-44 кГц), при котором ультразвуковая обработка синтетического моторного масла дает наибольшее снижение износа пар трения Заключение. На основании проведенных исследований рекомендуется проводить обработку моторного масла ультразвуком в диапазоне частот от 17 до 44 кГц. Рекомендуется также продолжение работ по доработке устройства для генерации ультразвука оптимальной частоты и адаптации его в систему смазки реальных дизельных автотракторных двигателей. Problem and purpose. The purpose of this study was to assess the efect of ultrasound frequency on lubricating properties of engine oils and the wear of friction units of engines when ultrasonic treatment of oils. Methodology. The subject of the research was the ultrasonic treatment of engine oils and the changes in the wear of friction units caused by it. The following experiments were carried out: evaluation of the efect of the ultrasound frequency on the change in the surface tension coefcient of motor oils when their ultrasonic treatment; evaluation of the efect of the frequency of ultrasonic treatment of the lubricant on the wear of samples of friction pairs during wear tests of samples on a 2070 SMT 1M friction machine. Ultrasonic treatment of engine oil was carried out using an experimental device for generating ultrasound of variable frequency. The following engine oils were processed: motor oil "Lukoil DIESEL OIL" 10W-40 mineral; motor oil "SHELL Helix HX7 Diesel" 10W-40 semi-synthetic and motor oil "ZIC X7 Diesel" 10W-40 synthetic. Results. Authors got calculated and experimental dependences of the surface tension coefcient on the frequency of an ultrasonic signal for mineral, semi-synthetic and synthetic motor oils, as well as the dependence of the wear factor of samples of friction pairs on the frequency of ultrasound for synthetic engine oil. The frequency range of ultrasound (17-44 kHz) was determined, in which the ultrasonic treatment of synthetic motor oil gave the greatest reduction in the wear of friction pairs. Conclusion. Based on the studies carried out, it is recommended to treat engine oil with ultrasound in the frequency range from 17 to 44 kHz. It is also recommended to continue work on improving the device for generating ultrasound of the optimal frequency and adapting it to the lubrication system of real diesel automotive engines.


Author(s):  
W. Theiss ◽  
P. Grosse ◽  
H. Münder ◽  
H. Lüth ◽  
R. Herino ◽  
...  

2015 ◽  
Vol 1085 ◽  
pp. 3-6 ◽  
Author(s):  
Malika P. Mirzobekzoda ◽  
Elizaveta V. Maltseva ◽  
Natalya S. Shekhovtsova

Humic substances are the major components of soil, peat and brown coal. They can be fractionating into fulvic acids (FA), brown humic acids (BHA) and gray humic acids (GHA). In this work we investigated the influence of mechanochemical modifications on structural composition of HAs main fractions using the methods of IR and 1H MRS spectroscopy. The IR spectroscopy results has shown that HA has different chemical composition in comparison with GHA and BHA. Potentiometric titration showed that mechanoactivation (MA) with thiourea increases the amount of oxygen-containing groups up to 2.5. For the first time we studied the impact of modifying agent of thiourea on the structural composition and acid-base properties of HAs major fractions - GHA and BHA during the mechanoactivation process.


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