Study of corrosion characteristics of motor oils used in gas-diesel engines of BelAZ mining dump trucks

Georgiy Dubov,Pavel Strelnikov,Sergey Nokhrin,Alexander Bogomolov,Elena Grigorieva,S Vöth,L Sobik,A Abay,Y Tan,M Cehlár,J Janocko,N Demirel,D Szurgacz

doi:10.1051/e3sconf/202131503010

Abstract

Comparative studies of the corrosion characteristics of motor oils used in internal combustion engines of BelAZ 75131 mining dump trucks using liquefied natural gas - methane - as a motor fuel are presented. It is noted that an increase in the lead concentration in waste oil of internal combustion engines of mining dump trucks can be influenced by the used motor oil when it is interacting with the crank mechanism bearings liners, which have lead in their composition. The research technique is presented. The data on the pH values of the studied neat motor oils and their oil-in-water emulsions are given. It is noted that the effect of moisture and atmospheric oxygen on various types of motor oils of the same manufacturer's brand affects the formation of either water-soluble organic acids that contribute to the corrosion attack on lead or its alloys, or the formation of water-soluble alkaline organic compounds that have a neutral effect on lead and its alloys. This fact suggests that motor oils used in internal combustion engines of mining dump trucks have various corrosion characteristics that eventually affect the content of harmful impurities in waste oils.

Highlights

Open pit mining has become a leader in the mining industry due to its high productivity, low cost and safety
Assuming that the source of lead accumulation in motor oil is babbitt of the upper layer of the bearing liners cooled by the VALVOLINE PREMIUM BLUE 9200 15W40 motor oil, which can presumably react to the babbitt composition, a study of the hydrogen parameters of samples of these oils was carried out
The studies conducted have shown that oils of the same brand, but different in type and used in CUMMINS KTA 50 diesel internal combustion engines of BelAZ 75131 mining dump trucks, have different corrosion characteristics

Summary

Introduction

Open pit mining has become a leader in the mining industry due to its high productivity, low cost and safety. It is this method that will be leading in the mining industry in the decade. Despite the advantages of open-pit mining, there are a number of disadvantages, one of which is a high downtime rate of mining dump trucks due to the failure of their units and assemblies. A decrease in the reliability of units and assemblies of mining dump trucks occurs due to wear of friction surfaces during operation, and due to the physical and chemical change in properties of oils, which in the process of operation accumulate metal impurities of products of wear and chemical interaction of the organic matrix of oils with materials of friction surfaces [2-5].

Methods

Results

Conclusion