CHAPTER the lubricity property of vegetable oils is

CHAPTER
1

INTRODUCTION

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      In the last two
decades , the use of biodegradable products has been risen as these products
has many potential benefits of greenhouse balance. Also the oils extracted from
some vegetables and mineral products has been used for the purpose of
lubrication. After the petroleum and cheaper oils came into existence,
alternatives went unnoticed. Again the attention fell on vegetable oils during
the time of war and when there is a lack of oil. During World War
I and World War II, vegetable oils has been used as an alternative for fuel,
lubricants, greases and energy transfer swiftly. The interest of using
vegetable oil as a lubricant has increased globally over the last two years. Vegetable
oils can and have been used as lubricants in their natural forms. The process
flow cycle of  vegetable oil as lubricant
is shown in Figure1.1. They have various merits and demerits when it comes to
industrial and machinery lubrication. On an positive note, the lubricity
property of vegetable oils is far remarkable and admirable when compared to
mineral oils. Lubricity is very potential 
in few applications like tractor transmissions, friction materials for
reducing clutch slippage.

      The very frequently used
vegetable oils are rapeseed (canola oil), soybean, corn, sunflower, safflower,
peanut, etc. When two metals collide with each other in
mobility then there will be wear on the metal surfaces and more heat will be
produced. Friction
is the resistive force acting on the relative motion of solid surfaces, fluid
layers, and material elements sliding against each other. Wear is
related to interactions between surfaces and specifically the removal and
deformation of material on a surface as a result of mechanical action of the
opposite surface. So lubricants are used in those places to
reduce the amount of wear and heat produced. Many different metals are used but
here steel is used as the metal surface. The instrument used to find the wear
and CoF (Coefficient of Friction) is Pin on Disk.

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