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E-mail：hnmdw@mandiwi.com
WhatsApp： 86 189 4252 5262
Analysis of Lubricant Coking Causes in Air Compressors
Air compressor lubricating oil is continuously affected by high temperature, oxygen, pressure, and metal catalytic effects during operation.
Over time, the oil undergoes oxidation and degradation, leading to sludge, carbon deposits, and eventually coking.
Oil Oxidation Is the Main Cause of Coking
The main components of lubricating oil are hydrocarbon compounds, including:
Paraffins
Naphthenes
Aromatics
During compressor operation, continuous exposure to high temperature and oxygen causes oxidation reactions.
These oxidation reactions can cause:
Molecular chain breaking
Molecular cross-linking
Increased oil viscosity
Higher acid value
Darkened oil color
Increased insoluble deposits
When oxidation becomes severe, deposits harden and form carbon-like substances, resulting in lubricant coking.
Poor oxidation resistance
Weak high-temperature stability
Short service life
They are more likely to oxidize and form carbon deposits under high-temperature compressor conditions.
High operating temperatures caused by:
Poor cooling performance
High ambient temperature
Blocked coolers
Excessive oil temperature
will accelerate oil oxidation and increase coking risks.
Use high-quality compressor lubricants
Maintain proper operating temperature
Inspect cooling systems regularly
Replace oil and filters according to maintenance schedules
Avoid long-term overload operation
The main cause of air compressor lubricant coking is oxidative degradation under high-temperature and oxygen-rich conditions.
Using high-quality lubricants and maintaining proper operating temperatures are essential to ensure stable compressor performance and extend service life.
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