Chlorinated solvent engine degreasers are a category of solvent-based, high-performance cleaning agents formulated with chlorinated hydrocarbons such as trichloroethylene (TCE), perchloroethylene (PERC), methylene chloride (dichloromethane), or similar compounds.
These degreasers are known for their exceptional cleaning power, non-flammability, and fast evaporation, making them ideal for removing heavy oil, carbonized residues, tar, and industrial contaminants from metal engine parts and mechanical assemblies.
They were once common in automotive and aerospace maintenance, but due to health and environmental concerns, their use is now regulated or restricted in many regions.
⚙️ Definition
A chlorinated solvent engine degreaser is a non-flammable, high-solvency cleaner composed of chlorinated organic compounds that efficiently dissolve oil, grease, and carbon deposits from engine exteriors and internal metal components.
These solvents work through chemical dissolution, breaking down hydrocarbon residues at a molecular level without requiring significant mechanical scrubbing.
🧪 Chemical Composition / Ingredients
Typical formulation components include:
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Chlorinated solvents – e.g., trichloroethylene, perchloroethylene, methylene chloride, or 1,1,1-trichloroethane; serve as the main active degreasing agents.
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Stabilizers / inhibitors – prevent solvent breakdown during use and storage.
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Corrosion inhibitors – protect metal parts after cleaning.
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Surfactants (optional) – allow limited rinsability with water.
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Fragrances / masking agents – minimize strong chemical odor in some formulations.
These ingredients combine to create a powerful solvent blend that can dissolve even baked-on or oxidized oil films.
⚗️ Properties
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High Solvency Power: Excellent for dissolving oil, grease, and tar residues.
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Non-Flammable: Safe for use near heat or electrical components (a key advantage).
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Fast Evaporation: Leaves no residue, dries quickly.
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High Density: Penetrates heavy grime and reaches tight areas effectively.
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Non-Conductive: Can safely clean electrical components (specific dielectric-rated versions).
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Odor: Strong, chemical odor due to chlorinated compounds.
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Stability: Resistant to oxidation and degradation under normal use.
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Material Compatibility: Safe on metals; may damage rubber or some plastics with prolonged exposure.
🧰 How It’s Used
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Application: Apply directly by spraying, immersion, or wiping onto dirty engine or machine surfaces.
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Dwell Time: Allow 1–5 minutes for solvent action to dissolve contaminants.
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Agitation (optional): Light brushing can assist in heavy build-up areas.
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Drying: Let air dry or use compressed air; the solvent evaporates cleanly without residue.
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Post-Cleaning: Surfaces are ready for painting, lubrication, or assembly immediately.
