“Brake cleaner”的意思、由来-开放百科全书

词条

Brake cleaner

释义

Use
Danger
Alternatives
References

{{refimprove|date=February 2019}}Brake cleaner, often also called parts cleaner, is a mostly colorless cleaning agent, mainly used for cleaning the brake disks, the engine compartment and underfloor of motor vehicles. An important feature is that the brake cleaner leaves no residue after the solvents evaporate.^[1]

Almost all brake cleaners include hydrocarbons as a main component; it will either be a low boiling aliphatic compounds or higher boiling hydrocarbon mixtures are used. aromatics like benzene, toluene or xylene may also be used. The hydrocarbons used are sometimes made by hydrogenation from naphtha. The lipophilic Liquids dissolve fat-soluble lubricants or oils. Some products also contain polar solvents such as ethanol, isopropanol, and acetone in order to dissolve non-lipophilic substances. Many formulations are incompatible with various materials, especially plastics.

Use

The main application of brake cleaners is the degreasing and cleaning metal parts or metallic surfaces. They are used for removing oils, fats, resins, tar and dust, mainly in the automotive sector.

About 10 million liters are consumed per year in Germany.^[2]

Danger

Brake cleaners contain toxic compounds and should only be used in well-ventilated areas or outdoors. They are highly flammable and harmful for environment, which also has to be considered during storage. Skin exposure to the solvent mixture may cause irritation and defatting injury.

Rubber and some types of plastics are decomposed by brake cleaners by removing binding components. This has the consequence that the rubber after the first appearance appears unchanged, however brittle and after a few weeks to months cracks and fractures appear.

Alternatives

For frequent and industrial use, cleaning and degreasing may be alternative supercritical carbon dioxide or dry Ice blasting which is abrasive. This requires a setup to apply the carbon dioxide. The harmful vapors are eliminated, the CO₂ must be ventilated, however. Apply the carbon dioxide causes electrostatic discharge by the expanding gas. The dust and harmful brake dust is not bound in the liquid.

References

1. ^Explosionsschutz beim Umgang mit brennbaren Reinigern in der Kfz-Werkstatt (PDF; 762 kB).
2. ^Explosionsschutz beim Umgang mit brennbaren Reinigern in der Kfz-Werkstatt (PDF; 762 kB).

3 : Cleaning products|Vehicle braking technologies|Pages with unreviewed translations

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