Acid protection
Acid protection is a collective term for corrosion protection measures for the preventive prevention of damage to apparatus, containers, system parts and buildings through the effects of acids . In some cases, acid protection is more generally defined as a protective measure in connection with the production or use - in addition to acids - of other aggressive substance groups such as alkalis , salts , fats , oils and solvents . The simultaneous mechanical or thermal stress on the systems and buildings is sometimes defined as part of the acid protection.
The neglect of acid protection measures can result in the destruction of systems and fixtures and lasting damage to entire buildings.
Affected industries (selection)
Acid protection is particularly important in the chemical industry and in metal processing . Other branches of the economy are also partially affected:
- Production of man-made fibers ,
- Extraction, manufacture and processing of oils, fats and soaps ,
- Food industry [e.g. B. Decaffeination of coffee beans with supercritical carbon dioxide (CO 2 )],
- Leather industry,
- Power plants and
Methods of acid protection
Particularly effective is the choice of suitable tool and materials that against the aggressive substances chemically resistant are. This strategy is called acid building or acid protection building . Acid protection in the narrower sense is often more economical. Protective layers are applied and, if necessary, sealed at the edge with acid cement. Containers and pipelines can be lined as a precaution, e.g. B. by ceramic plates or plastic coatings. The use of resin-like coatings ( screed , filler ), the lining with thermoplastic foils and the enameling of the inside of chemical reactors is also common. Acid protection has developed into a technical specialty within the building industry .
Individual evidence
- ↑ Otto-Albrecht Neumüller (editor): Römpps Chemie Lexikon , 8th edition, Frank'sche Verlagshandlung, Stuttgart 1983, ISBN 3-440-04513-7 , p. 3657, ISBN 3-440-04513-7 .
- ↑ a b c d e Brockhaus ABC Chemie , VEB FA Brockhaus Verlag Leipzig 1965, p. 1238.
- ↑ a b c d Hans-Dieter Jakubke, Ruth Karcher (coordinators): Lexicon of Chemistry in three volumes, Spektrum Verlag, Heidelberg, Volume 3, 1999, ISBN 3-8274-0381-2 , p. 201.