Case story database

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You can use the free text search function to find information in the case story database. Most suitable are: substance name and other substance identifier (EC- and CAS-number). You can refine your search after first entry for sector-, function- and process-categories. The case studies are meant to serve as source of inspiration and ideas for substitution. The alternatives are constantly being developed further. We therefore recommend that you to check in each individual case whether an alternative is suitable for your applications and purposes. If you are aware of any other relevant information that is not mentioned in the current case story, please contact SUBSPORTplus.

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Substitution of sulphuric acid with hydrochloric acid for degreasing metal before zinc and chromium plating.

Metallic coating on metal parts is often performed by galvanic processes. To achieve good-looking surfaces of good quality it is necessary to first clean the items. Earlier the company used sulphuric acid for pickling. The acid was heated and therefore some of it evaporated from the tank. By substituting sulphuric acid with hydrochloric acid pickling not only became more efficient, moreover, hydrochloric acid does not need to be heated.

Galvanic processes with acid zinc instead of cyanide zinc.

An electroplating company in Denmark made changes in the production process for galvanising. They substituted zinc cyanide by zinc chloride.

Corrosion protection within industrial surface treatment

For industrial surface treatment the products are usually chosen on a basis of their technical properties. These products, however, can have serious consequences for the working environment and the external environment. The brochure that provides the basis for this case story contains a ranking system used for industrial surface treatment which takes the working environment and the external environment into account.

Reinigung von Einzelteilen der Fahrzeuglenkung durch Injektionsfluten

Ein großer Automobilhersteller aus Deutschland reinigte Bauteile für Fahrzeuglenkungen mit einer Reinigungsanlage unter Einsatz von chlorhaltigen Lösungsmitteln. Nun benutzt das Unternehmen eine Anlage zum Injektionsfluten in Kombination mit einem Reiniger, der Kaliumhydroxid und 2-Aminoethanol enthält.

Cleaning of car steering components by injection flooding

A large car manufacturer from Germany cleaned car steering components, with a cleaning unit using chlorinated solvents. Now the enterprise uses an injection flooding plant in combination with a cleaner containing potassium hydroxide und 2-aminoethanol.

Sprühnebelunterdrückung bei der Hartverchromung mit Hilfe von nicht auf PFOS (Perfluoroctansulfonat) basierenden Tensiden

Das dänische Amt für Umweltschutz und einige dänische Unternehmen haben ein Projekt zur Substitution von polyfluorierten (PFOS) Tensiden zur Verwendung für nicht dekoratives Hartverchromen durchgeführt. Ergebnisse auf Laborebene und größerer industrieller Ebene haben gezeigt, dass es möglich ist, die PFOS als Mittel zur Sprühnebelunterdrückung in der nicht-dekorativen Hartverchromung zu substituieren.

Mist suppression with non-PFOS (perfluoro octane sulfonate) surfactants for hard chrome plating

The Danish EPA and some Danish companies carried out a project on substitution of polyfluorinated (PFOS) surfactants for use in non-decorative hard chrome plating. Experiments on both laboratory scale and larger industrial scale have shown that it is possible to substitute PFOS as mist suppressant in the non-decorative hard chrome plating process.

Extremes Hochgeschwindigkeits-Laserauftragschweißen (EHLA) als technische Alternative für bestimmte Anwendungen der Hartverchromung

Chromsäure wurde 2013 in die REACH-Zulassungsliste aufgenommen und seine Verwendung erfordert seit 2017 eine Zulassung in der EU. Extremes Hochgeschwindigkeits-Laserauftragschweißen (EHLA) kann eine Technische Alternative zur Hartverchromung darstellen, welche besonders für rotationssymmetrische Bauteile geeignet ist. Das Verfahren bietet eine Alternative für Anwendungen, bei denen erhöhte Anforderungen, z. B. an die Haftfestigkeit der Beschichtung sowie das Verhindern des Korrodierens der beschichteten Fläche und dem Schutz vor dem Verschleiß des behandelten Metalls, gestellt werden.

Extreme High-speed Laser Material Deposition (German: EHLA) as technical alternative for certain applications for hard chrome plating

Chromic acid was added to the REACH authorisation list in 2013 and its use requires authorisation in the EU since 2017. Extreme high-speed laser material deposition (German: EHLA) can provide a technical alternative to hard chromium plating, which is particularly suitable for rotationally symmetrical components. The process offers an alternative for applications where increased requirements are made, e.g. on the adhesion of the coating as well as the prevention of corrosion of the coated surface and protection against wear of the treated metal.

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