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Search for Successfully Implemented Alternatives

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.

In order to utilize information in the best way, please take note of the SUBSPORTplus methodology on case stories!

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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.

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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.

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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.

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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.

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