B3-CV-14-D cal mounting position Type H Gear unit dimensions Bevel-helical gear units B3

Flender/Flender Gear Units/Bevel-helical gear units B3

periments 6 _____ -~ In addition to our own practical experience, the results of pilot projects on low-pollution proc ess technologies for aqueous pretreatment were also available No technical methods which could serve as basis were found for dewatering without freon Therefore, extensive experimental laboratoryworkwas required to find serviceable and practi- cal alternatives The studies of the electrodeposition of aluminium were carried out using an electrochemical test station in the laboratory and in conjunction with analytical methods used when working under inert gas lively exchan of experience with Berlin University of Technology began in this context, due to the paralle?projects being carried out there Study results obtained within the framework of projects and presented in detail in reports OlVQl3and OlVQl7couldalso beusedforthe low-pollution processtechnologiesused in the post-treatment of the aluminium coatings The technical literature concerning the electrodeposition of aluminium is limited to the docto- ral thesis of the discoverer of the trialkylaluminium complexes, several patents and ublications by the licensor and our own ers Further literature concerning the chemistry ofihe deposi- tion of aluminium from its akyycomplex apparently does not exist Similarly, no publications seem to have appeared concerning electrochemical studies in aproticsolutions containing alu- minium as an alkyl complex 3. Results The use of electroaluminium in place of toxic metals offers the possibilit of producing environ- mentally friendly coating systems which cause virtually no pollution. In thscontext, material is available which can, among other things, replace toxic cadmium as coating metal and is clearly superior to cadmium in many applications. The further development of electrolytes based on trialkylaluminium complexes, with the goal of increasing the deposition rate, has resulted in many new possibilitiesforthe technical use of electr