en sions for the high speed shaft HSS with fan mus B4-DV-19-D Bevel-helical gear boxes B4

Flender/Flender Gear Units/Bevel-helical gear boxes B4

ults can be obtained for up to 2,0 hours in the neutral salt spraytest with some epoxy systems, including the polyester resin system mentioned. The lower limit of the coating thickness appears to be approx. 2 to 3 [MCr].- good rotective effect on aluminium was obtained with phenolic resins, particular ? the 3.3 Sub-project II . ,,Passivation of galvanised steel strip" In concluding study, the best products from the individual substance classes were tested against each other. 8 It became apparent that, until now, sufficient corrosion resistance cannot be achieved by urely organic treatment The use of metalorganic pretreatment at fairly high concentrations ped to considerable improvement in comparison with sheets which were merely oiled or degreased process based on zirconium phosphate with an increased phosphate concentration and organic film-forming components approached the level of corrosion protection afforded by tohe chromicacid treatment rocess, althou ha drying temperature (object tem erature) of 7 must be observed Basefon the results 2escribedabove. it may be assumed \at combina- tion of processes 4and 6 will lead to further improvement However, this could not be tested within the time frame of the project 3.4 Sub-project 1 ,,Rinsing phosphate coatings" The studies in this sector have shown that widely fluctuating values result from the use of organic rinsing solutions on various substrate materials, even in combination with zirconium hydrofluoric acid. The worst result is observed (except on aluminium) with the molybdate pro- cess. Similarly, inadequate results are obtained with zirconium aluminates, except on alumin- ium. The relatively good result of zirconium aluminates on aluminium correlates with the ood results obtained with zirconium aluminates in the conversion treatment of aluminium ?Sub- project ). Pores still present in the phosphate coating are closed by the passivating agent which is particularly suitable for al