B3-KV-26-A GGD N D t c G dD kn x s Shaft seals see page Bevel-helical gear unit B3

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

s of chromatization as an intermediate layer in the wet-in-wettechnique Aged, - Possibility of decoating It must be possible to remove coating from racks, barrels and defec- dry chromatizations are bad adhesion promoters tively coated material ~ 7 - Selection of suitable coating systems The coating property changes from manufacturer to manufacturer Within certain limits it is possible to modify the properties by changing the coating ingrediences and adapt them to the given condition After solving these problems the adaption of the technique for the coating of bulk goods should be carried out as another aim of this project It has been planed to use the electroplating process of the barrel coating without changes huge expenditure of developing work had to be done in the range of the coating process The problems which had to be solved are as follows - Electriccontacting of the barrels goods Coating on the cathodeand on the product increase the transition resistance - Complete coating of the product surface While coating the contacting surfaces will not be coated of the westing bulk material, but with barrel rotating coating scratches will occure - Stickin together of the coated material during the burn-in The sticking together of the coate8material has to be avoided as well as the sticking on the oven panel These questions should be clarified first in the labscale and afterwards tested in thetechnicum scale Thereby,,scale upprob1emsforthe technique should be recognized early and solution should be found in advance 3. Results This &-project leads to the following results: The developed technique is based on coating sequence with electroplating of the steel followed by cataphoreticdip-coating carried out in separatefirms. If the dipcoating is deposit- ed on fresh zinc layers some questions occur which can be answered as follows: Compound adhesion: - No separation of the zinc-layer from steel as result of hydrogen desorption. Hydrogen wh