DBL 8451 PDF


The Holzapfel Group plates zinc-nickel according to the following standards: VW TL , DBL , Opel GME , GMW , BMW GS and DIN. The Holzapfel Group plates zinc iron according to the following standards: VW TL , DBL , BMW G , GME , GMW , DIN Zinc-iron. specification DBL 17 which details that a 10 to 15 micron deposit should provide NSS. 9 protection of hours with no zinc and hours with no red.

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Reference to DBL omitted? If necessary, an agreement concerning surface quality may have to be made.

Zinc plating specifications and plating treatments – Turin – ZINCOPLATING

The type of additional coating is subject to agreement. As ofthis DBL therefore requires that these types of systems be delivered chromium VI -free in accordance with this DBL, without the functional properties of the components being impaired by it or altered in any way. As of it is necessary for these types of systems to be delivered chromium VI -free in accordance with Continued on pages 2 to 16 Technical coordination by Central Materials and Process Engineering DaimlerChrysler AG Technical responsibility Name: To be certain that Cr VI -free products are used a conversion to the special product versions of this Fbl is necessary.

All parts vbl be delivered without corrosion products. Dbbl compatibility of the temporary corrosion protection materials with the operating fluids used during driving shall be assured.

Anodised Individual Learn more. Distribution as well as distribution of pages without permission of DaimlerChrysler AG is not permitted. When sealing, special care shall be taken to ensure that the inner surfaces of tubes fulfill residual contamination requirements, or that they are compatible with the operating fluids.

Screws, bolts and nuts with coarse-pitch or fine-pitch thread, which are manufactured according to this DBL and not according to DBLshould always db treated with antifriction agent, insofar as this is not ruled out by other reasons, for example the need for an additional coating with adhesives. With regard to screws and bolts, these requirement exceptions are generally applicable to the shank and thread.


More processes and coatings. These product versions may therefore only be used where the prohibition of Cr VI vbl in corrosion protection coatings is not of relevance to the selected components see hereto also the notes in Dgl 1 of this DBL.

General reference values for heat treatments for hydrogen effusion When coating components ddbl are potentially subject to hydrogen embrittlement it is also expected that in addition to the measures specified above, additional preloading tests are performed to document the reliable uncritical process cycle. SS individual dbk Anodised individual hybrid Partial plus anodisation. These types of coatings have been specified since with substrates made of pure zinc and since with base coatings made of zinc-nickel in DBL and standardized since in DIN For notes on corrosion resistance and recommendations for various application cases, see Tables 2 to 4.

Systems specially designed for your component. The approximate minimum coat thicknesses of the metallic coatings as shown from previous experience are indicated. Individually dyed anodised surfaces. Parts are generally coated in barrels, baskets, trays or on belt and rack technology. The use of special products may become necessary in this respect. Zinc-nickel transparent transcor Learn more. Top coats or subsequent paintwork with higher layer thickness shall not be used as sealings.

Chrome Copper Chrome plating gloss, semi-matt Eloxal. The product actually used for the creation of the passivation designation, manufacturer shall be indicated.

Surfaces – Anti-corrosion surfaces – Zinc-nickel. Pickling Polishing, mechanical Sand blasting. Passivations are available in black or transparent form. May this DBL, without the functional properties of the components being impaired or altered in any way. In such instances, the areas essential for surface protection shall be specified.

Any changes to the production coating process, which – subject to state-of-the-art technology – may exert an influence on the properties of the base material or the coating, shall be notified to DaimlerChrysler immediately and without further request.

Customer benefits Learn more about the added value you get by working together with Holzapfel Group To the customer benefits. However, the standard is not valid for fasteners with threads.


Otherwise the use of fast-to-handle lubricants for threaded ebl shall be examined. May Table 2 Cr VI -free electrodeposited coatings; technical data and requirements The friction coefficients required for 88451 parts are defined in DBL Parts categor Recomme y nded layer with thickness or?

More processes and coatings. To the customer benefits. Handling of tube inner surfaces specified.

Dip Spin Specifications

Although the End-of-Life Vehicle Act does not currently apply to heavy-duty trucks or buses, for reasons of variant reduction in new designs, consideration should be given to also specifying Cr VI free surfaces for commercial vehicle parts. From anti-corrosion surfaces to innovative processes in minimised variations – learn more about our wide range of products.

May General reference values are provided in Table 1 below: For this reason, alongside the corrosion protection, attention shall also be paid to any possible changes in surface-specific functional properties in comparison to coatings containing Cr VI. Measures shall be derived from this, which serve to reliably minimize the quantity of hydrogen ingressing into the material during the process, and which enable a regular periodic examination of the efficiency of such measures.

The electrolytic plating process zinc-nickel stands out with very good corrosion protection and a high thermal resistance. The standard requirements apply to surface areas not impaired by the forming process. Zinc-nickel black blackcor Learn more. One assumes here that today a major portion of these layers are supplied as Cr VI -free. Technical Special Nickel Plating Learn more.

Functional nickel Learn more. Care shall be taken to ensure that the properties of the parts are not impaired in this process. Here, it is irrelevant dbll material containing Cr VI was used during the production process or not. Preservation of uncoated internal surfaces, for example the inside of pipes, as well as heat treatments tempering to remove hydrogen after the coating process, are offered to complement our range.

Silver Ag Learn more.

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