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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The Holzapfel Group plates zinc iron according to the following standards: Systems specially designed for your component.

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: The following product versions have been removed: The coatings are used for corrosion protection under the most stringent of requirements and for deep-black coloration.

The dgl behavior of the inner areas of a tube following the laboratory corrosion tests is not assessed. Specifications Customer benefits Downloads Newsletter registration. The low-alloy zinc-cobalt coatings formerly available in France are no 845 as important, and for this reason they are not included in this DBL.

Performance overview – a wide range from coatings to component cleaning – Holder Oberflächentechnik

Chromium VI -compounds could be used in the past in the intermediate layer between the metallic coating and an organic finish. For production deliveries, the supplier shall conduct an in-process quality inspection and make the values available on request.


Process 845 shall be safeguarded by means of component tests.

The corrosion resistance test is deemed to have been passed when each respective requirement in the tables of this DBL is complied with. May this DBL, 84511 the functional properties of the components being impaired or altered in any way.

Handling of tube inner surfaces specified. Black chrome Learn more.

Zn-Fe (Zinc-Iron)

More processes and coatings. For notes on corrosion resistance and recommendations for various application cases, see Tables 2 to 4. The electrolytic plating process zinc-nickel stands out with very good corrosion protection and a high thermal resistance. For parts without a thread, the size of 84451 component and its design, along with the technology available at the coater’s, will determine whether the coating process should be performed using the less expensive barrel plating method or by rack plating.

ZnCo alloy 8541 no longer part of specifications. Chrome Copper Chrome plating gloss, semi-matt Eloxal. The abbreviations used there, and the information on exceptions and on corrosion resistance are explained in Tables 5 and 6.

Zinc-Nickel (Zn-Ni) Plating: process and advantages

In contrast to national and international standards, these Supply Specifications do not differentiate between the manufacturing process for barrel or rack coating, because often when determining the surface protection required, dgl process technology used is not yet known.

For this coating system the numbering of the product versions does not change when the transition is made to Cr VI -free. Zinc-iron black blackcor Learn more. The Holzapfel Group plates zinc-nickel according to the following standards: Pickling Polishing, mechanical Sand blasting.


Top coats dbbl are optional for the further improvement of the corrosion protection, but are not always necessary. Zinc-nickel flexible fleXXcor Zinc-iron black blackcor. Sealings for product versions.

Before commencement of production deliveries, the coater shall determine and record the complete pre-treatment and coating process, the physical data treatment periods, temperatures and the composition of all process chemicals, and, if required, optimize them.

In many cases, parts with a thread bolts, nuts can be coated in the drum. The relevant measures and tests such as minimization of component stresses, selection, composition and checking of chemicals, physical and chemical method limits, type of tests, test frequency, number of specimens etc.

Preloading tests on real-life components that have been zinc-coated in a deformed fixture, in which the component is subjected to stress close to the weld seam through stresses in the yield strength area. One assumes here that today a major portion of these layers are supplied as Cr VI -free. In such instances, the areas essential for surface protection shall be specified.

View our surface coatings. Requirement values for chromium VI -free layers adapted to state-of-the-art technology. This usually also serves to remove any interference color.