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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Zinc-nickel flexible fleXXcor Zinc-iron black blackcor. This usually also serves to remove any interference color. Screws, bolts and nuts with coarse-pitch or fine-pitch thread, which are manufactured according to this DBL and not according to DBLshould always be treated with antifriction agent, insofar as this is not ruled out by other reasons, for example the need for an additional coating with adhesives.
These product versions may no longer be used as of on vehicles which are subject to the EU End-ofLife-Vehicle Directive. In addition to this, the coater is expected to assess the process in detail FMEA with regard to all dbll, in which hydrogen could ingress into the material structure.
The EU End—of-Life Vehicle Directive including the requirements with regard to freedom from Cr-VI shall be complied with for the corresponding identified product versions. The effectiveness of the heat treatment shall always be documented.
May Table 3 Cr VI -free coatings in which the product versions are retained and Cr VI freedom for supply of samples and production deliveries as of is required; technical data and requirements The friction coefficients required for threaded parts are defined in DBL Acceptance requirement SS h up to up to ZnFeCorrosion 48 24 24 72 72 Acceptance dbp Chromium VI -compounds could be used in the past in the intermediate layer between the metallic coating and an organic finish.
Zinc-Nickel (Zn-Ni) Plating: process and advantages
In accordance with one requirement, 3 2 then means 3 cycles of corrosion freedom for the head or the wrench area and 2 cycles for a bolt’s shank and thread. By doing so the newly electrodeposited coating reacts with the passivation solution to form a thin film composed of complicated reaction products, which cover the metallic coating.
However, the standard is not valid for fasteners with threads. Bending of the components is recommended as an additional adhesion test, as far as practicable.
Page 9 DBL Additional DaimlerChrysler standards required: Coating systems Learn more. Headquarters of the Holzapfel Group Phone.: These types of coating systems are standardized as “duplex coatings” in DIN One assumes here that today a major portion of these layers are supplied as Cr VI -free.
The use of sealants with integrated lubricants which may have an effect on the sliding properties of the finish is not permitted in principle with regard to these components. Whereas for colored chromate coatings yellow, black, olive one can assume that they contain Cr VI compounds, this is not assured for transparent or blue chromate coatings.
Systems specially designed for your component. The significantly higher corrosion resistance of the metallic coating in combination with the less prominent corrosion products compared to pure zinc coatings and the low-alloyed zinc-iron coatings are characteristic of zinc-nickel coatings.
This should serve to ensure that for these systems too, the changeover to Cr VI -free should be possible without any need to change the drawing. Chrome plating gloss, semi-matt Learn more. The resulting measures shall be specified by the coater. The approximate minimum coat thicknesses of the metallic coatings as shown from previous experience are indicated.
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 db, the surface protection required, the process dbk used is not yet known.
The coater shall be notified of this. Confidentiality of the revealed data shall be assured.
Subsequent sealing results in a further improvement of the corrosion protection. Various systems are used, including those with lubricant additives. In comparison with traditional zinc surfaces, the corrosion protection is clearly improved, even when the platings are thin.
Dip Spin Specifications
Hand-held laser medical technology. ZnCo dvl coatings no longer part of specifications. This type of surface finish is usually used on steel, ferrous cast components and powdered metals. Page 2 DBL Zinc-nickel black blackcor Learn more.
Dip Spin Specifications
Page 5 DBL The coatings are used for corrosion protection under the most stringent of requirements and for deep-black coloration.
Our surfaces From anti-corrosion surfaces to innovative processes in minimised variations – learn more about our wide range of products View our surface coatings. More processes and coatings.
The treatment of incorrect coatings removal of coatings and new coatings shall be dvl and the resulting consequences specified.
A sufficient number of in-process preloading tests on suitable hydrogen sensitive samples shall be used as the basis for establishing the suitability of the process for coating critical components. May this DBL, without the functional properties of the components being impaired or altered in any way. Requirements for the base material corrosion protection also apply to these areas, dvl. Page 14 DBL