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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May Table 5: If necessary, the processes shall be optimized. Zinc-nickel transparent transcor Learn more. Our surfaces From anti-corrosion surfaces to innovative processes in minimised variations – learn more about our wide range of products View our surface coatings.
Chromium VI -compounds could be used in the past in the intermediate layer between the metallic coating and an organic finish. Zinc-nickel coatings therefore demonstrate the best behavior of the metallic db within this DBL with regard to corrosion protection quality.
All parts shall be delivered without corrosion products. For information on the achievable corrosion resistance for barrel and rack parts, refer to VDA specification VDA which is based on comprehensive interlaboratory tests. To the customer benefits.
Zinc plating specifications and plating treatments – Turin – ZINCOPLATING
Screws, bolts and nuts with coarse-pitch or dbk 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. 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.
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. The stated requirement values — transferred to the procedure of this DBL — are in many cases comparable and currently represent state-of-the-art technology.
The significantly higher corrosion resistance of the metallic coating in combination with the less prominent corrosion products compared to pure zinc coatings dgl the low-alloyed zinc-iron coatings are characteristic of zinc-nickel coatings. For this reason the Cr VI -free product versions contained in the following table, which shall comply with these statutory requirements, are marked specially with the supplement Cr VI -free.
Dip Spin Specifications
Cr VI may be contained in the coating systems up to this deadline. Zinc-nickel black blackcor Learn more. 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. However currently there are no specifications which ensure that such layers do not contain additives with Cr VI content.
Buildings and industrial fittings Mechanical engineering ackaging industry.
Performance overview – a wide range from coatings to component cleaning – Holder Oberflächentechnik
This in turn causes some of the metallic coating to be dissolved, and a chromate coating is formed consisting of the various chemical constituents in the coating and the chromating solution ingredients. The applicability of these rbl of coating systems shall be ascertained in each case by means of suitable investigations. For any parts currently still in delivery phase which have a ZnCo coating, the requirements specified in DBLedition 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.
Automotive and supplier bdl e. Confidentiality of the revealed data shall be assured. The requirements contained within this DBL apply to these areas only. Zinc-iron black blackcor Learn more. Incorporation of new product versions PVs for systems, made of chromium VI -free materials.
The abbreviations used there, and the information on exceptions and on corrosion resistance are explained in Tables 5 and 6.
Classification of corrosion resistance Kb Kb I Transport and storage protection, installation in oil gallery Kb II Very low corrosion resistance, installation on non-corrosive areas Kb III Low corrosion resistance, for parts, which may alter visually through corrosion Kb IV Medium corrosion resistance, for parts, in areas subject to a low level of corrosion Kb V High corrosion resistance, for parts in visible area, or where corrosion must be excluded for functional reasons Kb Vl Extremely high corrosion resistance.
SS individual anodisation Anodised individual hybrid Partial plus ddbl. Zinc-iron black blackcor Learn more.
Protection against base metal corrosion: Hand-held laser medical technology. Individually dyed anodised surfaces.