DIN 50961 PDF

DIN Electroplated coatings – Zinc coatings on iron or steel – Terms, testing and corrosion resistance (Foreign Standard) This standard only applies in . Buy DIN () Electroplated Coatings – Zinc Coatings On Iron Or Steel – Terms, Testing And Corrosion Resistance from SAI Global. Buy DIN ELECTROPLATED COATINGS – ZINC COATINGS ON IRON OR STEEL – TERMS, TESTING AND CORROSION.

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Figure 2 shows the fracture edge of a bright zinc plated and hexavalent yellow chromated steel sheet at 40,x magnification. On this point, the condition laid down in the present invention model concept is supported by the practice.


Evaluation shall be carried out at normal reading distance without a magnifier. Bild 1 zeigt die Bruchkante eines glanzverzinkten und dreiwertig blauchromatierten Stahlbleches bei It was carried out the following experiment: The chromate coating consists of water-dissolved hexavalent chromate, conducting salts and mineral acids, and in particular of phosphates and silicofluorides substantially.

With the specially established kinetic model starting points for the optimization of the present invention rin win.

The breaking edge Figure 3 of a bright zinc plated and trivalent passivated steel sheet at 40,x magnification shows that this layer is almost exactly the same thickness as the yellow chromate in Figure 2. Preferably, the layer is more than nm thick and, on zinc, has a greenish red-green iridescent colour. In traditional chromate coatings it is just the soluble chromium VIthe washed under corrosion conditions, is rinsed over the exposed zinc layer of scratches and leads to a certain Nachchromatierung.

The chromate coating consists of water-dissolved hexavalent chromate, conducting salts and mineral acids substantially. Table 1 shows characteristics of zinc and zinc alloys, and alternative coatings.

On no account shall the translation be considered authorized by DIN. The parts were then rinsed with water and dried in air stream. Es gibt fluoridhaltige und fluoridfreie Varianten.

Ausblick outlook Weitere Eigenschaften, z. Wohingegen die Fluoridkomplexe kinetisch sehr stabil sind. In our industrial society galvanized and chromated metal surfaces are omnipresent.


The corrosion protection of unmarred black zinc amounts to h in the salt spray cabinet according to DIN SS until the first occurrence of corrosion products. Based on the old names, the new thick chromate III layer should Chromiting hot. This would probably be acceptable without further technical applications with a metallic appearance.

Niedax Galvanik GmbH

Since the Chromiting is not specified as a new layer, the editors of norms and standards are now invited to evaluate the properties of this coating itself.

Die Tauchzeit betrug 30 s. As the widespread yellow chromates such.

Die Ansatzpunkte a und b sind dem Fachmann bekannt. Charakteristik von Zink und Zinklegierungen sowie alternativen Beschichtungen Characteristic of zinc and zinc alloys, and alternative coatings. This was offset previously against the technical advantages and the low price hexavalent chromate coatings.

The procedure can be performed in conventional electroplating plants, has now applied for a patent. Metal member with chromate coat, spark plug with chromate coat and manufacturing methods thereof. The new greenish chrome VI free chromate is accordingly depending on the production temperature between and nm thick, pale green in color and the natural red-green iridescent.

The method according to any one of claims 2 or 3, characterized in that the ligands of the chromium III complex are selected from the group consisting of: Bild 4 zeigt die Mittelwerte der dort chromitierten Teile sowie Praxiswerte von dreiwertigen Blau- und sechswertigen Gelbchromatierungen aus diversen Anlagen. Die Bruchkante Bild 3 eines glanzverzinkten und dreiwertig passivierten Stahlbleches bei Cancers can be caused by many factors.

Die Tauchzeit betrug 60 s.

DIN – European Standards

Malonic acid is a ligand of an on chromium III enables faster ligand replacement kinetics than the fluoride from Example 1. The passive layer was gray. Feuerverzinkte Dim sind chromitierbar. Table 2 shows for chromating zinc according to the prior art.

A method according to any one of claims 17 or 18, characterized in that it is a warm working chromating with rinse water over at least 2 cascaded rinsing stages. Something different is the situation in the coating of the barrel process.


Composition, useful to passivate zinc and its alloy, comprises passivation solution comprising chromium III -compound, soluble nitrates, fluorides and organic acids, and an activation solution comprising e. The Blauchromatierungsschicht is up to 80 nm thick, pale blue in the color of their own, and has depending on the layer thickness of a golden, reddish, bluish, greenish or yellow iridescent color generated by light refraction.

Beschleunigung der Hinreaktion II. BS EN Corrosion protection of metals — Non-electrolytically applied zinc flake coatings on iron or steel components.

The natural color of the Chromiting on pure zinc, as shown in Figure 5, transparent with a very bright, greenish iridescent coloration. The method according to claim 19, characterized in that in one of the rinsing stages a blue chromation is performed. Kleine Stahlteile wurden elektrolytisch glanzverzinkt ca.

The layer produced is dunkelgrau- greenish and provides in addition to an excellent corrosion protection is also an excellent primer for a lacquer coating. The tanh function ensures a smooth transition from 0 to 1, which can be set with p. Accordingly, the chromate contained with said requests to the Cor rosionsschutz even these extremely toxic and carcinogenic chromium VI – compounds, which are also not completely immobilized in the layer.


The reaction I and the forward reaction II must take place as soon as possible, the reverse reaction II must remain slow. Further advantageous ligand arising from the list according to claim 6 and 8. For this, there are the following approaches: Figure 4 shows the corrosion protection of blue and yellow chromate compared to Chromiting.

A low pH favors the dissolution of zinc, but also provides for cin redissolution of the layer. The corrosion protection of intact olive chromatings amounts to h in the salt spray cabinet according to DIN SS until the first occurrence of corrosion products.