Blue Chromating - Blue Passivating

Blue Chromating - Blue Passivating
€13.09 inkl. MwSt.
€11.00 ohne MwSt.
Content: 0.25 Liter (€52.36 * / 1 Liter)

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  • SW10025
Product information "Blue Chromating - Blue Passivation" from Betzmann Galvanik  ... more
Product information "Blue Chromating - Blue Passivating"

Product information "Blue Chromating - Blue Passivation" from Betzmann Galvanik

 

Fields of application

Blue chromating is used to protect existing zinc coatings or galvanically applied zinc coatings from oxidation and "tarnishing".

It thus provides protection against zinc oxidation, but can hardly or not remove already existing oxidation. Furthermore, the slight yellowing caused by the brighteners of the Betzmann Galvanik zinc electrolyte after galvanizing can be removed by blue chromating. In this way, the galvanized objects are given a noble and visually appealing finish. In addition, chromating is often applied to aluminum workpieces.

Blue chromating data

 pH value: 2 - 3

Working temperature: room temperature (20 30°C) Immersion time: 15 s to 2 min

 

 

Effect of immersion time in blue chromate coating

Tauchzeit [s]

ffekt

5 - ­ 15

the yellowing caused by brighteners disappears

15 - ­ 45

bluish shimmering, glossy surface

45 -­ 120

Becomes increasingly matt 

Corrosion protection increases

 

Use of the blue chromate

Place the blue chromate in a suitable container and immerse the galvanized object in the chromate for a time between 15 and 120 seconds. Chromating must be done as soon as possible after galvanizing, otherwise a passivation layer will form on the zinc, making chromating impossible. With an immersion time of only 15 s, the yellow coloration disappears (see above). As the immersion time increases (approx. 30 s), a slightly bluish shimmering surface develops. If the immersion time is even longer, a more matte effect can be achieved. This layer then also has the highest corrosion resistance, although it is not as shiny. The times mentioned are not binding, it also depends on the condition of the zinc coating, temperature, etc. Therefore, check regularly whether the result corresponds to your wishes. Important to know: the zinc layer is removed by chromating! However, a maximum of 2 µm after a dipping time of 4 min.

 

Safety advice

Causes skin irritation. Causes severe eye irritation. 

Wash hands thoroughly after use. Wear protective gloves / protective clothing / eye protection / face protection.

Wear face protection. IF ON SKIN: Wash with plenty of water.

If skin irritation occurs: Seek medical advice / medical attention.

Remove contaminated clothing. IF IN EYES: Rinse cautiously with water for several minutes. Remove existing contact lenses if possible. Continue rinsing.

 

Disposal

 

Please contact your local waste disposal company or your pollutant collection point for information.

 

 

blauchromatierung

 

 

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