Zinc Nickel Plating ( ZnNi ) in Hydraulic System

Zinc Nickel Plating ( ZnNi ) in Hydraulic System

Zinc Nickel Plating ( ZnNi ) in Hydraulic System

Rusting is an important problem in hydraulic system parts, especially in systems operating outdoors or in humid environments. As Hidroman, we apply the zinc-nickel coating technology, which is the best coating method for rusting, on all products.

Zinc Nickel Plated

Nickel content 12% - 15%
It is the most effective anti-corrosion coating today that does not contain Chromium-6.
Application of chromium-6-containing types of surface coatings is prohibited within the EU. ( September 2017 )
The main reason for this ban is that Chromium-6 component is allergen, carcinogenic and poisonous in terms of human health.
Another reason is to prevent possible damage to the environment.

Standard and Future oriented

EU compatible , Future compatible

ZnNi coating has gained a strong position in the market of carbon steel pipe fittings. It replaces applications that have expired and meets all the conditions specified in EU Standards. (  EU directive No. 2000/53/EG ).
The use of ZnNi coated products is increasing rapidly as many end users prefer ZnNi coated products instead of Chromium-6 coated products, which are banned without waiting for the end of their usage period.
Highlights

High resistance to corrosion
White rust appearance (according to DIN EN ISO 9227) after 480 hours.

Red rust appearance (according to DIN EN ISO 9227) after 720 hours.

These test results show that ZnNi coating has a remarkable corrosion resistance compared to A3B coating.

Mounting features
With the special coating method applied on the threads of the nuts produced in accordance with Hidroman standards, the frictional damages that may occur on the coating on the tooth surfaces are minimized. This method has been used for a long time in A3B coatings as well. Due to corrosion, it is not possible for the torque applied during assembly and disassembly to remain at the same values. This situation causes negative effects such as damage to the coating on the teeth and a decrease in corrosion resistance.

 

The corrosion resistance of the ZnNi coating on the tooth surfaces is high.

Environmental Impact
The ZnNi surface coating complies with EU standards and other Chromium 6-free requirements. ( Directive 2000/53/EC )

Painting
ZnNi coated products can be painted using industrial paint. Currently, many machine manufacturers apply this process.

However, in cases where the necessary test data for the paint is not available, we recommend that the paint be tested and applied.

Color and Appearance
ZnNi coating is metallic gray on iridescent blue and has a modern look.

strength
ZnNi coating is resistant to all hydraulic fluids.

ŸHigh resistance to corrosion.

Ÿ

Ÿ Adhesion resistance and high corrosion resistance even at high temperature differences.

ŸAn economical alternative product to stainless products.
(Only where conditions of use are appropriate)

ŸHigh rate of use and application.

ŸLow Factory maintenance cost.

CORROSION RESISTANCE

Ÿ > 480 hours; White rust did not appear. ( DIN ISO 9227 )

Ÿ > 720 hours; Red Rust did not appear.( DIN ISO 9227 )