Use in agricultural engineering places high demands on corrosion resistance
STAUFF as one of the leading manufacturers of hydraulic line components and accessories uses a zinc/nickel surface coating for components made of steel
The use of components in agricultural machinery places high demands on the corrosion resistance of hydraulic pipework components, such as pipe, tube and hose clamps, tube connectors, flanges, hose connectors, quick couplings, ball valves and flow control valves as well as test points.
They are not just exposed to usual weather and climate-related hazards, but frequently come into contact with particularly aggressive substances: with fertilizers containing phosphate or nitrogen, pesticides, cleaning concentrates, oils and other media.
STAUFF as one of the leading manufacturers of hydraulic pipework components and accessories has been using a zinc/nickel surface coating for steel components for fifteen years now, which offers extremely good protection against red rust or base metal corrosion, even compared to other manufacturers’ zinc/nickel coatings. A large proportion of the product range is produced as standard with the chromium VI-free zinc/nickel surface coating.
The coating offers over 1,200 hours of resistance to red rust / base metal corrosion under practical test conditions in the salt spray chamber in line with DIN EN ISO 9227. It therefore exceeds the most demanding requirements, as defined in the VDMA Standard Sheet 24576. However, there are no other general standards or cross-manufacturer regulations, for instance governing fertilizer resistance.
Test Chamber for Hazardous Substances
According to Thomas Butzki, Head of the Test Laboratory in the STAUFF Technology Centre in Werdohl: “For us as a manufacturer of quality components, the salt spray chamber test is inadequate as the sole comparable criterion.”
STAUFF components with a zinc/nickel coating are exposed to aggressive media, such as hydraulic, lubrication and engine oils, fuels, coolants, brake fluids etc., in a test rig specifically developed to determine the resistance of materials and coatings.
“We also offer the manufacturers of agricultural machinery the opportunity to individually test our products with fertilizers, pesticides, cleaning concentrates and other media. The assessment of our zinc/nickel coating can be proved and its resistance objectively demonstrated by means of clearly defined and practical conditions and time periods accompanied by appropriate documentation,” concludes Thomas Butzki.
The research laboratory in the Technology Centre at the Werdohl Ehrenfeld site, which was last extended to over 800 square metres in 2018, is the centerpiece of STAUFF's research, development and design activities.
In particular, the state-of-the-art test equipment available there plays a crucial role in the development of new, innovative products and the ongoing optimisation of existing solutions, the implementation of customer-specific test criteria and the attainment of approvals and certificates by independent institutes, organisations and authorities.
Typical Application for STAUFF Products
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