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Reference Object No 1 |
Application: Hydraulic Cylinders in Waste Water System Technology
Preventive corrosion control with
CORRPASSIV®
ASA Technik GmbH in Krefeld (Germany) has developed innovative hydraulic weir and filter systems for a cost-effective solution to the problem of necessary modernisation of waste water systems. The current designs made largely of stainless steel are increasingly being used not only in Germany, but also in other European countries and are saving public works developers between 10 and 50 million DM per waste water system.
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| Photo 1: Photograph of a waste water weir. |
Photo 2: Technical Drawing of a waste water weir. Hydraulic cylinders coated with CORRPASSIV are colourized. |
The company is now seeking to supply even lower-cost products through a large measure of substitution for the stainless steel components - by using high-performance coatings on normal steel surfaces. This must not however have any adverse effect on the functionality of the structures or their resistance to corrosive attack. In other words the coating systems used must ensure outstanding protection against corrosion in sometimes aggressive waste water, plus improved resistance to abrasion, waste water and chemicals. Conventional coatings soon proved unequal to the task.
The new CORRPASSIV® systems are eminently suitable for this task. Internal laboratory tests and external practical tests over a two-year period have shown that the required properties can be achieved by applying a CORRPASSIV® primer (20 µm) and a wear-resistant two-component epoxy top coat prescribed by the manufacturer. The components treated in this way are fully comparable with the stainless steel parts as regards corrosion behaviour, but offer a considerable additional cost advantage.
The company is now using normal steel coated with the CORRPASSIV® system described above for all hydraulic cylinders in its new weir systems, and is currently conducting further practical tests to investigate what other stainless steel components can be replaced in the same way.
Ormecon Chemie GmbH & Co. KG
- ein Unternehmen der Zipperling Kessler & Co. (GmbH & Co.) -
Ferdinand-Harten-Str. 7 • D-22949 Ammersbek • Tel.: +49-(0)40-604106-0 •
Fax: +49-(0)40-604106-51