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Abstract
In the last years many studies on IBAD coatings on metals and insulators for wear reduction and corrosion protection have been published. However the IBAD deposition of larger areas (>10 × 10 cm) is still a major problem. Therefore we have developed a coil coater running inside the IBAD deposition chamber and allowing very flexible deposition modes. Single layers, multilayers and alloys can be deposited under ion bombardment on substrates up to 30 by 40 cm or on metal and polymer strips 30 cm wide. A number of examples dealing with Zn-alloy coatings on low alloy steel are reported: pure Zn-coatings were compared with Zn/Ti-alloys Zn/Cr-alloys and Zn/Mn-alloys. In some cases also multilayers of the different metals were studied in the static and dynamic operation mode. The coatings had a thickness of 2–8 μm and their corrosion behaviour was investigated by salt spray tests. The microstructure of the coatings was studied by electron microscopy and EDX-depth profiling. The behaviour of the coating/substrate system is discussed in comparison with “state-of-the-art” Zn-coatings produced by electrogalvanizing. Generally speaking the performance of the optimized coatings was as good as or better than the electrogalvanized standard.
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Schedule a callMore From: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
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