Evonik Degussa Gmbh

Jasmin Nitsche

Harald Haeger

Markus Hartmann

Franz-Erich Baumann

Juergen Franosch

Reinhard Beuth

Klaus Gahlmann

Harald Häger

Rainer Göring

Jan Berger

Mario Resing

Sebastian Geerkens

Michael Böer

A moulding composition contains at least 40 wt % of components a) and b). Based on the sum of components a) and b), there are 60-99 wt % of component a) and 40-1 wt % of component b). Component a) is a partially aromatic copolyamide containing, as polymerized monomer units, 30-90 mol % of a combination of hexamethylenediamine and terephthalic acid and 70-10 mol % of a combination of hexamethylenediamine and a linear aliphatic dicarboxylic acid having 8-19 C atoms. Component b) is an olefinic copolymer containing, as polymerized monomer units, i) 35-94.9 wt % of ethene-based monomer units, ii) 5-65 wt % of monomer units based on a 1-alkene having 4-8 C atoms, iii) 0-10 wt % of monomer units based on an olefin different from i) and ii), and iv) 0.1-2.5 wt % of monomer units based on an aliphatically unsaturated dicarboxylic acid anhydride, where the sum of wt % of i), ii), iii) and iv) is 100%.

Moulding compound based on a partially aromatic copolyamide

A method for coating of a metallic article is provided. According to the method, the metal surface is coated with a composition which comprises a polymer or comprises a two-component system that reacts to form a polymer following application to the metal surface. The composition comprises 70-2700 meq/kg olefinic double bonds which leads to stronger adhesion and to increased corrosion resistance.

Coated metallic article

A corrosion protected metal pipe for installation in an offshore structure or for producing a pipeline laid in water is provided. The metal pipe has an at least two-layer covering on the pipe with a lower layer facing the pipe and an upper layer on a side of the lower layer not facing the pipe is provided. The layers are formed such that the lower layer is electrically conductive and the upper layer is electrically insulating, the lower layer is optically contrasting to the upper layer, or the lower layer is electrically conducting and optically contrasting to the upper layer and the upper layer is electrically insulating. Thus, in the event of damage to the layer or layers lying above, a visual or electrical signal can be detected. Damage to the corrosion protection covering can therefore be detected easily and, if appropriate, reported by remote monitoring.

Wear indicator system for offshore corrosion protection covering systems

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Dortmund, Germany

Jasmin Nitsche