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Der EMS-Dienstleister Lacroix beschichtet in seinem deutschen Werk elektronische Baugruppen seit Jahresbeginn mit einer neuen vollautomatischen Coating-Anlage. Das abschließende Auftragen von Schutzschichten ist für den Einsatz empfindlicher Baugruppen unter widrigen Umweltbedingungen unerlässlich, um die Funktion der Baugruppe auch dort zu gewährleisten. Besonders bei sehr kleinen und dicht bestückten Baugruppen muss in der Serienfertigung auf eine zuverlässige Abdeckung bestimmter Bereiche mit der Schutzschicht geachtet werden, denn die Abstände der Bauteile und Lötstellen können kleiner als 1 mm sein.

Vom 28. bis 30. März 2023 trifft sich die Coatings-Welt wieder zur European Coatings Show im Messezentrum Nürnberg. Endlich wird die Fachmesse wieder zur Plattform für Branchenteilnehmer, für die das Knüpfen neuer Geschäftskontakte, persönliche Begegnungen und Networking unersetzlich sind. Ob Lacke, Druckfarben, Labor-, Produktions-, Prüf- oder Messtechnik, Klebstoffe oder bauchemischen Materialien – Fachbesucher dürfen sich auf spezialisierte Anbieter aus aller Welt und ein sehr umfangreiches Angebotsspektrum freuen. Die teilparallele European Coatings Show Conference bietet mit über 140 Präsentationen am 27. und 28. März Raum für den intensiven Wissenstransfer. Pre-Conference-Tutorials bereiten auf die Konferenz vor.

During component coating already deposited particles are incorporated into the growing layer and continuously deposited on the surface. There a characteristic defect growth structure is formed, which is reflected in a particle surface as well as a roughness. In this work, it is shown that the production of doped carbon films using composite cathodes leads to a significant reduction in arc-induced particle emission. While Part 1 covered origins of growth defects, methods of surface characterization, experimental setups and measurement methods, the final part of the article delivers the measurement results and highlights the conclusions.

What awaits you in this article: Hybrid Zn-Mn(11 wt.%) alloy coatings containing in their matrix stabilized polymeric micelles (SPM) are electrodeposited from a sulfate bath. SPM are added to the electrolytic bath in concentrations of 0.1 or 0.3 wt.%, respectively. The coatings are additionally treated in Cr(III)-based solutions for obtaining of surface conversion layers (CL) aiming at receiving of better corrosion resistance. Surface morphology of the hybrid coatings (with or without additional conversion layer) is presented by SEM. The protective characteristics are evaluated with potentiodynamic polarization (PD) and polarization resistance (Rp) measurements in a model corrosion medium of 3% NaCl solution. Experimental results demonstrate the better corrosion resistance and the greater protective ability of the hybrid coatings obtained from electrolyte with 0.1 wt.% SPM, compared to the ordinary Zn-Mn alloy.

Coatings comprising carbon nanotubes (CNT) are super black, that is, characterized by uniformly low reflectance over a broad range of wavelengths from the visible to far infrared [1, 2]. This is attributable to the intrinsic properties as well as the morphology (density, thickness, disorder, and tube size) of graphitic material.

Plasma electrolytic oxidation also known as micro arc oxidation (MAO) or spark anodization is a relatively new surface modification technique. The process is used for growing thick, and hard oxide coating on light metals and alloys such as Al, Mg, Ti [1-5]. In principle, the process is similar to anodizing but involves the use of higher voltages and is carried out with mild aqueous alkaline electrolytes [6–17]. In this process, plasma discharge occurs which leads to partial fusion of an oxide film and consequently formation of an extremely adhesive oxide coating on the substrate [18].

Electroless Ni-P coating with subsequent oxidization is a well-established technique for ultra-high absorptance black finish [1–4], although the darkest man-made surfaces are made of carbon nanotubes (CNTs) [5]. The robust surface of the black Ni-P coating is preferable for minimising the risk of accidentally damaging the dimensionally critical baffles of large size. On the contrary the CNT forest is quite fragile. The black electroless nickel has outstanding mechanical properties and stability against sunlight exposure in humid as well as extreme space conditions.

Nickel and cobalt are silver-white elements. Nickel has been widely used in coins, manufacturing of certain alloys that retain a high silvery polish, such as German silver. Nickel is slowly oxidized by air at room temperature and is considered corrosion-resistant. Historically, it has been used for plating iron, copper, bronze, and brass etc. About 9 % of world nickel production is still used for corrosion-resistant nickel plating. Nickel-plated objects sometimes provoke nickel allergy.

Zusammen mit Vincentz Network, dem international renommierten Anbieter von Informations- und Netzwerk-Services für die Lackindustrie, schafft die NürnbergMesse zwei neue Pflichttermine für die Farben- und Lackindustrie im Asien-Pazifik-Raum und im Nahen Osten. Vom 21. bis 23. September 2022 initiieren die beiden Partner erstmals die Pacific Coatings Show im Kongresscenter Jakarta International Expo in Indonesien. In den Vereinigten Arabischen Emiraten veranstaltet die NürnbergMesse gemeinsam mit Vincentz Network vom 16. bis 18. Oktober 2022 die Gulf Coatings Show im Expo Centre Sharjah. Beide Fachmessen finden künftig zweijährig statt.

Chromium is a steely-gray, lustrous, hard metal that takes a high polish and has a high melting point. While chromium metal and Cr(III) ions are not considered toxic, hexavalent chromium, Cr(VI), is both toxic and carcinogenic. 85 % of the available chromium is used in metal alloys. The remainder is used in the chemical, refractory, and foundry industries. Chromium compounds are used in leather products, dyes, paints, cement, mortar and are anti-corrosives. Chromium salts (chromates) are allergic to some people. Chrome ulcers are often found in workers that have been exposed to strong chromate solutions in electroplating, tanning and chrome-producing manufacturers [1, 2]