| Titre : |
REACH - A future without chromium dioxide |
| Type de document : |
texte imprimé |
| Auteurs : |
Daniel Glassner, Auteur |
| Année de publication : |
2021 |
| Article en page(s) : |
p. 36-39 |
| Langues : |
Anglais (eng) |
| Catégories : |
Chrome hexavalent -- Suppression ou remplacement
Dépôt électrolytique
Essais accélérés (technologie)
Essais de brouillard salin
Matières plastiques -- Revêtement
Polycarbonates
Terpolymère acrylonitrile butadiène styrène
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
The REACH regulation and the resulting ban on chromium trioxide presents the industry and the entire supply chain with major challenges. This article highlights alternative processes for hard chrome plating, etching plastic substrates, chromium electrolytes and chromium passivation which contain no hexavalent. |
| Note de contenu : |
- Obligation on manufacturers
- Etching process without chromium (VI) for ABS and ABS-PC plastics
- Bright chrome from a sulphate-based procedure
- Post-treatment without chromium (VI) for excellent corrosion resistance
- Hard chromium from trivalent chromium electrolytes
- Good wear resistance but increased crack formation
- Fig. 1 : Alongside the pre-treatment of plastic, another area particularly affected by the REACH regulation is chromium plating, including on metal substrates
- Fig. 2 : The chromium-free etch applies the same principle as the chromium (VI) variant and enables plastic components made from ABS and ABC-PC to be electroplated in existing machines without the need for an additional stage in the process
- Fig. 3 : Many of the decorative surfaces in the furniture, sanitary goods and automotive industries have a bright chrome coating
- Fig. 4 : Components after a 480-hour salt spray test as defined in ISO 9227 ; market standard, Tristar 330 AF, Tristar 330 AF plus Tristar Shield
- Fig. 5 : Oxide layer on a conventional coating with a trivalent chromium electrolyte and oxide layer on an extra-thick chromium oxide coating after a special coating sequence
- Fig. 6 : Recent studies of landing gear components showed that the cracking of the coating had no impact on the fatigue tests carried out in the aviation industry |
| Permalink : |
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in INTERNATIONAL SURFACE TECHNOLOGY (IST) > Vol. 14, N° 1 (2021) . - p. 36-39
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REACH - A future without chromium dioxide in INTERNATIONAL SURFACE TECHNOLOGY (IST), Vol. 14, N° 1 (2021)
