Aluminum slurry coatings to replace cadmium for aeronautic applications
| Autor: | Marcos Gutiérrez, M.C Garcı́a, S. Ulargui, J. García de Blas, L. Madueño, Alina Agüero, J. C. del Hoyo |
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| Rok vydání: | 2012 |
| Předmět: |
Materials science
020209 energy chemistry.chemical_element 02 engineering and technology engineering.material Corrosion Aeronáutica Lubricity Coating Aluminium 0202 electrical engineering electronic engineering information engineering Materials Chemistry Embrittlement Cadmium Materiales Metallurgy Surfaces and Interfaces General Chemistry Química 021001 nanoscience & nanotechnology Condensed Matter Physics Surfaces Coatings and Films Galvanic corrosion chemistry Slurry engineering 0210 nano-technology |
| Zdroj: | Surface and Coatings Technology, ISSN 0257-8972, 2012-12, Vol. 213 Archivo Digital UPM Universidad Politécnica de Madrid |
| Popis: | Cadmium has been widely used as a coating to provide protection against galvanic corrosion for steels and for its natural lubricity on threaded applications. However, it is a toxic metal and a known carcinogenic agent, which is plated from an aqueous bath containing cyanide salts. For these reasons, the use of cadmium has been banned in Europe for most industrial applications. However, the aerospace industry is still exempt due to the stringent technical and safety requirements associated with aeronautical applications, as an acceptable replacement is yet to be found. Al slurry coatings have been developed as an alternative to replace cadmium coatings. The coatings were deposited on AISI 4340 steel and have been characterized by optical and electron microscopy. Testing included salt fog corrosion exposure, fluid corrosion exposure (immersion), humidity resistance, coating-substrate and paint-coating adhesion, electric conductivity, galvanic corrosion, embrittlement and fatigue. The results indicated that Al slurry coatings are an excellent alternative for Cd replacement. |
| Databáze: | OpenAIRE |
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