Sökning: "zinc coating"

Visar resultat 16 - 20 av 20 uppsatser innehållade orden zinc coating.

  1. 16. Fabrication and Optical Properties of ZnO Nanocrystal/GaN Quantum Well Based Hybrid Structures

    Master-uppsats, Tunnfilmsfysik; Tekniska högskolan

    Författare :Kuo Chieh-Yi; [2012]
    Nyckelord :ZnO; GaN; Hybrid Structure;

    Sammanfattning : Optical properties of hybrid structures based on zinc oxide nanocrystals (NCs) and Gallium Nitride quantum well (QW) has been studied. The ZnO NCs thin films on the top of GaN QW structures were fabricated using spin coating. The surface morphology was characterized by scanning electron microscopy (SEM). LÄS MER

  3. 17. Evaluation of corrosion in crevices where materials with different surface coatings are combined

    Uppsats för yrkesexamina på avancerad nivå, Institutionen för kemi - Ångström

    Författare :Ida Siggelkow; [2011]
    Nyckelord :;

    Sammanfattning : In modern-day automobile industries the predominant type of corrosion is crevicecorrosion located on door hem flanges and fasteners. Today these areas areprotected by anti-corrosive agents. The appliance of these anti-corrosive agents is acostly process and could be excluded if a more corrosion resistant surface coatingwere to be used. LÄS MER

  4. 18. Evaluation of corrosion in crevices in screw joints

    Master-uppsats, KTH/Korrosionslära

    Författare :Philip Björlenstam; [2011]
    Nyckelord :Cervice corrosion; Screw joints; Corrosion protection; Atmospheric corrosion; GEOMET;

    Sammanfattning : In this Master of Science thesis screws with different coatings were exposed to an accelerated corrosion test in order to investigate the corrosion development. The test matrix constituted of hexagonal and flange screws (fastened on frames) coated with either zinc/iron (ZnFe) or a flake system of aluminum and zinc (GEOMET). LÄS MER

  5. 19. Miljöeffekter vid ändrad ytbehandling på ITT Water & Wastewater

    Kandidat-uppsats, Naturvetenskapliga institutionen

    Författare :Klara Beckeman; [2008]
    Nyckelord :ytbehandling; miljöeffekt;

    Sammanfattning : ITT Water & Wastewater (före detta ITT Flygt) tittar på att eventuellt genomföra en förbättring av ytbehandlingen av deras pumpar för att eliminera de rostangrepp pumparna utsätts för idag. Examensarbetets uppgift är här att analysera och beskriva miljöeffekterna av de nya ytbehandlingsmetoderna som företaget undersöker. LÄS MER

  7. 20. Release rates and environmental impact of zinc-nickel coatings in the automotive industry

    Uppsats för yrkesexamina på grundnivå, KTH/Materialvetenskap

    Författare :Johan Åslund; [2006]
    Nyckelord :automotive corrosion; metal release; nickel; zinc; zinc-nickel coatings; Cr VI free; surface treatment;

    Sammanfattning : At present the automotive industry is due to an EU directive, replacing hexavalent chrome on vehicles. This is an extensive job as hexavalent chrome is used all over the vehicle and to large extent on fasteners (screws, nuts, rivets etc.). Chrome (VI) is used as a passivating layer on mainly zinc-iron. LÄS MER