Sökning: "corrosion resistance"

Visar resultat 26 - 30 av 240 avhandlingar innehållade orden corrosion resistance.

  1. 26. Corrosion of current cullector materials in the molten carbonate fuel cell

    Författare :Baohua Zhu; KTH; []
    Nyckelord :molten carbonate fuel cell MCHC ; corrosion; current collecotr; contact corrosion reistance;

    Sammanfattning : The corrosion of current collector materials in MoltenCarbonate Fuel Cells (MCFC) is investigated. The essential aimsof this investigation were to study the corrosion behaviour ofdifferent materials, in varying cathode and anode MCFCenvironments, and to study the contact corrosion resistancesbetween the MCFC current collector and electrodes. LÄS MER

  3. 27. High temperature corrosion during waste incineration : characterisation, causes and prevention of chlorine-induced corrosion

    Författare :Peter Viklund; Christofer Leygraf; Jan Froitzheim; Staffan Hertzman; Sweden Stockholm Swerea KIMAB AB; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; high temperature corrosion; waste incineration; superheater tubing; steel; alkali; chlorine; suphur; Chemistry; Kemi;

    Sammanfattning : Waste-fired boilers suffer severely from corrosion of critical components such as superheater tubes. In this work the high temperature corrosion of candidate superheater alloys have been investigated by detailed laboratory studies and controlled field exposures in full-scale boilers. LÄS MER

  4. 28. Use of local electrochemical techniques for corrosion studies of stainless steels

    Författare :Nuria Fuertes; Rachel Pettersson; Mari Sparr; Ulf Kivisäkk; Yolanda Hedberg; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Stainless steel; passive film; thermal oxides; work function; pickling; SKPFM; SVET; XPS; AES; Teknisk materialvetenskap; Materials Science and Engineering;

    Sammanfattning : The excellent corrosion resistance of stainless steels arises from the presence of a passive film on its surface. Above 10.5wt% Cr a chromium oxide of 1-3 nm is formed on the surface of the metal that in case of damage will reform and hinder further dissolution of the metal. LÄS MER

  5. 29. Non-metallic inclusions in pipeline steels and their effect on the corrosion resistance

    Författare :Elena Sidorova; Andrey Karasev; Pär Jönsson; Lauri Holappa; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; pipeline steels; Ca-treatment; non-metallic inclusions; electrolytic extraction; corrosion; chemical extraction; Teknisk materialvetenskap; Materials Science and Engineering;

    Sammanfattning :  This thesis focus on investigations of the influence of non-metallic inclusions on corrosion in steel samples taken at different stages of the steel production when producing pipeline steels. The electrolytic extraction technique was used to extract inclusions from these steel samples and thereafter studying them using scanning electron microscopy in combination with energy dispersive microscopy. LÄS MER

  7. 30. Study of Electrochemical Behaviour and Corrosion Resistance of Materials for Pacemaker Lead Applications

    Författare :Andreas Örnberg; Jinshan Pan; Jukka Lausmaa; Ann Cornell; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Co-base alloy; 35N LT; MP35N; Ta; TiN coating; electrochemical behaviour; corrosion resistance; Chemistry; Kemi;

    Sammanfattning : For patients suffering bradycardia, i.e., too slow heart rhythm, the common treatment is having a pacemaker implanted. The pacemaker system consists of the pacemaker and a pacing lead. LÄS MER