Sökning: "FeCrAl Alloys"

Visar resultat 1 - 5 av 25 avhandlingar innehållade orden FeCrAl Alloys.

  1. 1. High Temperature Oxidation and Chlorination of FeCrAl alloys

    Författare :Niklas Israelsson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; KCl; pre-oxidation; FeCrAl; H2O; high-temperature corrosion; kinetics;

    Sammanfattning : AbstractThe constant strive for improved efficiency and lower-cost industrial processes often results in progressively higher temperatures and more aggressive environments. High- temperature corrosion is a well-known problem in biomass- and waste-fired boilers and is one of the obstacles to overcome in achieving a more sustainable society. LÄS MER

  3. 2. Is water a crucial factor in the oxidation of FeCrAl alloys?

    Författare :Helena Josefsson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; alpha-Al203; oxidation kinetics; high temperatur corrosion; reactive elements; FeCrAl; vater vapour; transient alumina;

    Sammanfattning : FeCrAl alloys are much used at high temperatures because the formation of a dense and slow-growing alumina scale provides resistance towards oxidation and high temperature corrosion. While the FeCrAl alloys are primarily intended for temperatures above 950ºC, they are sometimes used at lower temperature, for example as supports in automotive catalysts. LÄS MER

  4. 3. Furnace Wall Corrosion in a Wood-fired Boiler

    Författare :Yousef Alipour; Pamela Henderson; Mikko Hupa; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; High Temperature Corrosion; Used-wood Fired Boilers; Furnace Wall Corrosion; Cl-induced Corrosion; 16Mo3; Nickel-based Alloys; FeCrAl Alloys; Fuel Additive; Sewage Sludge; >Thermodynamics Modelling; Högtemperaturkorrosion; Returträ Förbränningspannor; Eldstad Korrosion; klor-inducerad korrosion; 16Mo3; Nickelbaslegeringar; FeCrAl-legeringar; Bränsletillsatser; Avloppsslam; Termodynamik Modellering; Kemi; Chemistry;

    Sammanfattning : The use of renewable wood-based fuel has been increasing in the last few decades because it is said to be carbon neutral. However, wood-based fuel, and especially used wood (also known as recycled wood or waste wood), is more corrosive than virgin wood (forest fuel), because of higher amounts of chlorine and heavy metals. LÄS MER

  5. 4. High Temperature Corrosion of FeCrAl Alloys: The influence of water vapour and alkali salt

    Författare :Niklas Israelsson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; pre-oxidation; FeCrAl; kinetics; high temperature corrosion; KCl; water vapour; alumina; oxidation;

    Sammanfattning : The corrosive environment in biomass- and waste-fired boilers has been known for several years. The traditionally used FeCr and FeNiCr steels show limited performance in the aggressive environment that contains more H2O and alkali salts than traditional fuel. LÄS MER

  7. 5. Microstructure of Alumina (Al2O3) Grown by Oxidation of FeCrAl Alloys and by Chemical Vapour Deposition

    Författare :Sead Canovic; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; γ-Al2O3; TiN; κ-Al2O3; TiC; FeCrAl alloys; CVD; oxidation; α-Al2O3;

    Sammanfattning : This thesis consists of two parts: the detailed microstructure of (i) CVD alumina multilayer coatings, and (ii) alumina scales formed on three different FeCrAl alloys. The coatings and oxide scales were characterized by using analytical electron microscopy and different surface analysis techniques. LÄS MER