Sökning: "Chromate"

Visar resultat 1 - 5 av 18 avhandlingar innehållade ordet Chromate.

  1. 1. Alkali Induced High Temperature Corrosion of Stainless Steel - Experiences from Laboratory and Field

    Detta är en avhandling från Chalmers University of Technology

    Författare :Jesper Pettersson; Chalmers tekniska högskola.; Chalmers University of Technology.; [2008]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Fasta tillståndets kemi; Solid state chemistry; Materialkemi; Materials chemistry; KCl; Chromate; Chlorine; Corrosion; 304L; Deposit; Biomass; Waste;

    Sammanfattning : The high temperature corrosion of steam superheaters is a major obstacle that has to be overcome in order to increase the electricity generating efficiency of power boilers burning biomass or waste. This thesis addresses this issue by a combination of well-controlled model experiments in the laboratory and short and long term field exposures using cooled probes in full-scale biomass and waste fired boilers. LÄS MER

  2. 2. Critical potential and oxygen evolution of the chlorate anode

    Detta är en avhandling från Stockholm : KTH

    Författare :Linda Nylén; KTH.; [2006]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; chlorate; chloride oxidation; oxygen evolution; critical anode potential; chromate; DSA; mass transport; RDE; TECHNOLOGY Chemical engineering; TEKNIKVETENSKAP Kemiteknik;

    Sammanfattning : In the chlorate process, natural convection arises thanks to the hydrogen evolving cathode. This increases the mass transport of the different species in the chlorate electrolyte. There is a strong connection between mass transport and the kinetics of the electrode reactions. LÄS MER

  3. 3. Influence of the electrolyte on the electrode reactions in the chlorate process

    Detta är en avhandling från Stockholm : KTH

    Författare :Linda Nylén; KTH.; [2008]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chlorate; chloride oxidation; critical anode potential; chromate; DSA; hydrogen evolution; iron; mass transport; oxygen evolution; REM; RDE; steel; NATURAL SCIENCES Chemistry Analytical chemistry Electrochemistry; NATURVETENSKAP Kemi Analytisk kemi Elektrokemi;

    Sammanfattning : The chlorate process is very energy intensive and a major part of the production costs are for electrical energy. Since the electricity prices are constantly increasing and may also vary periodically, the chlorate plants may be forced to adjust their production rate to the price at each moment in order to minimise their costs. LÄS MER

  4. 4. Deposit Induced Corrosion in Biofuel Combustion

    Detta är en avhandling från Chalmers University of Technology

    Författare :Petter Andersson; Chalmers tekniska högskola.; Chalmers University of Technology.; [2004]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Teknisk materialvetenskap; Materials science; biofuel boiler; waste boiler; CFB; waste combustion; superheater; waterwall; high temperature corrosion; deposit induced corrosion; alkali chloride; chromate; ferritic steel; martensitic steel; austenitic steel; nickel-based alloy;

    Sammanfattning : Deposit induced corrosion is one of the main mechanisms for attack on heat exchangers in biofuel boilers. This severe corrosion decreases the obtainable steam temperature in boilers, thereby the efficiency in production of electricity is reduced. Deposit formation from the gas on superheater tubes are is generally referred to as fouling. LÄS MER

  5. 5. Activated Cathodes for the Hydrogen Evolution Reaction in Chlorate Manufacture

    Detta är en avhandling från Stockholm : KTH

    Författare :Ann Cornell; KTH.; [1993]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; chlorate; cathode; ruthenium dioxide; chromate;

    Sammanfattning : .... LÄS MER