Sökning: "chromate"
Visar resultat 11 - 15 av 20 avhandlingar innehållade ordet chromate.
11. Alkali Induced Corrosion of 304L, The Influence of Potassium Salts and Water Vapour
Sammanfattning : This work investigates the influence of alkali salts on the oxidation of304-type (Fe18Cr10Ni) austenitic stainless steel in laboratory and fieldexposures. Stainless steel coupons were exposed isothermally inlaboratory furnaces at 400-600 °C in 5% O2 and 5% O2 + 40% H2O.Thermobalance exposures were also performed. LÄS MER
12. Investigations of Chlorine-Induced High Temperature Corrosion of Steels
Sammanfattning : The high corrosivity of the fireside environment in waste and biomass fired boilers is commonly attributed to the presence of chlorine-containing compounds. Chlorine-induced high temperature corrosion is not well understood, however. LÄS MER
13. Surface characterization of the chromium hydroxide and basic calcic deposition layers formed on the steel cathode in the chlorate production process
Sammanfattning : During technical service, the surface of the steel cathodein the chlorate production process changes with respect tochemical composition and morphology. Deposition of insolublespecies from the electrolyte and corrosion products from thebase metal accumulate and form surface layers that influencethe cathode activity with regards to hydrogen evolution, theprimary reaction, as well as to various parasitic reactions. LÄS MER
14. High Temperature Corrosion of FeCrAl Alloys: The influence of water vapour and alkali salt
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
15. High Temperature Oxidation and Chlorination of FeCrAl alloys
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