Hot Corrosion of Fe-Cr Alloys with 75 Na2SO4 + 25 NaCl Coating at 1173 K
-
Guangyan Fu
and
Xiao Wang
Abstract
Hot corrosion behavior of two Fe-Cr alloys coated with the salt film of 25 NaCl + 75 Na2SO4 (mass fraction) in air at 1173 K was studied. Results show that for both alloys of Fe-10Cr and Fe-20Cr, the mass gain of the alloy coated with 40–45 g/m2 of 75 Na2SO4 + 25 NaCl is greater than that of the alloy coated with 20–25 g/m2 of the film with the same composition. The corrosion products of Fe-10Cr alloy can be divided into three layers, of which the outermost scale is Fe2O3, the intermediate layer is mixed oxides of Fe2O3 and Cr2O3, and the innermost layer is mainly chromium sulfide. However, the corrosion products of Fe-20Cr only consist of two layers: the external scale of Fe2O3 and Cr2O3, and the internal layer of chromium sulfide. Compared to Fe-10Cr, Fe-20Cr has better hot corrosion resistance. The hot corrosion mechanism was proposed and the influence of the different coating mass of 75 Na2SO4 + 25 NaCl is also discussed.
©[2012] by Walter de Gruyter Berlin Boston
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Articles in the same Issue
- Masthead
- High Temperature Tensile Properties of Equal Channel Angular Pressed Al-Zn-Mg-Cu Alloy
- Hard Finish Turning Parameters Optimization for Machining of High Temperature Stainless Steel
- High Cycle Fatigue and Cyclic Plastic Deformation Behaviour of High Temperature Oxidation Resistant Titanium Aluminide Coated IMI 834 Alloy at 873 K
- Microstructural and Mechanical Properties of Er2O3-ZrO2 Ceramics with Different Er2O3 Contents
- Synthesis of Different Morphologies of PbS Nanostructures via Hydrothermal Process
- Facile Hydrothermal Synthesis of CoSO4ċH2O Nanoparticles and Barite Microcubes from Novel Precursors
- Hot Corrosion of Fe-Cr Alloys with 75 Na2SO4 + 25 NaCl Coating at 1173 K
- A Simple Method for Synthesis of PbS Nanoparticles Using 2-Mercaptoethanol as the Capping Agent
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- Calculation of the Raman Linewidths of Lattice Modes Close to the α-β Transition in Quartz
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