EFFECT OF PLASTIC DEFORMATION AND WELDING ON CORROSION BEHAVIOUR OF 304 MATERIAL IN SIMULATED FLUE GAS DESULFURIZATION
Corrosion behavior of stainless steel 304 and its weldment welded under bending load in simulated flue gas desulfurization (50wt.% H2SO4, 2wt.% HCl, 1.5wt.% HNO3, and 0.2wt.% HF) at 60 °C investigated by combining immersion testing and surface analyses. Weld metal morphology and microstructural...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/68828 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Corrosion behavior of stainless steel 304 and its weldment welded under
bending load in simulated flue gas desulfurization (50wt.% H2SO4, 2wt.% HCl,
1.5wt.% HNO3, and 0.2wt.% HF) at 60 °C investigated by combining immersion
testing and surface analyses. Weld metal morphology and microstructural
characteristics of welds were investigated. Dendritic structures are found in the
weld metal. Corrosion evaluation was conducted by weight loss measurements and
metallographic observations to determine the type of corrosion attack. After the
corrosion test, the sample showed selective austenite/ferrite interface corrosion in
base metal and weld metal. The test results indicated pitting corrosion was the
dominant type of corrosion attack in the weld metal. Weight loss of the 304
materials in the simulation of the Flue Gas Desulfurization (FGD) environment is
getting higher. Plastic deformation will cause an increase in weight loss because a
potential difference is formed due to strain in the material. Variations in
microstructure due to welding can cause an increase in weight loss due to the
formation of a Cr depletion zone around the delta ferrite.
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