Corrosion of surface modified AISI 4340 steel in jatropha biodiesel
The aim of this paper is to study the effect of jatropha curcas biodiesel on the corrosion behavior of surface modified low alloy steel after modification by TIG torch surface melting technique. The coating layer was produced by preplacement of 1 mg/mm2 TiC particulate into the surface of AISI 43...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Trans Tech Publications, Switzerland
2015
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/42912/ http://irep.iium.edu.my/42912/ http://irep.iium.edu.my/42912/ http://irep.iium.edu.my/42912/1/42912_-_Corrosion_of_surface_modified_AISI_4340_steel_in_jatropha_biodiesel.pdf |
| Summary: | The aim of this paper is to study the effect of jatropha curcas biodiesel on the corrosion
behavior of surface modified low alloy steel after modification by TIG torch surface melting
technique. The coating layer was produced by preplacement of 1 mg/mm2 TiC particulate into the
surface of AISI 4340 steel and at heat input of 1344 J/mm using an electric arc generated from the
tungsten electrode that melt the powder with substrate material to form a composite layer. The
micrograph of the composite coated surface modified steel showed formation of TiC dendrites that
densely populated at the of the melt pool which contributes to the high hardness value. The
corrosion behavior of the composite coated steel was studied using tafel extrapolation method in
biodiesel environment. The surface micrograph after corrosion test shows pitting corrosion holes as
a dominant corrosion phenomenon for AISI 4340 steel. The tafel curve showed reduction of
corrosion current density of the surface modified steel compared to the alloy street substrate. |
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