Effect of Rare Earth Elements on Corrosion Behavior of Low Carbon Steel in CSP

2011 ◽  
Vol 311-313 ◽  
pp. 835-840
Author(s):  
Tao Li ◽  
Meng Qin ◽  
Zi Li Jin ◽  
Hui Ping Ren
Keyword(s):  
Rare Earth ◽  
Carbon Steel ◽  
Rare Earth Elements ◽  
Corrosion Current Density ◽  
Low Carbon Steel ◽  
Corrosion Current ◽  
Low Carbon ◽  
Compact Strip Production ◽  
Re Elements ◽  
Strip Production

Effects of rare earth elements (RE) on modification of inclusions, the corrosion dynamic laws and the electrochemical properties of low carbon steel in Compact strip production (CSP) technology have been investigated with SEM, EDS and polarization curve measurements. The results show that the RE elements play an important role on the morphology and type control of inclusions and also reduce their size in low carbon steel. The corrosion is mitigated due to relatively compact corrosion products and the dispersion spherical RE oxides and/or oxy-sulfides inclusions with the addition of RE. Meanwhile, the electrochemical measurements show that the corrosion current density of low carbon steel with RE is lower than that of steel without RE. The corrosion resistance is improved to a certain extent by RE.

Effect of Rare Earth on Microstructure and Impact Toughness of Low Carbon Steel Based on Compact Strip Production Process

2011 ◽  
Vol 189-193 ◽  
pp. 1753-1756 ◽  
Author(s):  
Hai Yan Wang ◽  
Hui Ping Ren ◽  
Zi Li Jin ◽  
Cui Zong
Keyword(s):  
Rare Earth ◽  
Carbon Steel ◽  
Impact Toughness ◽  
Acicular Ferrite ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
Compact Strip Production ◽  
Hot Rolled ◽  
Strip Production

The effect of rare earth (RE) on microstructure and impact toughness of hot rolled low carbon structure steel based on the Compact strip production (CSP) process was investigated in this work. Scan electron microscope (SEM) were employed to characterize the microstructure and analyze the fracture surface. Moreover, hot compression experiments were also adopted on the Gleeble-1500 hot simulator as well. The results indicate that acicular ferrite and/or ultrafine ferrite morphologies can be induced when an appropriate amount of rare earth added into the low carbon steel, which possessed the satisfied strength and toughness behaviors. Compared with commercial low carbon structural steels, the additions of RE can improve dynamic recrystallization critical strain of low carbon structural steel as well. In addition, the role of RE on the formation of these acicular ferrite morphologies has been investigated.

scholarly journals A Study Of Corrosion Inhibition Of Low Carbon Steel In Washing Water Of Crude Oil Solution In The Presence Of Folic Acid

2014 ◽  
Vol 11 (3) ◽  
pp. 1171-1179
Author(s):  
Baghdad Science Journal
Keyword(s):  
Folic Acid ◽  
Carbon Steel ◽  
Crude Oil ◽  
Current Density ◽  
Corrosion Current Density ◽  
Low Carbon Steel ◽  
Corrosion Current ◽  
Low Carbon ◽  
Increasing Temperature ◽  
Washing Water

The corrosion behavior of low carbon steel in washing water of crude oil solution has been studied potentiostatically at five temperatures in the range (30–70)°C .The corrosion potential shifted to more negative values with increasing temperature and the corrosion current density increased with increasing temperature. Folic acid had on inhibiting effect on the corrosion of low carbon steel in washing water at a concentration (5× 10-4-- 5× 10-3 ) mol/dm3 over the temperature range (30–70)°C. Values of the protection efficiency were calculated from the corrosion current density .From the general results for this study, it can be seen that thermodynamic and kinetic function were also calculated (?G, ?S, ?H and Ea ) to comparison these values in presence and absence of inhibitor (folic acid ).

scholarly journals A Study Of Corrosion Behavior Of Low Carbon Steel In Acidic And Basic Washing Water Of Crude Oil Solution At Different Temperatures

2014 ◽  
Vol 11 (4) ◽  
pp. 1510-1518
Author(s):  
Baghdad Science Journal
Keyword(s):  
Carbon Steel ◽  
Crude Oil ◽  
Current Density ◽  
Corrosion Current Density ◽  
Corrosion Potential ◽  
Low Carbon Steel ◽  
Corrosion Current ◽  
Low Carbon ◽  
Increasing Temperature ◽  
Washing Water

The corrosion behavior of low carbon steel in washing water of crude oil solution has been studied potentiostatically at five temperatures in the range ( 303 –343 )K, at pH ( 4 ) and at pH (4,6,7,9,11 ) at (343K)..The corrosion potential shifted to more negative values with increasing temperature and the corrosion current density increased with increasing temperature, the corrosion current density (icorr) decreased with increasing pH in the rang ( 4 – 7 ) and it increased with increasing pH in the rang ( 9 – 11 ) at ( 343 K ), while the corrosion potential generally variation with increasing pH in the rang (4-11)at(343K. From the general results for this study can be seen that thermodynamic and kinetic function were also calculated (?G, ?S, ?H and Ea )

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