Effect of Decarburization Heat Treatment and Chromium Addition on Corrosion Behavior of Carbon Steel

CORROSION ◽  
2009 ◽  
Vol 65 (5) ◽  
pp. 326-331 ◽  
Author(s):  
H. S. Shin ◽  
S. W. Kim ◽  
H-P. Kim ◽  
J. K. Park
Keyword(s):  
Heat Treatment ◽  
Carbon Steel ◽  
Corrosion Behavior ◽  
Chromium Addition

scholarly journals To Investigate the Effect of Heat Treatment on Low Carbon Steel Corrosion Behavior

2018 ◽  
Vol 7 (3.20) ◽  
pp. 412
Author(s):  
Azhar Wahab Abdalrhem ◽  
Ali Jaber Naeemah ◽  
Makki Noori jawad
Keyword(s):  
Heat Treatment ◽  
Carbon Steel ◽  
Corrosion Rate ◽  
Corrosion Behavior ◽  
Low Carbon Steel ◽  
Steel Corrosion ◽  
Optical Microscope ◽  
Polarization Measurement ◽  
Material Surface ◽  
Low Carbon

This work was to investigating the corrosion behavior of low carbon steel in a salt solution of 3.5wt% NaCl after undergoing two different types of heat treatment at 960 ºC in a furnace. The material of low carbon steel was cut into nine small pieces under three groups A, B and C, without heated annealing and hardening heat treatment respectively. The heat treatment was at temperature 960ºC. The hardness of the sample as received will be 203 kg/mm2 while after hardening the hardness was increased. The sample was mounted using hot and cold mounting. The microstructure and surface morphology was observed by using Scanning Electron Microscope (SEM) and Optical Microscope (OM) after grinding, polishing and etching on the sample. In group A cementite can be observed clearly on pearlite on the surface before corrosion test. After four days soaking in 3.5 wt% NaCl solution was observed all cementite and pearlite will be transformed to austenite with the remnants of cementite make the surface unstable hence increases the initial corrosion. After four days soaking when the cementite is oxidized and a thick film of corrosion product covers the material surface. The formation of Martensite due to quenching and rapid cooling in group C sample increases the corrosion rate from 0.072 mpy to 0.302 due to decreased of corrosion potential from -572 mV to -639 mV after four days soaking. The corrosion rate of each sample was measured by using electrochemical polarization measurement and Tafel extrapolation technique. From previous result, it was observed that samples which had undergone annealing mode of heat treatment turned out to be the ones with the best corrosion resistance.  

INFLUENCE THE QUENCHING AND TEMPERING ON THE MICROSTRUCTURE, MECHANICAL PROPERTIES AND SURFACE ROUGHNESS, OF MEDIUM CARBON STEEL

2018 ◽  
Vol 18 (1) ◽  
pp. 125-135
Author(s):  
Sattar H A Alfatlawi
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Surface Roughness ◽  
Carbon Steel ◽  
Cold Water ◽  
Medium Carbon Steel ◽  
Medium Carbon ◽  
Heating And Cooling ◽  
Treatment Processes ◽  
Quenching And Tempering

One of ways to improve properties of materials without changing the product shape toobtain the desired engineering applications is heating and cooling under effect of controlledsequence of heat treatment. The main aim of this study was to investigate the effect ofheating and cooling on the surface roughness, microstructure and some selected propertiessuch as the hardness and impact strength of Medium Carbon Steel which treated at differenttypes of heat treatment processes. Heat treatment achieved in this work was respectively,heating, quenching and tempering. The specimens were heated to 850°C and left for 45minutes inside the furnace as a holding time at that temperature, then quenching process wasperformed in four types of quenching media (still air, cold water (2°C), oil and polymersolution), respectively. Thereafter, the samples were tempered at 200°C, 400°C, and 600°Cwith one hour as a soaking time for each temperature, then were all cooled by still air. Whenthe heat treatment process was completed, the surface roughness, hardness, impact strengthand microstructure tests were performed. The results showed a change and clearimprovement of surface roughness, mechanical properties and microstructure afterquenching was achieved, as well as the change that took place due to the increasingtoughness and ductility by reducing of brittleness of samples.

Corrosion Behavior of The Weld Zone of Carbon Steel Overpack for HLW Geological Disposal

2008 ◽  
Author(s):  
Yutaka Yokoyama ◽  
Rieko Takahashi ◽  
Hidekazu Asano ◽  
Naoki Taniguchi ◽  
Morimasa Naito
Keyword(s):  
Carbon Steel ◽  
Corrosion Behavior ◽  
Weld Zone ◽  
Geological Disposal
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