scholarly journals The effect of time variation on the steels corrosion rate in 0.5 M H2SO4 solution

Author(s):  
Afira Ainur Rosidah ◽  
Vuri Ayu Setyowati ◽  
Suheni Suheni ◽  
Rafly Rijayanto

Previous researches have carried out studying the corrosion behavior of steels, the most frequently used steels are medium carbon steel, alloy steel, and stainless steel. This is due to their wide range of applications. So, corrosion behavior is necessary to be analyzed for every steel type because of its wide function. This study was aimed to analyze the corrosion rate, macrostructure, and the XRD results of the AISI 1045, AISI 4140, and SS 304 which represent every steel type. Then, the steels were exposed to the 0.5M H2SO4 solution with various corrosion times. The variation of the corrosion time was 48, 96, and 144 hours. The results of this study revealed that AISI 1045 showed the highest corrosion rate with the value of 183.7 mpy at 144 hours of the time variation. All specimens obtained an increase in the corrosion rate with the increase in the corrosion time. Furthermore, for the macrostructure results, AISI 1045 and AISI 4140 gave obvious rust on the surface of the specimens for all time variation. The corrosion spots appear in the time variation of 96 and 144 hours for SS 304 specimens. XRD analysis confirmed the presence of metal oxides as corrosion products.

2013 ◽  
Vol 438-439 ◽  
pp. 353-356
Author(s):  
Ping Li ◽  
Ying Wang

The corrosion behavior of rebar HRB400 in 0.5 wt.%, 1.5 wt.% and 3.5 wt.% NaCl solutions was investigated by corrosion rate calculation and corrosion morphology observation. The results showed that, with the increase of corrosion time from 240h to 720h, the corrosion rate of rebar HRB400 in each NaCl solution increases. With the increase of NaCl solution concentration, the corrosion rate of rebar HRB400 increases. The corrosion morphologies show strong consistency with the test results of corrosion rate.


2014 ◽  
Vol 908 ◽  
pp. 115-118
Author(s):  
Ping Li ◽  
Ying Wang

The corrosion behavior of rebar HRB400 in 1.5 wt.% NaCl solution was studied, and the mechanical properties before and after corrosion were tested. The results showed that, with the increase of corrosion time from 240h to 720h, the corrosion rate of rebar HRB400 increases and the corrosion becomes heavier. Meanwhile, the yield strength and tensile strength decrease, but the elongation decreases at first and then increases.


2012 ◽  
Vol 512-515 ◽  
pp. 509-512 ◽  
Author(s):  
Long Huang ◽  
Shan Shan Luo ◽  
Wen Kui Li

Al2O3 materials were used in a very wide range due to its good mechanical properties and relative low manufacture cost. The corrosion resistance of Al2O3 materials in acid, alkaline and sea water solutions gained more and more attention because many application situations are severe and the working life is shorten due to the corrosion. In this paper, the corrosion behavior of Al2O3 based materials in acid and alkaline solutions was studied and effect of corrosion time on the corrosion behavior of Al2O3 materials was investigated. The microstructure of as prepared Al2O3 materials was characterized by SEM. Possible corrosion process and mechanism was discussed in details. The results reveal that the as prepared Al2O3 materials show better corrosion resistance in alkaline solution than in acid solutions. In both acid and alkaline conditions, the corrosion mainly occurs in the grain boundary. Mass loss increased with increasing corrosion time, while the corrosion rate was decreased.


2012 ◽  
Vol 214 ◽  
pp. 272-275
Author(s):  
Ying Wang ◽  
Ying Wang

The corrosion behavior of reinforcing bar HRB400 in simulated concrete pore solution (3.5 wt. % NaCl solution) was studied, and the tensile mechanical properties after corrosion were tested. The results showed that, with corrosion time increasing from 240h to 720h, the corrosion rate of reinforcing bar HRB400 increases. With the increase of corrosion time (corrosion rate), the yield strength and tensile strength decrease, but the elongation decreases at first and then increases.


CORROSION ◽  
2010 ◽  
Vol 66 (11) ◽  
pp. 116002-116002-4 ◽  
Author(s):  
H.-G. Kim ◽  
H. J. Jang

Abstract The corrosion behavior of amorphous Co69Fe4.5Cr1.5Si10B15 alloy ribbon was investigated using potentiodynamic polarization tests in 0.001 M sulfuric acid (H2SO4) solution, 0.01 M ∼ 0.09 M sodium chloride (NaCl) solution, and solutions at pH levels from 3 to 13 made by mixing hydrochloric acid (HCl) and sodium hydroxide (NaOH). The corrosion potential decreased and the corrosion rate increased with an increase in solution temperature. The influence of solution temperature was more significant in H2SO4 solution than in NaCl solution. The amorphous Co69Fe4.5Cr1.5Si10B15 alloy ribbon showed passivity in solution with a pH higher than 7, and the corrosion rate was minimized at a pH of 9.


Metals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1471
Author(s):  
Yuhong Yao ◽  
Yaohua Jin ◽  
Wei Gao ◽  
Xiaoyu Liang ◽  
Jian Chen ◽  
...  

AlCoCrFeNiZrx (x = 0, 0.1, 0.2, 0.3, and 0.5) high-entropy alloys (HEAs) were prepared by a non-consumable vacuum arc melting technology, and the microstructure and corrosion behavior were investigated by XRD, SEM, immersion tests, and electrochemical measurements. The results indicate that galvanic corrosion of the AlCoCrFeNiZrx alloys occurred in 0.5 M H2SO4 solution, and only 0.1 mol of the added Zr could greatly improve the corrosion resistance of the alloys. The corrosion properties of the AlCoCrFeNiZrx HEAs had similar change tendencies with the increase in the Zr content in the immersion tests, potentiodynamic polarization measurements, and electrochemical impedance analysis, that is, the corrosion resistance of the AlCoCrFeNiZrx alloys in a 0.5 M H2SO4 solution first increased and then decreased with the increase in the Zr content. The Zr0.1 alloys were found to have the best selective corrosion and general corrosion resistance with the smallest corrosion rate, whereas the Zr0.3 alloys presented the worst selective corrosion and general corrosion resistance with the highest corrosion rate from both the immersion tests and the potentiodynamic polarization measurements.


2012 ◽  
Vol 450-451 ◽  
pp. 201-204 ◽  
Author(s):  
Ying Wang ◽  
Ying Wang

The corrosion behavior of reinforcing bar HPB235 in simulated concrete pore solution (3.5 wt.% NaCl solution) was investigated, and the tensile mechanical properties before and after corrosion were tested. The results showed that, with corrosion time increasing from 240h to 720h, the corrosion rate increases and the corrosion becomes heavier. With the increase of corrosion time (corrosion rate), the yield strength and tensile strength decrease, but the elongation decreases at first and then increases.


2012 ◽  
Vol 204-208 ◽  
pp. 3805-3808
Author(s):  
Ying Wang ◽  
Li Ping

The corrosion behavior of reinforcing bar HRB335 in 3.5 wt.% NaCl solution was investigated, and the tensile mechanical properties after corrosion were tested. The results showed that, with the increase of corrosion time, the corrosion rate of reinforcing bar HRB335 increases and the corrosion becomes heavier. Meanwhile, the yield strength and tensile strength decrease, but the elongation decreases at first and then increases.


2013 ◽  
Vol 765-767 ◽  
pp. 3130-3133
Author(s):  
Ying Wang

The corrosion behavior of rebar HPB235 in 1.5wt.% NaCl solution was studied and its mechanical properties were tested before and after corrosion. The results showed that, with corrosion time increasing from 240h to 720h, the corrosion rate increases and the corrosion becomes heavier and heavier. After 720h, the yield strength, tensile strength and elongation are decreased by different extent.


2013 ◽  
Vol 753-755 ◽  
pp. 516-519 ◽  
Author(s):  
Ying Wang ◽  
Ying Wang

The corrosion behavior of rebar HRB400 in 3.5 wt.% NaCl solution was investigated, and the tensile mechanical properties after corrosion were tested. The results showed that, with the increase of corrosion time, the corrosion rate of rebar HRB400 increases and the corrosion becomes heavier. Meanwhile, the yield strength and tensile strength decrease, but the elongation increases at first and then decreases.


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