Experimental Analysis of Corrosive Impact of Oxidizing and Non-oxidizing Environment on Sensitized Welded and Unwelded Samples of AISI 316

Silas Ezedinma Agbokwor; Daniel Oray Nnamdi Obikwelu; Simeon Ikechukwu Neife

doi:doi:10.11648/j.ajmme.20190303.13

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Experimental Analysis of Corrosive Impact of Oxidizing and Non-oxidizing Environment on Sensitized Welded and Unwelded Samples of AISI 316

Silas Ezedinma Agbokwor, Daniel Oray Nnamdi Obikwelu, Simeon Ikechukwu Neife

Published in American Journal of Mechanical and Materials Engineering (Volume 3, Issue 3)

Received: 11 September 2019 Accepted: 9 October 2019 Published: 28 October 2019

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Abstract

An experimental analysis was carried out to investigate the corrosivity of sensitized welded and unwelded austenitic stainless steel AISI 316, in oxidizing (H₂SO4) and non-oxidizing (HCL) media. The selected samples were cut into several equal pieces. To induce sensitization, the samples were heated and soaked at 750°C at different soaking time intervals such as 30 minutes, 60 minutes, 180minutes, 300 minutes and 600 minutes followed by water quenching. The sensitized welded and unwelded samples each were subjected to immersion duration test in the oxidizing and non-oxidizing media for 5, 10, 15, 20, 25, 30, 35, 40, 45, and 50 minutes, respectively. It was concluded from the results obtained that corrosion rate of welded and unwelded decreases as soaking time and immersion duration increases at constant soaking temperature, in non-oxidizing medium of hydroChloric acid (HCL); but the decrease in corrosion rate is more in the unwelded samples. In the oxidizing medium of sulphoric acid (H₂SO4); corrosion rate of the samples decreased as immersion duration/soaking time increases. However, the welded samples experienced erratic behaviour in the oxidizing medium, having a lower corrosion rate than their unwelded counterpart surprisingly, at immersion duration between 25-50 minutes as soaking time increases at constant soaking temperature of 750°C.

Published in	American Journal of Mechanical and Materials Engineering (Volume 3, Issue 3)
DOI	10.11648/j.ajmme.20190303.13
Page(s)	61-69
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2019. Published by Science Publishing Group

Keywords

Austenitic Stainless Steel AISI 316, Corrosion Rate, Sensitization, Immersion Duration, Oxidizing and Non-oxidizing Media, Soaking Temperature, Soaking Time, Welded and Unwelded

References

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APA Style

Silas Ezedinma Agbokwor, Daniel Oray Nnamdi Obikwelu, Simeon Ikechukwu Neife. (2019). Experimental Analysis of Corrosive Impact of Oxidizing and Non-oxidizing Environment on Sensitized Welded and Unwelded Samples of AISI 316. American Journal of Mechanical and Materials Engineering, 3(3), 61-69. https://doi.org/10.11648/j.ajmme.20190303.13

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ACS Style

Silas Ezedinma Agbokwor; Daniel Oray Nnamdi Obikwelu; Simeon Ikechukwu Neife. Experimental Analysis of Corrosive Impact of Oxidizing and Non-oxidizing Environment on Sensitized Welded and Unwelded Samples of AISI 316. Am. J. Mech. Mater. Eng. 2019, 3(3), 61-69. doi: 10.11648/j.ajmme.20190303.13

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AMA Style

Silas Ezedinma Agbokwor, Daniel Oray Nnamdi Obikwelu, Simeon Ikechukwu Neife. Experimental Analysis of Corrosive Impact of Oxidizing and Non-oxidizing Environment on Sensitized Welded and Unwelded Samples of AISI 316. Am J Mech Mater Eng. 2019;3(3):61-69. doi: 10.11648/j.ajmme.20190303.13

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@article{10.11648/j.ajmme.20190303.13,
  author = {Silas Ezedinma Agbokwor and Daniel Oray Nnamdi Obikwelu and Simeon Ikechukwu Neife},
  title = {Experimental Analysis of Corrosive Impact of Oxidizing and Non-oxidizing Environment on Sensitized Welded and Unwelded Samples of AISI 316},
  journal = {American Journal of Mechanical and Materials Engineering},
  volume = {3},
  number = {3},
  pages = {61-69},
  doi = {10.11648/j.ajmme.20190303.13},
  url = {https://doi.org/10.11648/j.ajmme.20190303.13},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajmme.20190303.13},
  abstract = {An experimental analysis was carried out to investigate the corrosivity of sensitized welded and unwelded austenitic stainless steel AISI 316, in oxidizing (H2SO4) and non-oxidizing (HCL) media. The selected samples were cut into several equal pieces. To induce sensitization, the samples were heated and soaked at 750°C at different soaking time intervals such as 30 minutes, 60 minutes, 180minutes, 300 minutes and 600 minutes followed by water quenching. The sensitized welded and unwelded samples each were subjected to immersion duration test in the oxidizing and non-oxidizing media for 5, 10, 15, 20, 25, 30, 35, 40, 45, and 50 minutes, respectively. It was concluded from the results obtained that corrosion rate of welded and unwelded decreases as soaking time and immersion duration increases at constant soaking temperature, in non-oxidizing medium of hydroChloric acid (HCL); but the decrease in corrosion rate is more in the unwelded samples. In the oxidizing medium of sulphoric acid (H2SO4); corrosion rate of the samples decreased as immersion duration/soaking time increases. However, the welded samples experienced erratic behaviour in the oxidizing medium, having a lower corrosion rate than their unwelded counterpart surprisingly, at immersion duration between 25-50 minutes as soaking time increases at constant soaking temperature of 750°C.},
 year = {2019}
}

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TY  - JOUR
T1  - Experimental Analysis of Corrosive Impact of Oxidizing and Non-oxidizing Environment on Sensitized Welded and Unwelded Samples of AISI 316
AU  - Silas Ezedinma Agbokwor
AU  - Daniel Oray Nnamdi Obikwelu
AU  - Simeon Ikechukwu Neife
Y1  - 2019/10/28
PY  - 2019
N1  - https://doi.org/10.11648/j.ajmme.20190303.13
DO  - 10.11648/j.ajmme.20190303.13
T2  - American Journal of Mechanical and Materials Engineering
JF  - American Journal of Mechanical and Materials Engineering
JO  - American Journal of Mechanical and Materials Engineering
SP  - 61
EP  - 69
PB  - Science Publishing Group
SN  - 2639-9652
UR  - https://doi.org/10.11648/j.ajmme.20190303.13
AB  - An experimental analysis was carried out to investigate the corrosivity of sensitized welded and unwelded austenitic stainless steel AISI 316, in oxidizing (H2SO4) and non-oxidizing (HCL) media. The selected samples were cut into several equal pieces. To induce sensitization, the samples were heated and soaked at 750°C at different soaking time intervals such as 30 minutes, 60 minutes, 180minutes, 300 minutes and 600 minutes followed by water quenching. The sensitized welded and unwelded samples each were subjected to immersion duration test in the oxidizing and non-oxidizing media for 5, 10, 15, 20, 25, 30, 35, 40, 45, and 50 minutes, respectively. It was concluded from the results obtained that corrosion rate of welded and unwelded decreases as soaking time and immersion duration increases at constant soaking temperature, in non-oxidizing medium of hydroChloric acid (HCL); but the decrease in corrosion rate is more in the unwelded samples. In the oxidizing medium of sulphoric acid (H2SO4); corrosion rate of the samples decreased as immersion duration/soaking time increases. However, the welded samples experienced erratic behaviour in the oxidizing medium, having a lower corrosion rate than their unwelded counterpart surprisingly, at immersion duration between 25-50 minutes as soaking time increases at constant soaking temperature of 750°C.
VL  - 3
IS  - 3
ER  -

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Author Information

Silas Ezedinma Agbokwor

Department of Mechanical Engineering, Faculty of Engineering, University of Nigeria Nsukka (UNN), Nsukka, Nigeria
Daniel Oray Nnamdi Obikwelu

Department of Metallurgical and Materials Engineering, Faculty of Engineering, University of Nigeria Nsukka (UNN), Nsukka, Nigeria
Simeon Ikechukwu Neife

Department of Metallurgical and Materials Engineering, Faculty of Engineering, University of Nigeria Nsukka (UNN), Nsukka, Nigeria

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Silas Ezedinma Agbokwor, Daniel Oray Nnamdi Obikwelu, Simeon Ikechukwu Neife. (2019). Experimental Analysis of Corrosive Impact of Oxidizing and Non-oxidizing Environment on Sensitized Welded and Unwelded Samples of AISI 316. American Journal of Mechanical and Materials Engineering, 3(3), 61-69. https://doi.org/10.11648/j.ajmme.20190303.13

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ACS Style

Silas Ezedinma Agbokwor; Daniel Oray Nnamdi Obikwelu; Simeon Ikechukwu Neife. Experimental Analysis of Corrosive Impact of Oxidizing and Non-oxidizing Environment on Sensitized Welded and Unwelded Samples of AISI 316. Am. J. Mech. Mater. Eng. 2019, 3(3), 61-69. doi: 10.11648/j.ajmme.20190303.13

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AMA Style

Silas Ezedinma Agbokwor, Daniel Oray Nnamdi Obikwelu, Simeon Ikechukwu Neife. Experimental Analysis of Corrosive Impact of Oxidizing and Non-oxidizing Environment on Sensitized Welded and Unwelded Samples of AISI 316. Am J Mech Mater Eng. 2019;3(3):61-69. doi: 10.11648/j.ajmme.20190303.13

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@article{10.11648/j.ajmme.20190303.13,
  author = {Silas Ezedinma Agbokwor and Daniel Oray Nnamdi Obikwelu and Simeon Ikechukwu Neife},
  title = {Experimental Analysis of Corrosive Impact of Oxidizing and Non-oxidizing Environment on Sensitized Welded and Unwelded Samples of AISI 316},
  journal = {American Journal of Mechanical and Materials Engineering},
  volume = {3},
  number = {3},
  pages = {61-69},
  doi = {10.11648/j.ajmme.20190303.13},
  url = {https://doi.org/10.11648/j.ajmme.20190303.13},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajmme.20190303.13},
  abstract = {An experimental analysis was carried out to investigate the corrosivity of sensitized welded and unwelded austenitic stainless steel AISI 316, in oxidizing (H2SO4) and non-oxidizing (HCL) media. The selected samples were cut into several equal pieces. To induce sensitization, the samples were heated and soaked at 750°C at different soaking time intervals such as 30 minutes, 60 minutes, 180minutes, 300 minutes and 600 minutes followed by water quenching. The sensitized welded and unwelded samples each were subjected to immersion duration test in the oxidizing and non-oxidizing media for 5, 10, 15, 20, 25, 30, 35, 40, 45, and 50 minutes, respectively. It was concluded from the results obtained that corrosion rate of welded and unwelded decreases as soaking time and immersion duration increases at constant soaking temperature, in non-oxidizing medium of hydroChloric acid (HCL); but the decrease in corrosion rate is more in the unwelded samples. In the oxidizing medium of sulphoric acid (H2SO4); corrosion rate of the samples decreased as immersion duration/soaking time increases. However, the welded samples experienced erratic behaviour in the oxidizing medium, having a lower corrosion rate than their unwelded counterpart surprisingly, at immersion duration between 25-50 minutes as soaking time increases at constant soaking temperature of 750°C.},
 year = {2019}
}

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TY  - JOUR
T1  - Experimental Analysis of Corrosive Impact of Oxidizing and Non-oxidizing Environment on Sensitized Welded and Unwelded Samples of AISI 316
AU  - Silas Ezedinma Agbokwor
AU  - Daniel Oray Nnamdi Obikwelu
AU  - Simeon Ikechukwu Neife
Y1  - 2019/10/28
PY  - 2019
N1  - https://doi.org/10.11648/j.ajmme.20190303.13
DO  - 10.11648/j.ajmme.20190303.13
T2  - American Journal of Mechanical and Materials Engineering
JF  - American Journal of Mechanical and Materials Engineering
JO  - American Journal of Mechanical and Materials Engineering
SP  - 61
EP  - 69
PB  - Science Publishing Group
SN  - 2639-9652
UR  - https://doi.org/10.11648/j.ajmme.20190303.13
AB  - An experimental analysis was carried out to investigate the corrosivity of sensitized welded and unwelded austenitic stainless steel AISI 316, in oxidizing (H2SO4) and non-oxidizing (HCL) media. The selected samples were cut into several equal pieces. To induce sensitization, the samples were heated and soaked at 750°C at different soaking time intervals such as 30 minutes, 60 minutes, 180minutes, 300 minutes and 600 minutes followed by water quenching. The sensitized welded and unwelded samples each were subjected to immersion duration test in the oxidizing and non-oxidizing media for 5, 10, 15, 20, 25, 30, 35, 40, 45, and 50 minutes, respectively. It was concluded from the results obtained that corrosion rate of welded and unwelded decreases as soaking time and immersion duration increases at constant soaking temperature, in non-oxidizing medium of hydroChloric acid (HCL); but the decrease in corrosion rate is more in the unwelded samples. In the oxidizing medium of sulphoric acid (H2SO4); corrosion rate of the samples decreased as immersion duration/soaking time increases. However, the welded samples experienced erratic behaviour in the oxidizing medium, having a lower corrosion rate than their unwelded counterpart surprisingly, at immersion duration between 25-50 minutes as soaking time increases at constant soaking temperature of 750°C.
VL  - 3
IS  - 3
ER  -

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