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The weldability study of carbon nanotube based 2nd generation primer coated steel for automotive applications

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Abstract

The selection and application of the type coating to steel sheets in automotive industries depend on factors like corrosion protection, manufacturing compatibility and cost. The ‘first generation’ type primer coating improved the corrosion protection of chromate free pretreatments, however it deteriorated the resistance spot weldability of the sheets. The development of 2nd generation primer coating with additives such as CNT showed dominance in corrosion protection properties along with zinc. The present paper investigates the resistance spot weldability of the CNT added primer coating. The weldability was evaluated by comparing the CNT added primer with 1st generation primer for nugget size and electrode life. At lower welding currents, the nugget size of the CNT added primer was significantly lower than the primer coated steels. The increase in the dynamic resistance of the CNT coated steel after nugget formation led to higher nugget sizes at higher currents. The decrease in aluminum and increment in the Fe concentration at the electrode surface during welding of CNT based primer coated steels would improve the electrode life.

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Authors and Affiliations

  1. Department of Advanced Materials Engineering, Dong-Eui University, Busan, 47340, Korea

    Vijeesh Vijayan, Nazmul Huda, Siva Prasad Murugan, Chanyoung Jeong & Yeong-Do Park

  2. Research Center for Green Fine Chemicals, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44412, Korea

    Seung Man Noh

  3. Department of Materials Science and Engineering, Pusan National University, Geumjeong-gu, Busan, 46241, Korea

    Namhyun Kang

Authors
  1. Vijeesh Vijayan
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  2. Nazmul Huda
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  3. Siva Prasad Murugan
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  4. Chanyoung Jeong
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  5. Seung Man Noh
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  6. Namhyun Kang
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  7. Yeong-Do Park
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Corresponding author

Correspondence to Yeong-Do Park.

Additional information

Recommended by Associate Editor Young Whan Park

Vijeesh Vijayan is a Post-Doctoral Researcher at the Department of Advanced Materials Engineering in Dong- Eui University in Busan, South Korea. He received his B.E. in Mechanical Engineering from Visvesvaraya Technological University in Karnataka, India in 2007. He received his M.Tech. in Process Metallurgy and Ph.D. from National Institute of Technology Karnataka, Surathkal, India in 2016. His current research interest includes Resistance spot welding, Advanced high strength steels, Thermal analysis, Solidification analysis, Aluminium alloys.

Yeong-Do Park is a Full-Time Professor at the Department of Advanced Materials Engineering in Dong-Eui University in Busan, South Korea. He received his M.S. and Ph.D. in Metallurgical and Materials Engineering from Colorado School of Mines, USA in 2003.

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Vijayan, V., Huda, N., Murugan, S.P. et al. The weldability study of carbon nanotube based 2nd generation primer coated steel for automotive applications. J Mech Sci Technol 31, 4405–4410 (2017). https://doi.org/10.1007/s12206-017-0840-7

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  • DOI: https://doi.org/10.1007/s12206-017-0840-7

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