Skip to main content
SpringerLink
Log in

Study of Brown Patch Defect in Automotive Grade Interstitial Free Steel

  • Case History---Peer-Reviewed
  • Published:
Journal of Failure Analysis and Prevention Aims and scope Submit manuscript

Abstract

Over the years, cold rolled steel surface quality acceptance norms are becoming stringent and accordingly steel suppliers had to improve product quality. Any surface defect will impact the paint ability of steel. This study presents the investigation of one such defect in cold rolled, annealed and temper rolled interstitial free steel sheets. During visual observation shape of defect was found to be irregular indicating it is formed after rolling. Body of defect was not completely solid but there were small defect free spaces within indicating presence of bubbles in the solution which caused these patches. SEM–EDS analysis indicated that the defect is superficial. During Raman spectroscopy, it was identified that the steel sheets had undergone oxidation and traces of wet temper fluid were observed on the defect sample. From visual observation and the laboratory studies, it can be concluded that defect is because of temper agent carryover. Potentiodynamic study of both batches of temper fluid showed comparable corrosive properties with no significant difference. It clearly became evident from laboratory simulation experiment that the carryover of temper fluid on cold rolled sheet could cause formation of brown patches. It is recommended to conduct periodic maintenance and cleaning of plant machineries to avoid temper agent carryover in skin-pass mill.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6

Similar content being viewed by others

References

  1. D.K. Matlock, J.G. Speer, E. De Moor, P.J. Gibbs, Recent developments in advanced high strength sheet steels for automotive applications: an overview. Jestech. 15, 1–12 (2012)

    Google Scholar 

  2. R. Rana, S.B. Singh, Automotive Steels: Design Metallurgy, Processing and Applications. (Woodheadpublishing, Tokyo, 2016)

    Google Scholar 

  3. O. Elkoca, A study on the characteristics of electrical discharge textured skin pass mill work roll. Surf. Coat. Technol. 202, 2765–2774 (2008)

    Article  CAS  Google Scholar 

  4. J. Lenard, Temper Rolling. In Primar on Flat Rolling, (Elsevier, 2007) p. 217

  5. H. Kijima, An experimental investigation on the influence of lubrication on roughness transfer in skin-pass rolling of steel strip. J. Mater. Process. Technol. 225, 1–8 (2015)

    Article  CAS  Google Scholar 

  6. H. Kijima, Influence of lubrication on roughness crushing in skin-pass rolling of steel strip. J. Mater. Process. Technol. 216, 1–9 (2015)

    Article  Google Scholar 

  7. A. Chakraborty, A. Mondal, S. Agnihotri, R. Pais, M. Dutta, Investigation of a surface defect and its elimination in automotive grade galvannealed steels. Eng. Fail. Anal. 66, 455–467 (2016)

    Article  CAS  Google Scholar 

  8. R. Prakash, B.N. Roy, Quality improvement in finished cold rolled sheet by reducing the defect. Int. J. Sci. Eng. Res. 7(3), 595–602 (2016)

    Google Scholar 

  9. R. Smits, J. Smeulders, Surface chemistry-based defects on steel sheet, investigated by SEM/EDS. Iron Steel Technol. 14(2), 46–57 (2017)

    Google Scholar 

  10. S. Chakraborty, A. Pandit, K. Sarkar, N. Rani, Influence of cathodic polarity during electrocleaning process on the brown stain defect formation after skin pass on cold-rolled close annealed steel. Mater. Corros. 71, 1500–1511 (2020)

    Article  CAS  Google Scholar 

  11. S. Das, M.J. Hendry, Application of Raman spectroscopy to identify iron minerals commonly found in mine wastes. Chem. Geol. 290, 101–108 (2011)

    Article  CAS  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Quality Assurance, Tata Steel, Jamshedpur, India

    Sachin Pawar & Ashwin Pandit

  2. Research & Development, Tata Steel, Jamshedpur, India

    Subho Chakraborty

  3. Randstad India Private Limited, Jamshedpur, India

    Suvendu Sekhar Giri

Authors
  1. Sachin Pawar
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Subho Chakraborty
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Suvendu Sekhar Giri
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Ashwin Pandit
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Sachin Pawar.

Additional information

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Rights and permissions

Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Pawar, S., Chakraborty, S., Giri, S.S. et al. Study of Brown Patch Defect in Automotive Grade Interstitial Free Steel. J Fail. Anal. and Preven. 23, 636–642 (2023). https://doi.org/10.1007/s11668-023-01605-y

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s11668-023-01605-y

Keywords

Search

Navigation