Journal of Materials Shaping Technology

, Volume 8, Issue 2, pp 101–105 | Cite as

Deformation behavior of hot dip galvanized coatings in complex sheet metal forming

  • V. Rangarajan
  • C. A. Natalie
  • D. K. Matlock
  • G. Krauss


The hot dipped galvanized coatings of flexible tubes with variable corrosion resistances were examined by x-ray diffraction and scanning electron microscopy (SEM). Accelerated corrosion was related to wide cracks formed during roll forming of coatings with coarse spangle sizes and preferred orientation of Zn basal planes parallel to the coating surface. Coarse spangled coatings with reduced preferred orientation of basal planes parallel to sheet surfaces formed only thin cracks and accommodated forming strain primarily by plastic flow. Coatings with fine spangle sizes and preferred parallel basal plane orientations developed networks of fine cracks during forming. The zinc coatings with fine cracks did not expose sufficient steel to cause accelerated galvanic corrosion.


Basal Plane Zinc Coating Fine Crack Material Shaping Technology Galvanize Coating 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    G.J. Harvey and P.N. Richards, “Zinc Based Coatings for Corrosion Protection of Steel Sheet and Strip,”Metals Forum, vol. 6, No. 4, 1984, pp. 234–247.Google Scholar
  2. 2.
    Corrosion-Resistant Automotive Sheet Steels, ed. L. Allegra, ASM International, Materials Park, Ohio, 1988.Google Scholar
  3. 3.
    M.G. Fontana,Corrosion Engineering, McGraw-Hill Book Company, 1986, pp. 487–492.Google Scholar
  4. 4.
    A. Sabata, “Study of the Corrosion Mechanisms in Modern Painted Precoated Automotive Sheet Steels,” Ph.D Dissertation T-3777, Colorado School of Mines, Golden, Colorado, 1989.Google Scholar
  5. 5.
    V. Rangarajan, N.M. Giallourakis, D.K. Matlock, and G. Krauss, “The Effect of Texture and Microstructure on Deformation of Zinc Coatings,”J. Mater. Shaping Technol., vol. 6, 1989, pp. 217–227.Google Scholar
  6. 6.
    D.I. Cameron, G.J. Harvey, and M.K. Ormay, “The Spangle of Galvanized Iron,”J. Austr. Inst. Metals, vol. 10, 1965, pp. 255–264.Google Scholar
  7. 7.
    D.I. Cameron and G.J. Harvey, “Solidification and Spangle of Galvanized Coatings,” Proc. of 8th Int. Conf. on Hot Dip Gal., London, 1967, pp. 86–97.Google Scholar
  8. 8.
    “The Forming of Galvanized Sheet Steels,”Guidelines for Automotive Applications, American Iron and Steel Institute, AISI No. SG539 0286-10M-RI.Google Scholar

Copyright information

© Springer-Verlag New York Inc 1990

Authors and Affiliations

  • V. Rangarajan
    • 1
  • C. A. Natalie
    • 1
  • D. K. Matlock
    • 1
  • G. Krauss
    • 1
  1. 1.Advanced Steel Processing and Products Research CenterColorado School of MinesGolden

Personalised recommendations