Corrosion Science and Technology

The Corrosion Science Society of Korea (한국재료부식학회)
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24 Years of Galvanized Autobody Partnership - Highlights and Prospects

  • A. P. Domingos (International Zinc Association) ;
  • F. E. Goodwin (International Zinc Association)
  • Received : 2024.09.19
  • Accepted : 2024.11.30
  • Published : 2025.12.31
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Abstract

Automotive industry requirements continue to drive advancements in the hot-dip galvanizing (HDG) process. While zinc-coated advanced high-strength steels (AHSS) are routinely produced, further improvements are still necessary. To enhance control over AHSS surface uniformity during annealing, computational tools are being developed to predict selective oxidation of alloy elements and surface decarburization. Presshardened steels (PHS) are increasingly being used to optimize steel utilization in automotive body structures, and advancements in utilizing zinc-coated grades to improve their durability are ongoing. This document describes the effects of processing both galvannealed (GA) and galvanizing (GI) coated precursor grades. A significant cause of HDG process deviations is inaccuracies in pyrometric temperature measurements in the pretreatment furnace. Research on the effects of dewpoints and temperatures on emissivity has been conducted, leading to the development of a predictive model. The contributions of the Galvanized Autobody Partnership (GAP) program-a collaboration between the steel and zinc industries and their suppliers-to these improvements are discussed, along with implications for further technical developments.

Keywords

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