Hydrogen absorption, desorption and embrittlement of Zn and ZnNi-electrodeposited bolts

Sang Hyun Yu, Ahjeong Lyu, In Seok Jang, Hyoung Seok Park, Min Jang, Kee Yang Lee, Young Kook Lee

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


The H contents and H embrittlement (HE) of Zn- and ZnNi-electrodeposited SCM435 bolts were quantitatively evaluated before and after baking. The Zn-coated bolt possessed higher H contents than the ZnNi-coated bolt in as-electrodeposited and baked states. H atoms were strongly trapped inside the coating layers. The Zn-coated bolt underwent flaking of coating layer during baking at temperatures above 200 °C due to H effusion through the brittle δ phase. The Zn-coated bolt exhibited no HE regardless of baking despite of its high H content due to no permeation of H into the steel substrate during electrodeposition and tensile deformation.

Original languageEnglish
Pages (from-to)1604-1610
Number of pages7
JournalJournal of Materials Research and Technology
Publication statusPublished - 2021 Mar 1

Bibliographical note

Funding Information:
The authors gratefully acknowledge the support of the Metallic Materials Cell , Hyundai Mobis , Yongin, Republic of Korea.

Publisher Copyright:
© 2021 The Author(s)

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Biomaterials
  • Surfaces, Coatings and Films
  • Metals and Alloys


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