An Environmentally Friendly Passivation Technology for the Water-cooling Process of Batch Hot-dip Galvanization
- 10.2991/ice2me-19.2019.37How to use a DOI?
- batch hot-dip galvanizing; water-cooling medium; chromic anhydride passivation; environment-friendly passivation
In batch hot-dip galvanizing, 0.2-0.3 wt% chromic anhydride solution is traditionally used as awater-cooling medium to prevent white rust. It generates a lot of chromium acid mist and wastewater, both of which are very harmful to humans and the environment. In our study, an environmental-friendly passivation technology as a water-cooling medium was developed for the first time. It consisted of several inorganic inhibitors to prevent zinc corrosion such as molybdate, tungstate, vanadate and phosphate. The corrosion resistance, surface morphology, chemical composition and electrochemical behavior of the samples prepared with tap water, 0.2 wt% chromic anhydride solution and new green passivation solution were compared. The new environmentally friendly passivation technology had a similar effect to that of chromic anhydride solution, thus, it had a strong industrial application potential.
- © 2019, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Yongfeng Long AU - Changsheng Liu AU - Hongxin Wen PY - 2019/03 DA - 2019/03 TI - An Environmentally Friendly Passivation Technology for the Water-cooling Process of Batch Hot-dip Galvanization BT - Proceedings of the 2019 International Conference on Electronical, Mechanical and Materials Engineering (ICE2ME 2019) PB - Atlantis Press SP - 166 EP - 169 SN - 2352-5401 UR - https://doi.org/10.2991/ice2me-19.2019.37 DO - 10.2991/ice2me-19.2019.37 ID - Long2019/03 ER -