We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Effect of inter-critical annealing atmosphere on microstructure and subsequent corrosion behavior of hot-dip galvanized Mn containing high-strength steel.
- Authors
Kancharla, Harikrishna; Mandal, G. K.; Prasad, Nisheeth Kr.; Vishwanath, K.; Bhushan, B.; Godbole, Kirtiratan; Singh, S. S.; Mondal, K.
- Abstract
A systematic study is performed on the development of hot-dip galvanized coatings on a Mn-containing high-strength steel sheet by varying the dew point (− 50, − 10, and + 10 °C) during inter-critical annealing of the steel strip at 800 °C. It also studies the effect of dew point on the corrosion behavior of the coatings in freely aerated 3.5 wt% NaCl solution. The reducing gas atmosphere consists of 95% N2 and 5% H2, where inter-critical annealing is carried out. Surface oxidation of the steel has a strong effect on the development of sound coating. A defect-free adherent galvanized coating is obtained on the annealed steel surface at a fixed dew point of + 10 °C, and it is attributed to the fine and continuous compact Fe-Al crystals compared to galvanized coatings produced at other dew points as well as the highest atomically dense (0002) basal plane. This also leads to the lowest corrosion rate (~ 0.164 mm y−1, where mm and y stand for millimeter and year, respectively) of the galvanized coating produced at a dew point of + 10 °C when compared with galvanized coatings produced at dew points of − 50 °C (~ 0.279 mm y−1) and − 10 °C (~ 0.259 mm y−1). The lowest corrosion rate of the galvanized specimen developed at + 10 °C dew point can be attributed to the uniform and defect-free coating surface, together with the dominance of the more atomically dense (0002) basal plane.
- Subjects
DEW point; STEEL strip; HIGH strength steel; STEEL; MICROSTRUCTURE; SHEET-steel; BORON steel
- Publication
Journal of Applied Electrochemistry, 2024, Vol 54, Issue 5, p1153
- ISSN
0021-891X
- Publication type
Article
- DOI
10.1007/s10800-023-02011-w