Development of Austenite Fe Alloy for Melted Zinc Coating Facilities Using the DV-Xα Methods
Min-Sook Baek, Kyeong-Cheol Baek, Yoon-Ja Kim, Dong-Joo Yoon
Sch J Eng Tech | 1-7
DOI : 10.36347/sjet.2021.v09i01.001
In this study, the material used in the hot dip galvanizing equipment was poorly corrosion-resistant, so it was performed to solve the cost and time problems caused by equipment replacement. The theoretical calculation was performed using the DV-Xα method (Discrete Variational Local-density approximation method). The alloy (STS316L) of the equipment currently used has a austenite phase. Therefore, the theoretical calculation was performed by applying Fm-3m, which is a cubic structure. The new alloy was chosen by designing theoretical values close to existing materials. Considering elements that contribute to corrosion, most have high prices. Therefore, the design was completed by adjusting the content using only the components of the reference material in the theoretical design. The final design alloys were chosen as SWA6. Designed SWA6 were dissolved and prepared using an induction furnace. After the heat treatment process was completed, the corrosion rate of the alloys was confirmed by using the potentiodynamic polarization test. The surface of the prepared alloys were processed horizontally and then polished to # 1200 using sand paper to perform potentiodynamic polarization test. 316L: 0.9599 mpy (mils / year), SWA6: 0.828 mpy, alloys designed than 316L had a lower corrosion rate. Therefore, the designed alloy was expected to have better erosion resistance.