Heo Jun, Lee Sang Yoon, Lee Jaewoo, Alfantazi Akram, Cho Sung Oh
Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea.
Department of Chemical Engineering, Khalifa University of Science and Technology, Abu Dhabi 127788, United Arab Emirates.
Nanomaterials (Basel). 2021 Mar 25;11(4):838. doi: 10.3390/nano11040838.
In this study, we fabricated a nanoporous oxide layer by anodization to improve corrosion resistance of type 304 stainless steel (SS) gas tungsten arc weld (GTAW). Subsequent heat treatment was performed to eliminate any existing fluorine in the nanoporous oxide layer. Uniform structures and compositions were analyzed with field emission scanning electron microscope (FESEM) and X-ray diffractometer (XRD) measurements. The corrosion resistance of the treated SS was evaluated by applying a potentiodynamic polarization (PDP) technique and electrochemical impedance spectroscopy (EIS). Surface morphologies of welded SS with and without treatment were examined to compare their corrosion behaviors. All results indicate that corrosion resistance was enhanced, making the treatment process highly promising.
在本研究中，我们通过阳极氧化制备了纳米多孔氧化层，以提高304型不锈钢（SS）气体钨极电弧焊（GTAW）的耐腐蚀性。随后进行热处理以消除纳米多孔氧化层中任何现存的氟。用场发射扫描电子显微镜（FESEM）和X射线衍射仪（XRD）测量分析了均匀的结构和成分。通过应用动电位极化（PDP）技术和电化学阻抗谱（EIS）评估了处理后SS的耐腐蚀性。检查了经过处理和未经过处理的焊接SS的表面形貌，以比较它们的腐蚀行为。所有结果表明耐腐蚀性得到了增强，使得该处理工艺极具前景。
