Sharif University of Technology Scientia Iranica 1026-3098 29 6 2022 12 01 Effect of hydrochloric acid corrosion and CFRP coating on the buckling behavior of cylindrical shells under external pressure 2886 2901 22592 10.24200/sci.2021.57618.5332 EN A. C. Aydin Department of Civil Engineering, Engineering Faculty, Ataturk University, Erzurum, Turkey 0000-0002-6696-4297 M. B. Bilen Department of Civil Engineering, Architecture and Engineering Faculty, Erzurum Technical University, Erzurum, Turkey M. Maali Department of Civil Engineering, Architecture and Engineering Faculty, Erzurum Technical University, Erzurum, Turkey 0000-0002-6398-1139 Journal Article 2021 01 25 Thin walled cylindrical shells are being widely used as silos, liquid tanks, marine structures, and industrial chemical plants. In such applications, the shells are mostly exposed to liquids. When shells filled with low-pH-liquids, corrosion occurs at the surface. Corroded material loss, causes the thickness of the shells to decrease, and it reduces the buckling capacity of shells. The purpose of this study is to investigate the effects of corrosion on the buckling capacity of thin walled cylindrical shells subjected to uniform external pressure. The model shells were half or full filled with 5% and 10% HCl (Hydrochloric Acid) solutions for corrosion. To tolerate the negative effects of corrosion, the cylinders were coated with varying sizes of CFRP sheet. Totally 12 models were investigated throughout this research, with the dimensions of 800x400x0.45 mm (with and without CFRP). The perfect non-corroded models were used to compare the behavior of all the models. Results show that corrosion causes a significant decrease on the buckling capacity of thin walled cylindrical shells. Acid ratio, filling rate and surface area coated with CFRP fabrics affects the buckling capacity of cylinders. Coating the cylinders with one layer of CFRP resulted with tolerating the buckling capacity loss. https://scientiairanica.sharif.edu/article_22592_acaf560f85092ac1e43b57340fd30d8d.pdf