Study of internal corrosion on the turning angles in steel pipesBauyrzhan Manapbayev, Bazartai Alimbayev, Erkegali Amanbayev, Arman Kabdushev and Zhangazy MoldamuratovE3S Web of Conf., 225 (2021) 01004DOI: https://doi.org/10.1051/e3sconf/202122501004