[IEEE 2018 1st- International Scientific Conference of Engineering Sciences - 3rd Scientific Conference of Engineering Science (ISCES) - DIYALA, Iraq (2018.1.10-2018.1.11)] 2018 1st International Scientific Conference of Engineering Sciences - 3rd Scientific Conference of Engineering Science (ISCES) - Mathematical and artificial neural network models for corrosion of high temperature — High pressure boiler pipes in presence of oxygen scavengers