Pitting corrosion is one of the most common corrosion in the marine environment, which is likely to occur for marine platforms. In addition to the axial load, which is the main loading in the members of the structure of fixed platforms, accidental impact blows including dangerous loads that may occur during the life of the platform. So far, the analysis of these lateral Impacts has been investigated by some scientists in corroded and non-corroded conditions, but none of them has considered pitting corrosion. In this research, the main focus is on the various parameters of the indenture so that the location of the impact during the tube, the size of the indenture and the angle of the indenture and the tube as the variable parameters of the incident, as well as the amount of pre-loading and the supporting conditions of the member are considered as variable tube parameters. Corrosion rate and corrosion location were fixed in all models. In this paper, Ansys software was used for modeling and analyzing numerical models. After extracting the data from this software and transferring them to Excel software, the graphs of the resistance of the pipes were obtained. The general procedure for the result of this study is that the larger the contact area of the indenture and tube, the greater the indenture intrusion and the deformation resulting from the impact will be greater. Also, the study of preloading and support conditions have interesting results, which are discussed in the text of article.