Abstract: Challenges due to erosion-corrosion in oil and gas production are briefly reviewed. The achievements of the author's group on the modeling of synergistic effects erosion are summarized. The erosion-corrosion mechanisms, the methods to evaluate the erosion-corrosion resistance of materials and the approaches to mitigate the damage caused by erosion-corrosion are discussed in this article. This article is presented in two parts. Part 2 focuses on the corrosion-enhanced erosion, the methodology to predict the erosion corrosion behavior and technology to mitigate erosion corrosion in oil/gas production.