This book contains useful materials related to prediction, measurement, and analysis of corrosion in pipelines and elbows due to presence of CO2 in transported fluids. The CO2 corrosion prediction and analysis in this book is performed using NORSOK model but selected models in the open literature are introduced. other wear phenomena interacted with corrosion (i.e. sand erosion) is highlighted and the co-action of erosion-corrosion is investigated. The book is useful in the filed of production and transportation of oil and gas.