 Hey, welcome to this online course on Cathodic Protection Engineering. I am V. S. Raja, a professor at the Department of Metallurgical Engineering and Material Science Indian Institute of Technology Bombay. My interest lies in corrosion science and engineering towards understanding the relation between various aspects of metallurgy to corrosion. I have great fascination for teaching and hence this course. We all know that corrosion of commonly employed engineering alloys are inevitable that is based on the thermodynamics. As a consequence, it causes several issues from economics to safety and ecosystem. This course deals with the external corrosion of buried at the submerged structures. Let me briefly outline the importance of this course and then the course content. In the year 2014, across 120 countries, there existed about 3.5 million kilometer long pipelines. During that year, they planned to have another about 190,000 kilometer long pipelines. In India, the survey made in 2015 and the reported in the annual report 2015 and 16 by the Ministry of Petroleum and Natural Gas Government of India indicates that we had about 15,000 kilometer long pipelines as opposed to just 1,000 kilometer long pipeline in the year 1964. In the same year, they wanted to double the pipelines in the country by augmenting 15,000 kilometer long pipelines. Very interestingly, in that report, they also talk about corrosion protection, plant integrity and the residual life assessment of these pipelines, which are very similar to what we are going to talk about. The corrosion of buried pipelines are the major for any industrialized nations. However, there are other structures which are exposed to soil like the tanks and the mounted bullets and then even the ship hulls which are sailing in the sea are those structures which are offshore. They are all suffered corrosion which are cathodically protected. So, in order to address the external corrosion of these structures, this course is designed. I give here the course outline. It focuses mainly on the pipelines, it talks about the principles, then we will go on to criteria of cathodic protection, pipeline corrosion monitoring and assessment which are related to the surveys, then the anode ground bed design, the anode materials, staker and corrosion coatings. In addition to these courses which are directly relevant to cathodic protection, there are two topics we will be covering which is internal corrosion of the pipelines and the anode protection that is applicable to the sulfuric acid industries. I do hope this course will be beneficial to the students of engineering, discipline and the working professionals.