The document discusses corrosion control techniques for underground pipelines, including coatings, cathodic protection, and chemical inhibitors. It outlines the objectives of minimizing corrosion to increase pipeline lifespan and safety. Key techniques are summarized, such as using coatings as a barrier between the pipeline and environment, cathodic protection methods like galvanic anodes and impressed current, and chemical inhibitors. Field surveys like pipe-to-soil potential and close interval potential surveys are described. Experimental work involved performing these surveys on various pipelines and coating inspection. The conclusion emphasizes the importance of corrosion control for oil/gas pipelines and following standards like NACE for cathodic protection.