The global economic cost from corrosion is estimated to be more than US$2.5 trillion, or equivalent to 3.4% of the global GDP. Corrosion costs the U.S. economy close to $300 billion per annum. About 100 billion dollars these costs could be remediated by application of corrosion-resistant materials and the use of corrosion-related technical practices such as corrosion inhibitors. A corrosion inhibitor is a chemical compound that, when added to a liquid or gas, decreases the corrosion rate of a metal, or its alloy that comes into contact with the fluid or vapour. These chemicals are both organic and inorganic compounds, which generally form a protective layer on the metal surface. Some corrosion inhibitors contain heavy metals are harmful to human health, toxic to plants, environments, and animals. They also have adverse effect on the ecology of the receiving environment and on surface and ground water quality. This book focuses on the use of Vappro VBCI Corrosion Inhibitors which are biodegradable, less toxic, and environmentally friendly. The authors believe in creating a cleaner, greener, and better tomorrow for our children and children’s children. Lead Authors Dr Benjamin Valdez Salas Dr Nelson Cheng PhD (honoris causa) Patrick Moe BSc, MSc, Grad Diploma