A sacrificial coating applied to a steel substrate can add 20 years or more of life to the substrate, depending on its thickness and composition. Different techniques to apply sacrificial coatings offer various characteristics that contribute to corrosion resistance. This article discusses the thermal spray process, hotdipping, and electroplating to apply coatings in steel structures. It describes the corrosion attributes of the resulting coatings and provides a description of the corrosion protection methods of steels by using aluminum and zinc coatings.