The basics of corrosion protection of buildings, structures, structures and equipment are set out. Classification and characteristics of protective coatings are given, issues of surface preparation for corrosion protection by various methods are considered. Examples of corrosion protection of bridges, pipelines, ship structures, tanks and tanks for storing oil and oil products and other structures are given. Issues of biological protection are considered. Solutions for biological corrosion protection are proposed. Classification of methods and means of biological protection of wood is given.