This bachelor thesis deals with the protection of cargo tanks, chemical tanker coatings which are the most common form of protection of cargo tanks. Due to the variety of cargos that occur while the ships are in operation for the transport of chemicals, in addition to corrosion protection, it is necessary to insure that aggressive chemicals cannot penetrate the protective coating and damage the base material and to avoid contamination of the cargo. For this purpose, many different coatings have been developed, which, depending on their composition, prevent corrosion and other damage caused by aggressive chemical influences. In order to ensure the protection for which coatings are intended, it is necessary to ensure proper preparation of the surface as well as to ensure proper operating technology and control. The bachelor thesis describes the procedure of surface preparation, techniques and methods of coatings` application, the selection of appropriate coatings and the most common coatings used to protect the cargo tanks on chemical tankers.