▎ 摘　　要

NOVELTY - Operating a hydroprocessing reactor involves applying a graphene-based coating to the surfaces of the reactor, introducing a feed comprising crude oil or its fractions and hydrogen into the reactor, and increasing an operating temperature of the reactor to a temperature in the range of 36-600degrees Celsius. The reactor is operated in a pressure range of 10-250 bar, and hydroprocessed the feed in the reactor. The graphene-based coating defines a barrier on the surfaces of the reactor that prevents corrosion. USE - Method for operating hydroprocessing reactor. ADVANTAGE - The method improves corrosion protection provided by the graphene-based coatings, where the thickness of the metal components of the hydroprocessing unit can be drastically reduced, and provides cost-savings in the production of the hydroprocessing unit components. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) a method for preventing corrosion in a hydroprocessing unit, which involves applying a coating to a surface of the hydroprocessing unit, where the coating comprises graphene, testing the coated surface of the hydroprocessing unit to determine whether the coating covers the entire surface of the hydroprocessing unit, and applying additional coating to one or more areas of the surface of the hydroprocessing unit that were determined not to be covered by the initial coating; and (2) a hydroprocessing unit having increased lifespan and decreased susceptibility to corrosion, comprises at least one component having one or more surfaces, and a graphene-based coating applied to the one or more surfaces, where the graphene-based coating comprises a first layer of graphene applied directly to the one or more surfaces and a second layer of clad material applied on top of the first layer of graphene, and where the graphene-based coating prevents corrosion on the one or more surfaces.