At the project phase, the main responsibility of a corrosion engineer is to develop Corrosion Management Program (CMP) and establish a corrosion control strategy for specific individual units. A well-designed Corrosion Management Program is the most useful material not only to prepare a corrosion control strategy, create a reliable inspection plan but also to promote corrosion knowledge management, corrosion talent development and training, integration with other disciplines such as process, operation, inspection, maintenance.
The Hydroprocessing unit is the crucial process of the refinery as high temperature and high-pressure operation conditions are in which major catastrophic accident occurs. An understanding of variables influencing corrosion in hydroprocessing units is necessary for corrosion engineers to improve the reliability, safety and environment impact associated with them. This paper describes an example of how Corrosion Management Program (CMP) and Integrity Operating Windows (IOW) are used for developing specific corrosion control strategy, corrosion knowledge sharing and integration with other disciplines to prepare customized corrosion control strategy of hydroprocessing unit in JAZAN project. The development of corrosion management strategy of Hydroprocessing is focused on the Reactor Effluent Air Cooler system corrosion control using a water-washing method.

Gas Oil Hydrotreating Unit uses a catalytic hydrotreating process employing a selective catalyst and a hydrogen-rich gas stream to decompose organic sulfur, oxygen and nitrogen compounds contained in the feed. The products of these reactions are the contaminant free hydrocarbon, along with H₂S and NH₃. Other Treating reactions include halide removal and aromatic saturation. Reactor effluent is cooled in series of Combined Feed Exchangers followed by REAC for product separation. The reactor effluent system is prone for corrosion and fouling due to salting of NH₄HS and NH₄Cl. Most of the failure analysis studies and literature available in public domain regarding reactor effluent corrosion deals with the corrosion in the REAC and its outlet piping.