... N08935 in refinery sour water services. Tests have been performed in H₂S-dominated environments with different NH₄HS concentrations. A total of six different H₂S-dominated environment environments are tested with three different H₂S partial pressures...

...Abstract This paper highlights several cases where alkaline-carbonate stress corrosion cracking (ACSCC) occurred in atypical locations, including a cold wall Fluid Catalytic Cracking (FCC) Unit regenerator, sour water stripper (SWS) pumparound piping, SWS ammonia acid gas knockout piping...

...The key learning from Phase I of the Sour Water JIP was that H₂S partial pressure proved to be the third key parameter that must be considered when assessing the potential for NH₄HS corrosion in alkaline sour water systems. The influence of these three primary key parameters...

...Abstract This paper summarizes results of Phase II of a joint industry program (JIP) that addressed ammonium bisulfide (NH₄HS) corrosion. This phase of the program was focused on NH₃-dominated sour waters typically found in refinery services such as the overhead systems...

... of the Sour Water JIP sponsor companies. We would also like to specifically acknowledge the assistance of Sridhar Srinivasan of InterCorr International, Inc. for his guidance during development of the user-friendly software tool from a large amount of test data and complex set of parametric variables. (1...

... (1) Formerly with InterCorr International, Inc. (2) Acquired InterCorr International, Inc. Abstract This paper summarizes results of a joint industry program (JIP) to address ammonium bisulfide (NH₄HS) corrosion in H₂S-dominated alkaline sour waters typically found...

... compromise the behavior of the cell. Figure 7 shows the curve obtained once the Multitask device was installed in the sour water drain system of a high-pressure vessel in a FCC Light End Recovery Unit. At first, the cell was only electrically connected to the pipe system in the refinery and the detection...

..., but not always achievable. The main sources of HCl in the NHT are: carry over of sour water from the CDU, HCl contamination of the H₂ feed gas, and organic chlorides in the naphtha feed originating in the crude oil or slops. The methods of preventing sour water entry and HCl contamination are well...

...-induced corrosion is evaluated from a mass balance of free cyanide, complexed cyanide, iron, and thiocyanate in hydrocarbon, sour water, and wastewater streams. Analytical methodologies are developed to identify and correct cyanide interferences in sour water for this mass balance. The results of the mass...