The effects of the naphtha pysicochemical parameters on its corrosivity: analysis of the influence of the traizine and its breakdown products

Abstract:

Petrochemical naphtha is one of the most aggressive distilled petroleum fractions against carbon steel pipeline systems presenting, in the absence of inhibitors, the result E grade when tested according to the NACE TM-0172 (NACE, 2001) corrosion test. Due to this aggressiveness, naphtha is used as a reference product in the inhibitor qualification process to be used in the Transpetro pipeline systems. Thus, this test used in order to determine the minimum inhibitor concentration which is able to reduce naphtha corrosiveness to acceptable levels (A or B++). In 2006, during the qualification process, the minimum inhibitor concentration levels for some petrochemical naphtha samples collected from São Paulo state refineries were much higher than those recommended by the manufactures, as suitable to reduce the naphtha corrosivity to the acceptable levels. In other naphtha samples, a minimum concentration in the range required for the reduction of their corrosivity was not found. The present project tries to verify the triazine influence and its breakdown products on the naphtha aggressive characteristics and on the response of a corrosion inhibitor.


Reference:
PANOSSIAN, Zehbour; NAGAYASSU, Vanessa Yumi; TRIOEL, Lorena C.O.; POÇO, João Guilherme Rocha; PIMENTA, Gutemberg S . The effects of the naphtha pysicochemical parameters on its corrosivity : analysis of the influence of the traizine and its breakdown products. In: RIO PIPELINE CONFERENCE & EXPOSITION, 2011, Rio de Janeiro. Proceedings… 10 p.

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