Corrosive products alarm system coupled to electrical resistance probes and linear polarization resistance dynamic tests

Abstract:

This paper presents an alarm system that quickly detects changes in the corrosivity of products which pass through the pipelines. Static and dynamic tests wree performed using electrical resistance (ER) probe and linear polarization resistance (LPR) to verify the corrosivity of the tested products. Only results of the dynamic tests performed with these two types of probes are presented. According to results, ER probe technique can identify small variations of corrosivity of different products in up to two minutes. From the obtained results, it was proposed an alarm system that is activated when the variations of the corrosion rate, between two consecutive values, are greater than 0.06 mm/year or less than 0.06 mm/year. In respect to the test results with the LPR technique, no corrosion rate data were recorded for tests in crude oil, due to its low conductivity; however, corrosion rate data were obtained for tests conducted with produced water. This indicates that the successful use of the LPR in a corrosive product alarm system depends on the conductivity of the evaluated products.


Reference:
PAGOTTO JÚNIOR, Sidney Oswaldo; ALMEIDA, Neusvaldo Lira de; BUENO, André Luiz Burdin; MORAES, Paulo Roberto V.; ALBERTIN, José Álvaro de Carvalho; TIROEL, Lorena Cristina de Oliveira. Corrosive products alarm system coupled to electrical resistance probes and linear polarization resistance dynamic tests. In: RIO PIPELINE CONFERENCE & ESHIBITION, 2017, Rio de Janeiro. Anais… 9 p.

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