The search for Oil and Gas has led to the exploration of
wells at increasingly greater depths, which requires the materials used to
possess specific characteristics to withstand severe conditions of temperature
and pressure. In this context, the use of stainless steel has been growing
compared to carbon steels, due to their superior resistance to corrosion. To
address these limitations, a subclass known as super martensitic stainless
steel has emerged. These steels exhibit superior corrosion resistance compared
to martensitic steels, although, under certain conditions, they remain
susceptible to corrosion, particularly pitting, generalized corrosion,
intergranular corrosion, and stress corrosion in acidic environments containing
sulfides. The objective of this study was to evaluate the behavior of the UNS
S41427 super martensitic stainless steel in a solution of hydrochloric acid at
10% and 15%, at temperatures of 30 ºC, 45 ºC, and 60 ºC, over immersion times
of 1 hour and 3 hours, and in concentrations of propargyl alcohol of 250 mg/L,
500 mg/L, and 1000 mg/L. The behavior of the material was also observed in the
solution without the presence of the inhibitor. Gravimetric tests revealed that
the corrosion rate increased with higher concentrations of HCl, temperature,
and immersion time of the test specimen. Furthermore, the addition of propargyl
alcohol resulted in a significant reduction in the corrosion rate under all
analyzed conditions. The results indicated that the inhibitor's protection
efficiency exceeded 80 - 90% in most experimental conditions, corroborating the
initial expectations of the study.
Author(s) Details
Fernando B. Mainier
Universidade Federal Fluminense, Niterói, Rio de Janeiro,
Brazil.
Renata Gomes Calisto
Universidade Federal Fluminense, Niterói, Rio de Janeiro,
Brazil.
Please see the book here:- https://doi.org/10.9734/bpi/cmsdi/v9/3814
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