Electrochemical noise analysis of pitting corrosion of J55 steel in NaCl + NaHCO₃ electrolytes

Abstract

Electrochemical noise (EN) was used to study the pitting corrosion of J55 steel in NaCl/NaHCO 3 electrolytes. Below critical ratio for Cl − to HCO − , the corrosion rate increased with added NaCl, and conversely, decreased above that level. Also, the critical ratio was between 1 and 1.66. The PSD for potential and current noise were linear and rather gently sloped. J55 casing steel was quite sensitive to NaCl/NaHCO 3 electrolytes.

Experimental correlation between metallographic evaluation and electrochemical noise in intergranular corrosion tests of aluminium alloys

“…R n is the most employed parameter for analysing EN data because it is easy to calculate and interpret. R n is generally related to the corrosion activity of the systems (strictly corrosion rate only in the case of uniform corrosion under activation control), showing low values when the studied system has a high activity . In the present work, the averaged R n values of all records of each test have been estimated.…”

A Recent Progress of Steel Bar Corrosion Diagnostic Techniques in RC Structures

“…By combining other technologies [159], EN technology is useful tools for monitoring corrosion status and identification of corrosion types, such as uniform corrosion [160], especially for pitting corrosion [161,162] and galvanic corrosion [163]. Furthermore, EN is used to investigate the inhibition performance of novel inhibitors for steel, like LPR and EIS [164].…”