Towards a reliable determination of the intergranular corrosion rate of austenitic stainless steel in oxidizing media

Morphology and stress evolution during the initial stages of intergranular corrosion of X70 steel

“…Further, intergranular corrosion rates can be inferred by observing grain boundary morphology evolution. Despite the relevance of intergranular corrosion to high-pH SCC of pipeline steels, no detailed characterization of grain boundary morphology evolution during IGC of ferritic steels has been reported in the literature, in contrast to the knowledge base about such processes on austenitic stainless steels [16]. Also, it has been proposed that corrosion-induced wedging stress at grain boundaries can assist crack initiation and growth [17][18][19][20].…”

The role of titanium in the initiation of localized corrosion of stainless steel 444

“…The radius of glass sheath (r glass ), radius of microelectrode (r UME ) and diameter of inclusion (s) were selected based on experimental parameters, with r UME = 2.35 µm, r glass = 22.56 µm, and s = 8 µm. c Extraction of local rate constants from PAC performed over a TiN inclusion [1] and passivated metal matrix [2]. Pure positive and negative feedback are shown for comparison purposes.…”

Corrosion properties of steel in 1-butyl-3-methylimidazolium hydrogen sulfate ionic liquid systems for desulfurization application

“…With the weight loss rate, the average corrosion rate on the basis of equivalent thickness loss can be calculated as reported in the literature: 39,40…”

“…In addition to the pitting corrosion, there also appears the intergranular corrosion over the surface, which is attributed to the polarization of the stainless steel specimen in its transpassive domain in H 2 O 2 . 40 Compared to stainless steel, mild steel exposed to the same IL solution suffers more severe corrosion by localized attack (see Fig. 10).…”