Corrosion behavior of low-alloy steel with martensite/ferrite microstructure at vapor-saturated CO2 and CO2-saturated brine conditions

Corrosion behavior of low‐alloy steel used for pipeline at vapor‐saturated CO2 and CO2‐saturated brine conditions

“…Similarly, the Cr‐rich carbides in the designed steel may be the cathodic site, and ferrite dissolves preferentially compared with tempered martensite. This hypothesis is confirmed by our previous experiment . So, the small valleys could be the original ferrite.…”

The Effects of Cr/Mo Micro-Alloying on the Corrosion Behavior of Carbon Steel in CO2-Saturated (Sweet) Brine under Hydrodynamic Control

“…Figures 12a and 12b are the TEM images of FIB sectioned micro-alloy steel (1Cr.0.7Mo) showing scale thickness of ∼0.15 μm at 100 RPM and ∼1 μm at 1000 RPM respectively. The scales are significantly thinner than those reported at lower pH [15][16][17][18][19] and show a uniform distribution of Cr at a low concentration throughout the thickness with no evidence of Crclustering ( Figure 13). Under the conditions that we have studied, there is no evidence for an amorphous discrete Cr(OH) 3 phase.…”

“…As expected, flow was shown to be important through its effect on supersaturation and precipitation of both FeCO 3 and Cr(OH) 3 . 18 The distribution of Cr between different elements of the microstructure also appeared to be important, 16 perhaps because that affected the dissolution rate of Cr from the alloy. Alloying and heat-treatment also changed the amount and morphology of Fe 3 C, which can act as the cathodic site in open-circuit corrosion; 12 corrosion of different microstructures further changes the interfacial roughness, which changes the local supersaturation and hence scale precipitation kinetics.…”

A review on clogging of recirculating steam generators in Pressurized-Water Reactors

“…bends and TSP, promote FAC. EDF progressively replaces carbon steel in these regions by stainless steel, which is less affected by FAC in nuclear power plants [42][43][44][45][46][47]. Nowadays, the most recent EDF TSPs are made of 13 wt% Cr stainless steel [2,48].…”