Initial oxidation mechanisms of stainless steel Sanicro 28 (35Fe27Cr31Ni) exposed to KCl, NaCl, and K2CO3 under dry and humid conditions at 535 °C

The Long-Term Corrosion Behavior of Fecral(Si) Alloys after Breakaway Oxidation at 600 °C

“…It is well known that alkali salts, such as K 2 CO 3 and KCl, and/or water vapor tend to cause breakaway oxidation for chromia-forming alloys at high temperatures (around 600 • C). The breakdown is explained by the reaction between the salt and the initially formed Crrich corundum type oxide scale (the primary protection of the alloy) which results in Cr-depletion, either caused by the formation of K 2 CrO 4 (K2CO3/KCl) or by the well-known phenomenon chromium evaporation (water vapor) [12,21,23,24,51].…”

Corrosion behavior of T24, T92, VM12, and AISI 304 steels exposed to KCl–NaCl–K2SO4–Na2SO4 salt mixtures

“…The low‐Cr steels are more susceptible to be attacked by KCl–K 2 SO 4 (S3) salt mixture, whereas the high‐Cr steels are by large more susceptible to NaCl–Na 2 SO 4 (S2) deposit. Sui et al [ 43 ] compared the effects of KCl and NaCl on initial corrosion of Sanicro 28 stainless steel at 535°C under dry and wet conditions and they found that KCl and NaCl had a similar influence. They also reported that both chlorides lead to the formation of alkali chromates at 535°C.…”

Improved Oxidation and Hot Corrosion Resistance of 1Cr11Ni2W2MoV Stainless Steel at 650 °C by a Novel Glass-Ceramic Coating

“…At the same time, due to the addition of W, Mo and V, which can react with carbon to form dispersed precipitate, satisfactory comprehensive mechanical properties can be obtained [4]. However, sulfur in fuel and chlorine in marine environments trend to deposit on the surface of the component and form a salt film, which will cause serious hot corrosion invasion on the surface of the MSS [5][6][7][8][9].…”