Localized corrosion of 304 stainless steel triggered by embedded MnS

Li, Dan; Huang, Feifei; Lei, Xiaoguang; Jin, Ying

doi:10.1016/j.corsci.2022.110860

Cited by 24 publications

(3 citation statements)

References 48 publications

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“…A more interesting point is that the corrosion attack always starts from the edge areas of individual MnS inclusions, whereas for oxy-sulfide inclusions, the corrosion attack, although starting from the sulfide edge, tends to start from the edge on the oxide side rather than from the side bordering the matrix (See Figure S4 ). This dissolution behavior of individual MnS is consistent with our previous studies on MnS-induced localized corrosion, where MnS as a pitting nucleation site always starts dissolving in its boundary area [ 39 ]. The preferential dissolution of individual MnS from its edge area is driven by the microgalvanic effect between MnS and the surrounding matrix.…”

Section: Resultssupporting

confidence: 91%

Localized Corrosion of Stainless Steel Triggered by Typical Inclusions in NaCl Solution: Oxy-Sulfide and MnS

Zhi

Lai

et al. 2023

Materials

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The localized corrosion behavior of stainless steel (SS) induced by typical inclusion such as MnS and oxy-sulfide in NaCl solution was investigated by immersion tests and microelectrochemical tests. Oxy-sulfide consists of an internal polygonal oxide part and an external sulfide part. The surface Volta potential of the sulfide part is always lower than that of the surrounding matrix, as in the case of individual MnS, while the potential of the oxide part is indistinguishable from that of the surrounding matrix. Sulfides are soluble, while oxides are almost insoluble. Oxy-sulfide exhibits a complex electrochemical behavior in the passive region, which can be attributed to its complex composition and multi-interface coupling effects. It was found that both MnS and oxy-sulfide increase the susceptibility of the local area to pitting corrosion.

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Section: Resultssupporting

confidence: 91%

Localized Corrosion of Stainless Steel Triggered by Typical Inclusions in NaCl Solution: Oxy-Sulfide and MnS

Zhi

Lai

et al. 2023

Materials

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“…3 c), the color of MnS changes, and a pit is observed at the boundary between MnS and the steel matrix. Discoloration of the inclusion indicates dissolution of the inclusion surface 24 , 29 , 39 , 46 . For the area with an artificial MnSe inclusion (represented by the red curve), the current density slightly increases at approximately 0.5 V. This increase was attributed to the anodic dissolution of the MnSe because the passive current density of the stainless steel matrix is approximately 1 × 10 –2 A m –2 .…”

Section: Resultsmentioning

confidence: 99%

Electrochemical properties of MnSe inclusions and improving the pitting corrosion resistance of stainless steel via Se microalloying

Nishimoto,

Katsuyama,

Muto

2024

Sci Rep

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Controlling the electrochemical properties of non-metallic inclusions is of substantial interest in the design of corrosion-resistant alloys. To the best of our knowledge, the dissolution and pitting corrosion behavior of selenide inclusions in stainless steels and the improvement of the pitting corrosion resistance of type 304 stainless steels via Se microalloying have not been investigated. In this study, stainless steel specimens containing artificial MnS and MnSe inclusions were fabricated via spark plasma sintering to systematically investigate their electrochemical properties. The superior pitting corrosion resistance and dissolution resistance of MnSe to those of MnS were demonstrated. The results obtained from the sintered specimens were applied to improve the pitting corrosion resistance of type 304 stainless steels via Se microalloying. Adding a trace amount of Se (0.005 mass%) altered the readily soluble sulfide inclusions to dissolution-resistant selenide-type inclusions, resulting in improved pitting corrosion resistance of type 304 stainless steel.

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“…According to Smialowski et al [13] sulfide inclusions are very effective in pit nucleation. Other works proposed the following mechanism of dissolution for MnS inclusions in steel [14][15][16]:…”

Section: Introductionmentioning

confidence: 99%

Study on the Influence of Non-Metallic Inclusions on the Pitting Corrosion of API 5L X60 Steel

Velázquez,

Hernández-Huerta,

Diaz-Cruz

et al. 2023

Coatings

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The most economical way to move liquids and gaseous hydrocarbons is by using pipelines. According to several international organizations and oil companies, the use of fossil fuels will continue in the following decades. For this reason, it is important to continue studying different corrosion mechanisms and their origins. One of the mechanisms that provoke small leaks, affecting pipeline hermeticity, is pitting corrosion. It is well-known that non-metallic inclusion dissolution can trigger pit nucleation. As pitting corrosion is recognized to be random in nature, it is also interesting to study the random nature of the inclusions present in API 5L X60 steel. Probability distributions commonly used to describe pitting corrosion characteristics are appropriate for studying inclusion characteristics. The size of inclusions plays a key role in pit nucleation because small inclusions tend to generate more defects, especially when these inclusions are compounds of MnS, and the steel is immersed in a corrosive solution. The results of this research work show that there is a close relationship between the random nature of pitting corrosion and inclusions.

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Localized corrosion of 304 stainless steel triggered by embedded MnS

Cited by 24 publications

References 48 publications

Localized Corrosion of Stainless Steel Triggered by Typical Inclusions in NaCl Solution: Oxy-Sulfide and MnS

Localized Corrosion of Stainless Steel Triggered by Typical Inclusions in NaCl Solution: Oxy-Sulfide and MnS

Electrochemical properties of MnSe inclusions and improving the pitting corrosion resistance of stainless steel via Se microalloying

Study on the Influence of Non-Metallic Inclusions on the Pitting Corrosion of API 5L X60 Steel

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