Effect of Cr content on the passivation behavior of Cr alloy steel in a CO2 aqueous environment containing silty sand

Zhao, Yonggang; Liu, Wei; Fan, Yongquan; Fan, Endian; Dong, Bo‐Qing; Zhang, Tianyi; Li, Yong

doi:10.1016/j.corsci.2020.108591

Cited by 60 publications

(28 citation statements)

References 47 publications

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“…The x‐ray diffraction analysis results at the base metal region showed only body‐centered cubic (BCC) crystal structures as ferrite structure, Figure 7a. However, low‐chromium alloy steels with a carbon content of 0.38 % for base metal led to form a pearlite and ferrite structure [30]. In addition, this type of steel was hardened and tempered, resulting in a bainite structure as well.…”

Section: Resultsmentioning

confidence: 99%

Microstructural analysis of martensitic hard surfacing on low chromium alloy steel

Oo,

Muangjunburee,

Abd Rahim

et al. 2023

Materialwissenschaft Werkst

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This study focuses on the metallurgical characterization of single and multi‐layer martensitic hard surfacing onto non‐standardized low‐chromium alloy steel with a single buttering layer using an automatic submerged arc welding process as a standard reference. The metallurgical properties of hard surfaced samples are examined using an optical microscope, energy dispersive x‐ray spectroscopy, and x‐ray diffractometer. Micro‐Vickers hardness testing is also conducted to analyze and confirm the metallographic results of hard surfacing. The current study finds that the microstructure of each region is influenced by three key factors: chemical composition, heat input, and dilution. The structural type is determined by the chemical composition of materials, heat input influences the structural characteristics in the heat‐affected zone (needle‐shape martensite and tempered martensite), and dilution affects the structural characteristics of the hard surfacing layers (martensite with retained austenite). Comparing multi‐layer hard surfacing to single‐hard surfacing, the hardness values of the heat‐affected zone of the multi‐layer hard surfacing are greatly reduced, while the hardness values of the hard surfacing layers are raised.

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Section: Resultsmentioning

confidence: 99%

Microstructural analysis of martensitic hard surfacing on low chromium alloy steel

Oo,

Muangjunburee,

Abd Rahim

et al. 2023

Materialwissenschaft Werkst

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“…The R s is the resistance of the solution, the constant phase elements (CPE) were used to describe the behavior of capacitance, and the R ct is the charge transfer resistance. The resistance of CPE can be expressed by the following equation [ 24 ] :

Z=\frac{1}{{Y}_{0}{(j\omega )}^{n}},

where Y 0 is the frequency independent, j is the imaginary number, ω is the radial frequency and n is the dispersion coefficient related to the surface homogeneity of solid electrodes. According to the work of other researchers, [ 25,26 ] the value of Y 0 can be regarded as the characterization parameter of the passivation film thickness of MSS.…”

Section: Resultsmentioning

confidence: 99%

Section: Corrosion Resistancementioning

confidence: 99%

Corrosion resistance improvement in 6Cr13 martensitic stainless steel via quenching‐tempering and partitioning

Song

Yan

et al. 2022

Materials & Corrosion

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In this work, the effect of the temperature of quenching-tempering and partitioning on the corrosion resistance of 6Cr13 martensitic stainless steel was investigated by immersion test and electrochemical test. The results show that tempering and partitioning can improve the stability of the retained austenite at room temperature. The volume fraction of austenite increases with the increase of the temperature of tempering and partitioning. From the results of the corrosion experiment, the corrosion resistance of 6Cr13 martensitic stainless steel first increases with the increase of heat treatment temperature. The best corrosion resistance is obtained at 400°C. Subsequently, the corrosion resistance decreased with the further increase in heat treatment temperature. The reason for the increase in corrosion resistance is that with the increase of heat treatment temperature, retained austenite's content gradually increases, enhancing the corrosion resistance. The decrease in corrosion resistance is related to the growth of retained austenite and carbide at high temperatures.

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“…It indicates a suppression of the anodic reaction rate after formation of a relatively stable and protective film over this specimen. [ 23 ] The corrosion current densities as obtained from the Tafel fitting of the polarization curves exhibit a decreasing trend with the higher extent of spheroidization (see Figure 3a), thus rendering the i corr values in a sequence of WR873K‐2H (2.10 μA/cm 2 ) < WR873K‐0H (6.03 μA/cm 2 ) < AR (10.91 μA/cm 2 ). This behavior could clearly be attributed to the microstructural modifications that have occurred due to the cementite spheroidization (see Figure 1).…”

Section: Resultsmentioning

confidence: 99%

Effect of spheroidized microstructure on the impact toughness and electrochemical performance of a high‐carbon steel

Bairagi

Munukuti

Bhuyan

et al. 2020

Materials & Corrosion

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The influence of cementite spheroidization on the impact toughness and electrochemical properties of a high‐carbon steel has been thoroughly investigated in this study. Heavy warm rolling, followed by 2 h of annealing, has resulted in near‐complete spheroidization, leading to a microstructure consisting of nano‐cementite globules dispersed in the ultrafine‐grained ferritic matrix. The Charpy impact test exhibited superior impact toughness with increased spheroidization. It is validated by the presence of abundant dimples in the fractographs of spheroidized specimens, in contrast to the as‐received one that experienced a brittle failure due to its lamellar pearlitic structure. Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) carried out in a 3.5% NaCl solution revealed that the corrosion resistance of the alloy gets improved with the increase in the degree of spheroidization. This is attributed to the lower susceptibility of the spheroidized specimen to microgalvanic corrosion owing to the minimum area of contact between nano‐spheroidized cementite and ferrite, as elucidated with the help of EIS results aided by equivalent electrical circuit model.

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Effect of Cr content on the passivation behavior of Cr alloy steel in a CO2 aqueous environment containing silty sand

Cited by 60 publications

References 47 publications

Microstructural analysis of martensitic hard surfacing on low chromium alloy steel

Microstructural analysis of martensitic hard surfacing on low chromium alloy steel

Corrosion resistance improvement in 6Cr13 martensitic stainless steel via quenching‐tempering and partitioning

Effect of spheroidized microstructure on the impact toughness and electrochemical performance of a high‐carbon steel

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