Improved corrosion resistance of 316LN stainless steel performed by rotationally accelerated shot peening

Chen, Xudong; Li, Yusheng; Zhu, Yuntian; Bai, Yakui; Yang, Bin

doi:10.1016/j.apsusc.2019.03.256

Cited by 45 publications

(18 citation statements)

References 30 publications

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“…Zhang et al [16] found that in a saturated Ca(OH) 2 solution with and without Cl − , the micro-cracks in the surface layer of the supersonic fine-particles (about 3 µm) bombarding the low-carbon steel did not degrade its passivity properties and pitting resistance. The interesting work of Chen et al [17] proposed that stainless steel having underwent the RASP process showed a good corrosion resistance. However, the corrosion mechanisms of the nano-carbon steel and nano-stainless steel were very different.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Corrosion Resistance of SA106B Low-Carbon Steel Fabricated by Rotationally Accelerated Shot Peening

Lei

Chen

et al. 2019

Metals

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The corrosion resistance of a SA106B carbon steel with a gradient nanostructure fabricated by rotationally accelerated shot peening (RASP) for 5, 10, 15 and 20 min was investigated. Electrochemical tests were carried out in the 0.05 M H 2 SO 4 + 0.05 M Na 2 SO 4 and 0.2 M NaCl + 0.05 M Na 2 SO 4 solutions. The experimental results showed that the sample RASP-processed for 5 min exhibited the best corrosion resistance among them. TEM analysis confirmed that the cementite dissolution and formation of nanograins, which improved the corrosion resistance of the steel. Prominent micro-cracks and holes were produced in the samples when the RASP was processed for more than 5 min, resulting in the decrease of corrosion resistance.

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Section: Introductionmentioning

confidence: 99%

Enhanced Corrosion Resistance of SA106B Low-Carbon Steel Fabricated by Rotationally Accelerated Shot Peening

Lei

Chen

et al. 2019

Metals

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“…Under the corrosive circumstance, the recrystallized nanocrystalline materials with dense grain boundary but low distortion is favored by the diffusion of Cr, which provides more nucleation sites and adhesion work to form compact passive film [ 1 , 32 ]. On the other hand, recrystallization reduces the dislocation density and martensite content in surface layers, which improves the corrosion resistance by reducing the active sites and increasing the energy barrier of electrochemical reaction [ 44 , 45 ].…”

Section: Resultsmentioning

confidence: 99%

“…For stainless steel, a nanostructured surface layer processed by severe plastic deformation should contain dense dislocations and a large fraction of nano-martensite due to the activation of transformation-induced plasticity (TRIP) and defects accumulation [ 3 , 27 , 28 , 29 , 30 , 31 ]. Electrochemical corrosion tests revealed that nanostructured provide more nucleation sites, adhesion work and homogeneous capillary force to improve the compactness of passive film [ 1 , 32 , 33 , 34 ]. Such a positive passivation effect is favored for improving corrosion resistance.…”

Section: Introductionmentioning

confidence: 99%

Gradient Microstructure Design in Stainless Steel: A Strategy for Uniting Strength-Ductility Synergy and Corrosion Resistance

Wei

Wang

et al. 2021

Nanomaterials

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Martensite transformation and grain refinement can make austenitic stainless steel stronger, but this comes at a dramatic loss of both ductility and corrosion resistance. Here we report a novel gradient structure in 301 stainless steel sheets, which enables an unprecedented combination of high strength, improved ductility and good corrosion resistance. After producing inter-layer microstructure gradient by surface mechanical attrition treatment, the sheet was annealed at high temperature for a short duration, during which partial reverse transformation occurred to form recrystallized austenitic nano-grains in the surface layer, i.e., introducing extra intra-layer heterogeneity. Such 3D microstructure heterogeneity activates inter-layer and inter-phase interactions during deformation, thereby producing back stress for high yield strength and hetero-deformation induced (HDI) hardening for high ductility. Importantly, the recrystallized austenitic nano-grains significantly ameliorates the corrosion resistance. These findings suggest an effective route for evading the strength–ductility and strength–corrosion tradeoffs in stainless steels simultaneously.

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“…The outer hydroxides including Cr(OH)3 and FeOOH are easy to be penetrated and unprotective [13]. Cr2O3, Fe2O3, and FeO are main erosion-resisting oxides with O 2− [23]. As seen in Figure 12, there are more OH − and less O 2− in WM than in HAZ and BM.…”

Section: Discussionmentioning

confidence: 98%

“…The passive films of stainless steel consist of inner oxide layer and outer oxide particles. The inner oxide layer composed of Fe 2 O 3 and Cr 2 O 3 is critical to the corrosion resistance of stainless steel [23]. The outer hydroxides including Cr(OH) 3 and FeOOH are easy to be penetrated and unprotective [13].…”

Section: Discussionmentioning

confidence: 99%

The Pitting Corrosion Behavior of the Austenitic Stainless Steel 308L-316L Welded Joint

et al. 2020

Metals

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The pitting corrosion resistance of the austenitic stainless steel 308L-316L welded joint was investigated by electrochemical tests. It is found that the weld zone was the most critical for pits to initiate in the welded joint due to relatively instable passive film with few Mo and inhomogeneous passive film induced by multiple (Mn, Al, and Si) oxides and continuous network of 13.94 vol.% δ ferrites. By statistical analysis, 53.8% pits initiated at (Mn, Al, and Si) oxides, 23.0% in austenite, and 23.2% at interface between ferrite and austenite. In addition, heat-affected zone was prone to have pitting corrosion compared with the base metal since residual strain was much higher in the region.

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Improved corrosion resistance of 316LN stainless steel performed by rotationally accelerated shot peening

Cited by 45 publications

References 30 publications

Enhanced Corrosion Resistance of SA106B Low-Carbon Steel Fabricated by Rotationally Accelerated Shot Peening

Enhanced Corrosion Resistance of SA106B Low-Carbon Steel Fabricated by Rotationally Accelerated Shot Peening

Gradient Microstructure Design in Stainless Steel: A Strategy for Uniting Strength-Ductility Synergy and Corrosion Resistance

The Pitting Corrosion Behavior of the Austenitic Stainless Steel 308L-316L Welded Joint

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