Pitting Corrosion Resistance on Annealing Treated Super Duplex Stainless Steel S32750

Liu, Shuang; Yue, Chaohua; Chen, Xi; Zhu, Qiu-hua; Tu, Yiyou

doi:10.3390/cryst10040294

Cited by 8 publications

(3 citation statements)

References 28 publications

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“…In other words, the capacitive arc diameter represents the corrosion resistance of the material in solution, and it is assumed that the corrosion resistance increases as the diameter increases [55]. Large capacitive semicircular loops form a stable film on the sample surface, increasing resistance to pitting corrosion [56]. As seen in Figure 8, Nyquist plots are semicircular.…”

Section: Resultsmentioning

confidence: 99%

Heat Treatment, Microstructure and Corrosion Relationship on 316L SS Produced by AM

Özer

2023

Materials Science and Technology

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In this study, 316L stainless steel (SS) samples produced with standard parameters using the Additive Manufacturing method were heat treated with different parameters, and the effects of heat treatment on the microstructure, phase changes, hardness, porosity, and corrosion of the material were examined in detail. The results showed that the as-built microstructure of 316L stainless steel material produced by Additive Manufacturing deteriorated as the heat treatment temperature increased and the hardness decreased. The corrosion resistance of the material increased. The best corrosion resistance was obtained from heat treatment at 1150°C for 2 h.

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Section: Resultsmentioning

confidence: 99%

Heat Treatment, Microstructure and Corrosion Relationship on 316L SS Produced by AM

Özer

2023

Materials Science and Technology

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“…6(b)), an indication of a stable passive film formation. However, more passivity breakdown events are observed during the electrochemical passivation of the H 2 annealed surface, suggesting a slightly higher instability during the passive film formation before reaching a quasi-steady state [ 72 ].…”

Section: Discussionmentioning

confidence: 96%

Effect of Surface Preparation by High-Temperature Hydrogen Annealing on the Passivation of Ni-20 At.% Cr Alloy in Sulfuric Acid

Han

Neupane

Wang

et al. 2023

Preprint

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“…Icorr is an important parameter to evaluate the corrosion reaction kinetics. It is usually proportional to the corrosion rate of the material in the corrosion medium [10,11]. The smaller Icorr is, the lower the corrosion reaction rate is and the stronger the corrosion resistance of the material is.…”

Section: Polarization Curvementioning

confidence: 99%

Corrosion Behaviour of Cu/Carbon Steel Gradient Material

Gao

et al. 2021

Crystals

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Research on improving the corrosion resistance of carbon steel has become a hot topic in the iron and steel field in recent years. Copper plating on the surface of carbon steel is considered an effective means to improve its corrosion resistance, but the copper-plated carbon steel material prepared by this method has the problems of poor abrasion resistance, easy delamination of copper layer and similar issues, which affect the service performance of the copper-plated carbon steel material. To solve this problem, a new type of material whose surface is copper and the copper element is gradually diffused into carbon steel was developed by a plating-diffusion method, which is defined as a copper-carbon steel gradient material. Carbon steel with a copper plated surface and the Cu-Fe/carbon steel gradient material with 80% Cu content on the surface were prepared by the same method. The cross-sectional microstructure and composition of different samples were analysed, and the corrosion behaviors of samples in 3.5% NaCl solution were studied by the linear polarization curve method and electrochemical impedance spectroscopy. The cross-sectional microstructure result shows that the diffusion of copper in carbon is mainly carried out along its grain boundary, and the diffusion of copper will inhibit the growth of grains during heat treatment. As shown in the results of corrosion behaviors, there is no pitting corrosion in the corrosion process of all samples, as well as the stable passive film. All samples showed active dissolution. Compared with carbon steel, the corrosion potential of the Cu/carbon steel gradient material becomes more positive from −600 mV to −362 mV，the corrosion current density decreases from 53.0 μA/cm2 to 30.6 μA/cm2 and the radius of electrochemical impedance spectroscopy enlarges while the corrosion resistance is improved, and the corrosion resistance is mainly obtained by its surface copper layer. The corrosion resistance of Cu-Fe/carbon steel gradient material is lower than that of Cu/carbon steel gradient material, while it is still better than carbon steel, and it shows a clear passivation trend during corrosion. Therefore, the copper/carbon steel gradient material can significantly improve the corrosion resistance of carbon steel. Even after the surface copper layer is destroyed, the gradient material can protect the matrix and improve the service life of the material.

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Pitting Corrosion Resistance on Annealing Treated Super Duplex Stainless Steel S32750

Cited by 8 publications

References 28 publications

Heat Treatment, Microstructure and Corrosion Relationship on 316L SS Produced by AM

Heat Treatment, Microstructure and Corrosion Relationship on 316L SS Produced by AM

Effect of Surface Preparation by High-Temperature Hydrogen Annealing on the Passivation of Ni-20 At.% Cr Alloy in Sulfuric Acid

Corrosion Behaviour of Cu/Carbon Steel Gradient Material

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