scholarly journals Corrosion wear characteristics of TC4, 316 stainless steel, and Monel K500 in artificial seawater

RSC Advances ◽  
2017 ◽  
Vol 7 (38) ◽  
pp. 23835-23845 ◽  
Author(s):  
Chen Jun
Keyword(s):  
Stainless Steel ◽  
Passive Film ◽  
Wear Track ◽  
Artificial Seawater ◽  
Corrosion Wear ◽  
Material Degradation ◽  
Wear Characteristics ◽  
316 Stainless Steel

Wear-induced corrosion can accelerate material degradation, and the passive film in the wear track is only partially destroyed.

Corrosion behavior of a new 25Cr-3Ni-7Mn-0.66 N duplex stainless steel in artificial seawater

2021 ◽  
Vol 63 (6) ◽  
pp. 505-511
Author(s):  
Songkran Vongsilathai ◽  
Anchaleeporn Waritswat Lothongkum ◽  
Gobboon Lothongkum
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Passive Film ◽  
Corrosion Behavior ◽  
Electrochemical Impedance ◽  
Melting Furnace ◽  
Artificial Seawater ◽  
Vacuum Arc ◽  
Significant Difference ◽  
Type Semiconductor

Abstract A new duplex 25Cr-3Ni-7Mn-0.66 N alloy was prepared in a vacuum arc re-melting furnace and characterized by metallographic and EPMA methods. Its corrosion behavior was investigated by potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and a Mott-Schottky (M-S) analysis in artificial seawater at room temperature and compared with those of super and normal commercial duplex stainless steel (SDSS and DSS). No significant difference in the open circuit potentials and pitting potentials was observed. Its passive film current density lies between those of SDSS and DSS. This was confirmed by EIS analysis. A pit attack was observed on the δ-phase for all duplex samples, because the PREN16 of the δ-phase was lower than that of the γ-phase. From the Mott-Schottky analysis, the passive films were found to be composed of bi-layer structures, a p-type semiconductor inner layer, and a n-type semiconductor outer layer. The degree of defect as well as the effect of nitrogen in passive film layer are discussed with respect to the point defect model.

Passivation behavior of 316L stainless steel in artificial seawater: effects of pH and dissolved oxygen

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Zhaopeng Wang ◽  
Yi Wang ◽  
Bowei Zhang ◽  
Zhan Zhang ◽  
Kui Xiao ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Dissolved Oxygen ◽  
Passive Film ◽  
Polarization Resistance ◽  
316L Stainless Steel ◽  
Ph Value ◽  
Artificial Seawater ◽  
Compositional Variation ◽  
Content Type ◽  
Semiconductor Properties

Purpose The purpose of this paper is to investigate the influence of the potential of hydrogen (pH) and dissolved oxygen in artificial seawater on the passivation behavior of 316L stainless steel. Design/methodology/approach The corrosion behavior was studied by using electrochemical measurements such as electrochemical impedance spectroscopy and polarization curve. The passive films were characterized with X-ray photoelectron spectroscopy. Findings The polarization resistance of the passive film decreases as the pH value drops ascribed to the formation of much more point defects. The donor carrier concentration (ND) in the passive film formed in the deaerated condition is lower than that in aerated conditions. Nevertheless, this phenomenon is the opposite when the pH value is 1 due to the significant decrease of Fe oxides/hydroxides coupled with the stable content of Cr oxides/hydroxides species. In addition, the compositional variation of the passive film also leads to the changes of its semiconductor properties from N-type to bipolar type. Originality/value This paper shows the variation of polarization resistance, corrosion potential, passive film composition and semiconductor properties with the pH value and dissolved oxygen. The results can serve as references to the further study on crevice corrosion of 316L in seawater.

Corrosion-wear behavior of 316L stainless steel under different applied potentials

2017 ◽  
Vol 69 (2) ◽  
pp. 234-240 ◽  
Author(s):  
Gaofeng Han ◽  
Pengfei Jiang ◽  
Jianzhang Wang ◽  
Fengyuan Yan
Keyword(s):  
Stainless Steel ◽  
Mass Loss ◽  
316L Stainless Steel ◽  
Wear Behavior ◽  
Synergistic Effects ◽  
Mass Loss Rate ◽  
Artificial Seawater ◽  
Corrosion Wear ◽  
Mechanical Wear ◽  
Content Type

Purpose This report aims to study the influence of applied potentials on the corrosion-wear behavior of 316L stainless steel (SS) in artificial seawater. Design/methodology/approach In this study, wear-corrosion behavior of 316L SS had been studied under different applied potentials in artificial seawater by using a reformed pin-on-disc test rig. The applied potentials were selected ranging from –1.2 to 0.3 V (vs Ag/AgCl). The friction coefficient, mass loss rate and current density were determined. Findings It was indicated that mass loss was determined by the combined effect of mechanical wear and chemical corrosion. The wear-corrosion process was synergistic effects dominate while mechanical wear contributed the major material mass loss. Practical implications The results helped us to choose the appropriate metals for application under the specified environment. Originality/value The main originality of this research is to reveal the corrosion-wear behavior of 316L SS under different potentials, which would help us to understand different states of 316L SS under different corrosion environments.

scholarly journals Decrease in Pitting Corrosion Resistance of Extra-High-Purity Type 316 Stainless-Steel by Cu2+ in NaCl

Metals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 511
Author(s):  
Takahito Aoyama ◽  
Hiroaki Ogawa ◽  
Chiaki Kato ◽  
Fumiyoshi Ueno
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Passive Film ◽  
Pitting Corrosion ◽  
High Purity ◽  
Film Formation ◽  
Bulk Solution ◽  
Potential Region ◽  
316 Stainless Steel ◽  
Pitting Corrosion Resistance

The effect of Cu2+ in bulk solution on pitting corrosion resistance of extra-high-purity type 316 stainless-steel was investigated. Pitting occurred in 0.1 M NaCl-1 mM CuCl2, whereas pitting was not initiated in 0.1 M NaCl. Although deposition of Cu2+ on the surface occurred regardless of a potential region in 0.1 M NaCl-1 mM CuCl2, Cu2+ in bulk solution had no influence on the passive film formation. The decrease in pitting corrosion resistance in 0.1 M NaCl-1 mM CuCl2 resulted from the deposited Cu or Cu compound and continuous supply of Cu2+ on the surface.

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