The corrosion behaviour of SS 41 steel in formic and acetic acids

Sekine, Isao; Senoo, Kengo

doi:10.1016/0010-938x(84)90069-6

Cited by 27 publications

(6 citation statements)

References 6 publications

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“…316L SS has good corrosion resistance in strong reducing media such as dilute sulfuric acid solution and a mixture of acetic acid and formic acid at room temperature. However, as the temperature rises, passivation becomes unstable and the corrosion resistance decreases considerably [3][4][5]. The excellent corrosion resistance of SS is provided by the formation of an oxide layer of Cr 2 O 3 on the metallic surface of 316L SS [6,7].…”

Section: Introductionmentioning

confidence: 99%

Characterization of PTFE Film on 316L Stainless Steel Deposited through Spin Coating and Its Anticorrosion Performance in Multi Acidic Mediums

et al. 2020

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Polytetrafluoroethylene (PTFE) was coated on 316L stainless steel (SS) substrate through a spin coating technique to enhance its corrosion resistance properties in hydrochloric acid (HCl) and nitric acid (HNO3) medium. Scanning electron microscopy (SEM) revealed the morphology of the coated and uncoated substrates and showed a uniform and crack-free PTFE coating on 316L SS substrate, while a damaged surface with thick corrosive layers was observed after the electrochemical test on the uncoated sample. However, an increased concentration of HCl and HNO3 slightly affected the surface morphology by covering the corrosive pits. An atomic force microscope (AFM) showed that the average surface roughness on 316L SS and PTFE coating was 26.3 nm and 24.1 nm, respectively. Energy dispersive X-ray spectroscopy (EDS) was used for the compositional analysis, which confirmed the presence of PTFE coating. The micro Vickers hardness test was used to estimate the hardness of 316L SS and PTFE-coated substrate, while the scratch test was used to study the adhesion properties of PTFE coating on 316L SS. The anticorrosion measurements of 316L SS and PTFE-coated substrates were made in various HCl and HNO3 solutions by using the electrochemical corrosion test. A comparison of the corrosion performance of PTFE-coated substrate with that of bare 316L SS substrate in HCl medium showed a protection efficiency (PE) of 96.7%, and in the case of HNO3 medium, the PE was 99.02%, by slightly shifting the corrosion potential of the coated sample towards the anodic direction.

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Section: Introductionmentioning

confidence: 99%

Characterization of PTFE Film on 316L Stainless Steel Deposited through Spin Coating and Its Anticorrosion Performance in Multi Acidic Mediums

et al. 2020

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“…Although iron carbonate film formation mechanisms have been extensively studied using electrochemical techniques or weight loss method (Ref [10][11][12][13], the corrosion film formed in the presence of HAc has been scantily characterized. The study aims to investigate the characteristics of surface film, corrosion mechanisms, and electrochemical behavior by using both weight loss and electrochemical techniques, as well as by means of scanning electron microscopy (SEM), x-ray diffraction (XRD), energy dispersive spectroscopy (EDS), and x-ray photoelectron spectroscopy (XPS).…”

Section: Introductionmentioning

confidence: 99%

Film Characteristics of Carbon Steel in Simulant Solution with the Effect of Acetic Acid and CO2

Yin

Zhao

Lai

et al. 2009

J. of Materi Eng and Perform

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The work investigated the influence of acetic acid (HAc) on the corrosion behavior of carbon steel exposed to the simulant solution. The analysis methods such as scanning electron microscopy, x-ray diffraction, energy dispersive spectroscopy, and x-ray photoelectron spectroscopy were employed to systematically characterize the morphology and component of the corrosion film. The corrosion rate was calculated by weight loss and electrochemical methods. In addition, the corrosion behavior was further studied by using potentiodynamic polarization and electrochemical impedance spectroscopy. It was shown that the corrosion potential and current density increased with increasing the amounts of HAc. The HAc concentration has an important effect on the corrosion film and the corrosion mechanism.

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“…Formic acid, HCO 2 H, is the simplest carboxylic acid and, as such, is regarded to be fundamentally important as an intermediate in the oxidation of various hydrocarbons. − Recent interest has also focused on the possible role of HCO 2 H as an intermediate in the water-gas shift reaction in supercritical water − and as a component in wet-air oxidation . As an example of a simple carboxylic acid, HCO 2 H has been widely employed in prototypical studies of the formation and stability of intermediates on clean metal and metal oxide surfaces and for comparing the catalytic behavior of materials. − These latter studies may also be pertinent to the corrosion of stainless steel by formic acid. , …”

Section: Introductionmentioning

confidence: 99%

Spectroscopy of Hydrothermal Reactions. 10. Evidence of Wall Effects in Decarboxylation Kinetics of 1.00mHCO₂X (X = H, Na) at 280−330 °C and 275 bar

Maiella

Brill

1998

J. Phys. Chem. A

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Decomposition kinetics of 1.00 m formic acid and sodium formate to form CO2 (and H2) were probed under hydrothermal conditions of 280−330 °C and 275 bar. Flow reactor spectroscopy cells constructed from different metals (316 stainless steel, 90/10 Pt/Ir alloy, and grade 2 Ti) with diamond and sapphire windows were used to determine the rate of formation of CO2 in situ by IR spectroscopy. A single fluid phase was maintained. CO2 was produced at different rates depending on the metal and, in the case of 316 stainless steel, with a lot-dependent, concentration−time profile. The values of E a = 87−121 kJ/mol resemble those previously reported for surface- and H2O-catalyzed decarboxylation of formic acid. Much higher E a values are reported for unimolecular decomposition. Sodium formate decarboxylates more slowly than formic acid. In contrast to formic acid, the rate of decarboxylation of malonic acid in all of the cells is the same within error, which is consistent with a homogeneous unimolecular reaction.

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The corrosion behaviour of SS 41 steel in formic and acetic acids

Cited by 27 publications

References 6 publications

Characterization of PTFE Film on 316L Stainless Steel Deposited through Spin Coating and Its Anticorrosion Performance in Multi Acidic Mediums

Characterization of PTFE Film on 316L Stainless Steel Deposited through Spin Coating and Its Anticorrosion Performance in Multi Acidic Mediums

Film Characteristics of Carbon Steel in Simulant Solution with the Effect of Acetic Acid and CO2

Spectroscopy of Hydrothermal Reactions. 10. Evidence of Wall Effects in Decarboxylation Kinetics of 1.00mHCO₂X (X = H, Na) at 280−330 °C and 275 bar

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The corrosion behaviour of SS 41 steel in formic and acetic acids

Cited by 27 publications

References 6 publications

Characterization of PTFE Film on 316L Stainless Steel Deposited through Spin Coating and Its Anticorrosion Performance in Multi Acidic Mediums

Characterization of PTFE Film on 316L Stainless Steel Deposited through Spin Coating and Its Anticorrosion Performance in Multi Acidic Mediums

Film Characteristics of Carbon Steel in Simulant Solution with the Effect of Acetic Acid and CO2

Spectroscopy of Hydrothermal Reactions. 10. Evidence of Wall Effects in Decarboxylation Kinetics of 1.00mHCO2X (X = H, Na) at 280−330 °C and 275 bar

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Spectroscopy of Hydrothermal Reactions. 10. Evidence of Wall Effects in Decarboxylation Kinetics of 1.00mHCO₂X (X = H, Na) at 280−330 °C and 275 bar