Corrosion Behavior and Morphology of Passive Films Modified with Zinc–Aluminum Simultaneous Treatment on Different Metals

Zhang, Shenghan; Sun, Chenhao; Di, Jie; Yu, Ting

doi:10.3390/met10080986

Cited by 4 publications

(2 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The analysis results of the M-S curve can obtain electronic distribution information such as the semiconductor characteristics of the passivation film and the carrier concentration distribution, which is of great significance for understanding the performance and formation mechanism of the passivation film. When the external potential causes the carrier concentration in the space charge layer of the passivation film to be in a depleted state, the relationship between the space charge layer capacitance Csc and the external potential E satisfies the M-S curve relationship [15,16]. By calculating the slope of the M-S curve, different types of semiconductors can be corresponded, with a positive slope for N-type semiconductors and a negative slope for P-type semiconductors.…”

Section: Resultsmentioning

confidence: 99%

Study on pitting behavior of HDR duplex stainless steel at different film-forming potentials

Lin,

Li,

Liu

et al. 2024

Phys. Scr.

View full text Add to dashboard Cite

The influence of external potentials on the electrochemical corrosion characteristics and pitting resistance of Low Carbon High Chromium (H), Duplex (D), Corrosion Resistant (R) duplex stainless steel after film formation was investigated by techniques such as dynamic potential scanning, constant potential polarization, Electrochemical Impedance Spectroscopy (EIS), conjunction with Scanning Electron Microscope (SEM) and Energy Dispersive Spectroscopy (EDS) analysis, were used to examine the effects of passivation potential and over-passivation potential on the pitting resistance of HDR duplex stainless steel, compared with naturally film-formed HDR corrosion resistance. Results show that in a 3.5% NaCl solution, the passivation range of HDR duplex stainless steel is 0~1.0 V, with certain current fluctuation appearing in the unstable pitting region around 1.0 V. As the film formation potential increases, the impedance first increases then decreases, and the carrier concentration first decreases then increases. At 0.9 V, the impedance is at its maximum, the carrier concentration is at its minimum, and the corrosion resistance is the best; at 1.2 V, the impedance is at its minimum, the carrier concentration is at its maximum, and the corrosion resistance is the worst; the natural film formation sample falls between 0.1 V and 0.7 V. After pitting tests, pitting mainly occurs at the ferrite structure and its boundaries for the naturally film-formed and film-formed potentials below 1.0 V samples, but pitting mainly occurs at the austenite structure and its boundaries in the 1.2 V film-formed sample, indicating a reversal of corrosion in the structural pitting. The sample with the film formation potential of 0.1 V developed many small pits on the surface after pitting test, which is related to the oxidation of Mo.

show abstract

Section: Resultsmentioning

confidence: 99%

Study on pitting behavior of HDR duplex stainless steel at different film-forming potentials

Lin,

Li,

Liu

et al. 2024

Phys. Scr.

View full text Add to dashboard Cite

show abstract

“…Similar findings were observed by other authors when studying stainless steel samples. 44,70,71 Composition of the oxide layer by ARXPS.-In order to confirm the hypothesis of the duplex native oxide layer, ARXPS measurements were run by modifying the take-off angle, avoiding any possible side effects or perturbation of the surface during the Ar ion sputtering in the depth profile experiments (e.g., inhomogeneous sputtering of the surface). Information of such oxide layers was obtained at different depths (the higher angle, the deeper analysed spot) using as obtained samples (without any previous sputtering).…”

Section: Resultsmentioning

confidence: 99%

Unravelling the Fe Effect on the Corrosion of Chromium Coatings: Chemical Composition and Semiconducting Properties

Leon

Pletincx

Terryn

et al. 2021

J. Electrochem. Soc.

View full text Add to dashboard Cite

A model trivalent chromium-based electroplating bath doped with different concentrations of Fe was used to obtain different metallic coatings. The impact of the Fe was investigated on both the Cr layer and its native passive film by a detailed characterisation using X-ray Photoelectron Spectroscopy (XPS), Angle Resolved XPS and Auger Electron Spectroscopy. Moreover, the semiconducting properties of their oxide layers were explored by Mott-Schottky and the corrosion performance of the coating by linear polarisation resistance and kinetics of the oxide formation. Results revealed not only a homogeneous Fe distribution in the Cr layer but also the presence of an iron-chromium duplex oxide layer for concentrations ≥ 100 mg l−1 Fe in the bath. The Mott-Schottky analysis showed a p-n junction for such coatings due to the presence of an iron oxide layer on top of a chromium oxide one, which increased the total amount of point defects (charge carrier density) and drastically affected to their corrosion resistance (the polarisation resistance decreased by one order of magnitude and their oxide layer showed slower kinetics and a higher passivation current). In contrast, coatings with a single chromium oxide layer showed a p-type semiconducting behaviour as well as the best corrosion performance.

show abstract

The Influence of Arc Welding Process on the Mechanical and Microstructural Characteristics of Low Carbon Steel in a Corrosive Environment

Omiogbemi

Faci

Gummadi

et al. 2022

Macromolecular Symposia

View full text Add to dashboard Cite

The study is fundamentally geared toward the investigation of the influence of Manual Metal Arc (MMA) welding on the mechanical and microstructural properties of low carbon steel immersed in a 0.5 M nitric acid environment having a pH of 0.3. The corrosion and mechanical behavior of the substrates are investigated prior to and after 336 h of immersion in the test environment. The outcome of the experiment shows that the structural integrity of the immersed substrates is affected due to corrosion in the test environment. Prior to immersion, the bending resistance is seen to decrease at the welded joints relative to the blank sample and then decrease further after immersion in the test solution respectively as 3.95, 3.53, and 4.21KN. Similarly, the tensile strength of the immersed substrate decreases as compared to the unexposed and blank samples; exposed to test environment (30.60%), welded unexposed to test environment (33.25%) and for the control sample (36.33%). Furthermore, the hardness value is observed to be higher at the heat‐affected zone (HAZ) of the test substrate than at the weldment and parent metal, respectively, as 11.3, 17.7, and 15.7HV. Optical micrographs prior to and after immersion have evidently revealed that heat input during welding has caused recrystallization leading to coarser grains at the HAZ.

show abstract

Corrosion Behavior and Morphology of Passive Films Modified with Zinc–Aluminum Simultaneous Treatment on Different Metals

Cited by 4 publications

References 53 publications

Study on pitting behavior of HDR duplex stainless steel at different film-forming potentials

Study on pitting behavior of HDR duplex stainless steel at different film-forming potentials

Unravelling the Fe Effect on the Corrosion of Chromium Coatings: Chemical Composition and Semiconducting Properties

The Influence of Arc Welding Process on the Mechanical and Microstructural Characteristics of Low Carbon Steel in a Corrosive Environment

Contact Info

Product

Resources

About