scholarly journals Electrochemical Study of Stainless Steel Anchor Bolt Corrosion Initiation in Corrosive Underground Water

Processes ◽  
2021 ◽  
Vol 9 (9) ◽  
pp. 1553
Author(s):  
Fangping Ma ◽  
Qing Zeng ◽  
Xiangyu Lu ◽  
Tong Wu ◽  
Xiao Lu ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Open Circuit Potential ◽  
Ph Value ◽  
Underground Water ◽  
Open Circuit ◽  
Anchor Bolt ◽  
Underground Waters ◽  
Slope Engineering ◽  
Corrosion Initiation ◽  
Passive Current

Application of low-nickel stainless steel anchor was one of the economical and effective methods to solve the durability problem of slope engineering. At present, there are scarce reports about corrosion characteristics of low-nickel stainless steel in various underground waters. For investigating the corrosion initiation of stainless steel anchor bolt in corrosive underground water, the effect of SO42−, HCO3− and pH value on the corrosion behavior of 201 low-nickel stainless steel was studied via electrochemical methods. As the SO42− concentration, HCO3− concentration or pH value increase, the open circuit potential and polarization resistance increase, while the double-layer capacitance, donor density and passive current density decrease. The results indicate that corrosion is inhibited by SO42−, HCO3− and OH− in underground water. In addition, the inhibitive efficiency of SO42− and HCO3− increases with the SO42− and HCO3− concentration.

Experimental Study of Propagation Stage of Pitting Corrosion of 20Cr13 Steel

2008 ◽  
Vol 38 ◽  
pp. 238-247
Author(s):  
A.D. Davydov ◽  
V.S. Shaldaev
Keyword(s):  
Pitting Corrosion ◽  
Open Circuit Potential ◽  
Corrosion Potential ◽  
Ph Value ◽  
Open Circuit ◽  
Effect Of Temperature ◽  
Pitting Potential ◽  
Free Corrosion Potential ◽  
External Power Source ◽  
Corrosion Of Steel

The initiation and development of pitting corrosion of steel 20Cr13 in the NaCl solutions with various concentrations, temperatures, and pH values are studied under the potentiostatic conditions and at the free-corrosion potential. The pitting and repassivation potentials are determined using the method of cycling voltammetry. In spite of the fact that thus determined pitting potential is more positive than the corrosion potential (the open-circuit potential Eo.c.), the long-term experiments, which were performed at the free-corrosion potential, showed that pitting corrosion takes place without imposing a potential using an external power source. It is concluded that the probability of pitting corrosion of steel should be determined by comparing the corrosion potential (the open-circuit potential) with the repassivation potential Erp. Steel 20Cr13 is prone to the pitting corrosion, because Erp is more negative than Eo.c.. In the potentiostatic experiments, the variation of the depth and diameter of pits and their number with the time and the effect of temperature and electrode rotation on the pit propagation are studied. The results, which were obtained at the free-corrosion potential, are much less reproducible. In this case, in contrast to the potentiostatic conditions, the pit depth increased only slightly and the pit width increased to a larger extent. The effect of concentration, pH value, and temperature of NaCl solutions on the pit propagation is considered. It is concluded that the data on the development of pitting corrosion under the potentiostatic conditions can be hardly extended to the conditions of free corrosion potential.

scholarly journals From Waste to Valuable Resource: Lignin as a Sustainable Anti-Corrosion Coating

Coatings ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 454 ◽  
Author(s):  
Arman Dastpak ◽  
Kirsi Yliniemi ◽  
Mariana de Oliveira Monteiro ◽  
Sarah Höhn ◽  
Sannakaisa Virtanen ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Open Circuit Potential ◽  
Electrochemical Impedance ◽  
Steel Corrosion ◽  
Linear Sweep Voltammetry ◽  
Corrosion Current ◽  
Polymer Coatings ◽  
Open Circuit ◽  
Linear Sweep ◽  
Cyclic Potentiodynamic Polarization

In this study, a waste of biorefinery—lignin—is investigated as an anticorrosion coating on stainless steel. Corrosion behavior of two lignin types (hardwood beech and softwood spruce) was studied by electrochemical measurements (linear sweep voltammetry, open circuit potential, potentiostatic polarization, cyclic potentiodynamic polarization, and electrochemical impedance measurements) during exposure to simulated body fluid (SBF) or phosphate buffer (PBS). Results from linear sweep voltammetry of lignin-coated samples, in particular, demonstrated a reduction in corrosion current density between 1 and 3 orders of magnitude cf. blank stainless steel. Furthermore, results from cross cut adhesion tests on lignin-coated samples demonstrated that the best possible adhesion (grade 0) of ISO 2409 standard was achieved for the investigated novel coatings. Such findings suggest that lignin materials could transform the field of organic coatings towards more sustainable alternatives by replacing non-renewable polymer coatings.

Prediction and Measurement of Corrosion Rates of Stainless Steel in Concentrated Sulfuric Acid

CORROSION ◽  
10.5006/0709 ◽  
2013 ◽  
Vol 69 (6) ◽  
pp. 543-550 ◽  
Author(s):  
S. Jones ◽  
K. Coley ◽  
J. Kish
Keyword(s):  
Stainless Steel ◽  
Sulfuric Acid ◽  
Corrosion Behavior ◽  
Electrochemical Behavior ◽  
Open Circuit Potential ◽  
Electrochemical Techniques ◽  
Open Circuit ◽  
Corrosion Rates ◽  
Transient Nature ◽  
Concentrated Sulfuric Acid

When exposed to concentrated sulfuric acid, stainless steel exhibits unique electrochemical behavior. This behavior can be observed as an oscillation in open-circuit potential between the active and passive states. The transient nature of the corrosion behavior under these conditions results in a distinct challenge for measuring and predicting corrosion rates. Using a series of commercial alloys with various nickel contents, this paper outlines the utilization of electrochemical experimentation to refine the prediction of corrosion rates. The paper also discusses some of the difficulties associated with many traditional electrochemical techniques such as potentiodynamic scans when used for characterizing systems that undergo oscillations in open-circuit potential.

Influence of pH on the Electrochemical Bahavior of 00Cr15Ni7Mo2Cu2 Supermartensitic Stainless Steel in 3.5% NaCl Solutions

2012 ◽  
Vol 581-582 ◽  
pp. 1058-1061
Author(s):  
Jia Qun Rui ◽  
Jun Li ◽  
Hu Dai Sun ◽  
Kun Yu Zhao ◽  
Zhi Dong Li ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Open Circuit Potential ◽  
Electrochemical Impedance ◽  
Open Circuit ◽  
Pitting Potential ◽  
Supermartensitic Stainless Steel ◽  
Pitting Corrosion Resistance ◽  
Polarization Technique ◽  
Current Densities ◽  
Influence Of Ph

This objective is to study the influence of pH on the electrochemical behavior of 00Cr15Ni7Mo2Cu2 supermartensitic stainless steel in 3.5% NaCl solutions using potentiondynamic polarization technique, open circuit potential tests and electrochemical impedance spectroscopy (EIS).The study reveals that the pitting potential (Eb) is higher, the passivation current densities (ip) is lower and the electrochemical impedance increases with the pH. The results indicate that this stainless steel offer good pitting corrosion resistance with the pH increasing in 3.5% NaCl solutions.

Effect of photosynthetic biofilms on the open‐circuit potential of stainless steel

Biofouling ◽  
1992 ◽  
Vol 5 (4) ◽  
pp. 315-322 ◽  
Author(s):  
N J E Dowling ◽  
J Guezennec ◽  
J Bullen ◽  
B Little ◽  
D C White
Keyword(s):  
Stainless Steel ◽  
Open Circuit Potential ◽  
Open Circuit

scholarly journals Gold Nanoparticles Synthesis Using Stainless Steel as Solid Reductant: A Critical Overview

Nanomaterials ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 622
Author(s):  
Margherita Izzi ◽  
Maria C. Sportelli ◽  
Luciana Tursellino ◽  
Gerardo Palazzo ◽  
Rosaria A. Picca ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Stainless Steel ◽  
Open Circuit Potential ◽  
Precursor Solution ◽  
Cost Effective ◽  
Open Circuit ◽  
Steel Composition ◽  
Experimental Conditions ◽  
Synthesis Parameters ◽  
Critical Overview

Gold nanoparticles (AuNPs) were produced using stainless steel as a solid reductant to assist the synthesis of metal NPs, using HAuCl4 as a precursor. This method is very easy, quick, and cost-effective, allowing the synthesis of highly stable NPs without additional capping agents. However, the reaction mechanism is still under debate. In order to contribute to the investigation of the synthesis of AuNPs using stainless steel, different experimental conditions were tested. Cl− concentration, pH of the precursor solution, as well as stainless steel composition were systematically changed. The syntheses were performed recording the open circuit potential to potentiometrically explore the electrochemical properties of the system, under operando conditions. Spectroscopic and morphological characterizations were carried out along with potentiometric monitoring, aiming at correlating the synthesis parameters with the AuNPs characteristics. As a result, an overview of the process features, and of its most reasonable mechanism were obtained.

scholarly journals Corrosion Behavior of Some Timonb Alloys in Ringer Solution

2020 ◽  
Vol 71 (7) ◽  
pp. 187-196
Author(s):  
Maria Magdalena Pricopi ◽  
Romeu Chelariu ◽  
Nicolae Apostolescu ◽  
Doina-Margareta Gordin ◽  
Daniel Sutiman ◽  
...  
Keyword(s):  
Corrosion Behavior ◽  
Immersion Time ◽  
Open Circuit Potential ◽  
Electrochemical Impedance ◽  
Ph Value ◽  
Electrochemical Techniques ◽  
Ringer Solution ◽  
Open Circuit ◽  
Chemical Compositions ◽  
Solution Ph

The aim of this study was to investigate the influence of different process parameters as chemical composition, the pH value and immersion time on the corrosion of the some TiMoNb alloys, using different electrochemical techniques such as: cyclic voltammetry, open circuit potential (OCP) measurement, polarization curves and electrochemical impedance spectroscopy (EIS). The alloys were analyzed in the natural pH of the Ringer solution, but also with an acidic modification of the solution (ph = 4) and a basic modification (ph = 8). The more acidic values of pH, the more evident are differences between corrosion behavior of titanium-based alloys depending on their chemical compositions and immersion times.

scholarly journals Study of Erosion-Corrosion of Stainless Steel, Brass and Aluminum by Open Circuit Potential Measurements

2011 ◽  
pp. 13-17 ◽  
Author(s):  
Kazi Bayzid Kabir ◽  
Iqbal Mahmud
Keyword(s):  
Stainless Steel ◽  
Chemical Engineering ◽  
Open Circuit Potential ◽  
Measurement Techniques ◽  
Distinct Type ◽  
Electrochemical Measurement ◽  
Open Circuit ◽  
Corrosion Monitoring ◽  
Environment Interaction ◽  
Erosion Corrosion

The PDF for this article was replaced on 16/05/2011 with minor editorial changes. - EditorInfluence of flow on corrosion behavior of stainless steel, brass and aluminum was studied using electrochemical measurement techniques. Flow effect was identified by comparing erosion-corrosion with pure corrosion studies. For this purpose, open circuit potential (OCP) measurements were performed in both quiescent and flow conditions. OCP transient for the metals/alloys (stainless steel, brass and aluminum) indicated the nature and extent of corrosion on the sample by the environment (seawater and sodium carbonate). Three distinct type of curves were found for all metal-environment combinations. Increasing OCP indicated noble metal behavior while decrease in OCP indicated corrosion of material in the exposed environment. Directional shift in the OCP indicated changes in the surface phenomena. Hence, shape of these curves provides information about the extent of metal environment interaction. Experimental observations showed the applicability of open circuit measurements for on-line corrosion monitoring. Keywords open circuit potential; erosion-corrosion; electrochemical measurements; stainless steel; brass; aluminum. DOI: 10.3329/jce.v25i0.7234Journal of Chemical Engineering, IEB Vol. ChE. 25, No. 1, December 2010 pp.13-17

scholarly journals Adsorption of Some Allylic Compounds on Polarized 304 Austenitic Stainless Steel Electrodes in H2SO4 Solutions

1996 ◽  
Vol 13 (1) ◽  
pp. 31-47
Author(s):  
Hamid A. Al-Megren ◽  
Abdulaziz A. Al-Suhybani
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Open Circuit Potential ◽  
Inhibition Efficiency ◽  
Open Circuit ◽  
Rate Of Reaction ◽  
304 Austenitic Stainless Steel ◽  
Current Densities ◽  
Anodic Reactions ◽  
Steel Electrodes

The adsorption of different compounds containing the allylic group on 304 austenitic stainless steel (304SS) in H2SO4 solutions was investigated under different conditions. These include the effect of H2SO4 (1–12 M), temperature (5–45°C), inhibitor concentration [inhibitor] (10−610−1 M) and the effect of Cl− on the inhibition efficiency (%Ef). The dependence of the open circuit potential (OCP) on time as well as on the above-mentioned conditions was also investigated. The current densities (cds) for the cathodic and anodic reactions were reported under the specified conditions. Such additives were found to greatly reduce the rate of reaction and for the weak inhibitors the extent of adsorption is enhanced in the presence of Cl−. In addition, the kinetic parameters and thermodynamic functions were evaluated using appropriate equations.

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