Rust layer growth and modification by a tannin-based mixture for lowering steel corrosion rates in neutral saline solution

2020 ◽  
Vol 55 (5) ◽  
pp. 372-380 ◽  
Author(s):  
Stojan Božović ◽  
Tena Gvozdanović ◽  
Ana Kraš ◽  
Veselinka Grudić ◽  
Stanislav Kurajica ◽  
...  
Keyword(s):  
Saline Solution ◽  
Steel Corrosion ◽  
Layer Growth ◽  
Rust Layer ◽  
Corrosion Rates

scholarly journals The effect of volatile organic acids and CO2 on the corrosion rate of carbon steel from a Top-of-Line-Corrosion (TLC) perspective

2021 ◽  
Vol 1201 (1) ◽  
pp. 012079
Author(s):  
S B Gjertsen ◽  
A Palencsar ◽  
M Seiersten ◽  
T H Hemmingsen
Keyword(s):  
Carbon Steel ◽  
Corrosion Rate ◽  
Organic Acid ◽  
Carbonic Acid ◽  
Acid Corrosion ◽  
Iron Concentration ◽  
Critical Factor ◽  
Steel Corrosion ◽  
Carbon Steels ◽  
Corrosion Rates

Abstract Models for predicting top-of-line corrosion (TLC) rates on carbon steels are important tools for cost-effectively designing and operating natural gas transportation pipelines. The work presented in this paper is aimed to investigate how the corrosion rates on carbon steel is affected by acids typically present in the transported pipeline fluids. This investigation may contribute to the development of improved models. In a series of experiments, the corrosion rate differences for pure CO2 (carbonic acid) corrosion and pure organic acid corrosion (acetic acid and formic acid) on X65 carbon steel were investigated at starting pH values; 4.5, 5.3, or 6.3. The experiments were conducted in deaerated low-salinity aqueous solutions at atmospheric pressure and temperature of 65 °C. The corrosion rates were evaluated from linear polarization resistance data as well as mass loss and released iron concentration. A correlation between lower pH values and increased corrosion rates was found for the organic acid experiments. However, the pH was not the most critical factor for the rates of carbon steel corrosion in these experiments. The experimental results showed that the type of acid species involved and the concentration of the undissociated acid in the solution influenced the corrosion rates considerably.

Corrosion Behavior of Al-Si-Cr-Cu Bearing Low Carbon Steel in A Cyclic Dry/Wet Laboratory Test

2009 ◽  
Vol 79-82 ◽  
pp. 1017-1020 ◽  
Author(s):  
Hui Shu Zhang ◽  
Dong Ping Zhan ◽  
Song Lian Bai ◽  
Zhou Hua Jiang
Keyword(s):  
Carbon Steel ◽  
Electrochemical Impedance ◽  
Low Carbon Steel ◽  
Optical Microscope ◽  
Low Carbon ◽  
Rust Layer ◽  
Electrochemical Behaviors ◽  
Corrosion Rates ◽  
The Matrix ◽  
Corrosion Behaviors

The corrosion behaviors of Al-Si-Cr-Cu bearing low carbon steel and a reference steel Q235 were tested in a cyclic dry/wet environment containing 0.01mol/L NaHSO3 in laboratory. Rust layers were observed by optical microscope (OM), scanning electron microscopy (SEM) and XRD. The electrochemical behaviors of the steels were studied on the polarization curves and electrochemical impedance spectroscopy (EIS). The results indicate that after 120h corrosion test, the annual corrosion rates of the designed steels reduce 42 % than Q235 at least. The corrosion products are generally iron oxyhydroxides and oxides such as FeOOH, γ-FeOOH, α-FeOOH, γ-Fe2O3, Fe3O4. The α-FeOOH possesses good stabilization mainly exits and can improve the corrosion resistance. There are the enrichments of Cu, Cr, Si and Al in the rust layer close to the matrix, which make the rust layer be more compact and protected. The corrosion currents of the two designed steels are lower than that of Q235, the corrosion potentials are higher than that of Q235 after Tafel fitting. The rust layer impedances of the designed steels are higher than that of Q235.

The Corrosion Behavior of a Low Carbon Bainite Steel in Simulated Atmosphere Environment Containing Chloride and/or Sulfide

2012 ◽  
Vol 217-219 ◽  
pp. 419-427
Author(s):  
Lei Cui ◽  
Shan Wu Yang ◽  
Jun Hua Kong
Keyword(s):  
Steel Corrosion ◽  
Weathering Steel ◽  
Low Carbon ◽  
Three Solutions ◽  
Corrosion Rates ◽  
Bainite Steel ◽  
Selective Corrosion ◽  
Corrosion Behaviors ◽  
Low Carbon Bainite ◽  
Atmosphere Environment

The corrosion behaviors of a low carbon bainite steel in three atmosphere environments simulated by corresponding solutions were investigated in this accelerated test. It is found that the corrosion rate of the low carbon bainite steel is lower than that of the commercial weathering steel 09CuPCrNi in all the three solutions. The corrosion rates of the bainite steel in the three solutions are also different, which is most serious in the solution containing both chloride and sulfide. There is no serious selective corrosion, for the corrosion has little effect on the mechanical property of the bainite steel. Corrosion rates are relation to the amount of Cu and Cr enrichment in rust layers, which are well corresponding to the specific surface area values of corrosion products. Inhibit effect can be found in the solution containing both chloride and sulfide.

scholarly journals DFT Calculations and Experimental Study to Inhibit Carbon Steel Corrosion in Saline Solution by Quinoline-2-One Derivative

2021 ◽  
Vol 18 (1) ◽  
pp. 0113
Author(s):  
Rehab Majid Kubba ◽  
Mustafa Alaa Mohammed ◽  
Luma S. Ahamed
Keyword(s):  
Carbon Steel ◽  
Density Functional ◽  
Adsorption Mechanism ◽  
Saline Solution ◽  
Physical Adsorption ◽  
Steel Corrosion ◽  
Equilibrium Geometry ◽  
Functional Theory ◽  
Carbon Steel Surface ◽  
Chemical Inhibition

A theoretical and protection study was conducted of the corrosion behavior of carbon steel surface with different concentrations of the derivative (Quinolin-2-one), namly (1-Amino-4,7-dimethyl-6-nitro-1H-quinolin-2-one (ADNQ2O)). Theoretically, Density Functional Theory (DFT) of B3LYP/ 6-311++G (2d, 2p) level was used to calculate the optimized geometry, physical properties and chemical inhibition parameters, with the local reactivity to predict both the reactive centers and to locate the possible sites of nucleophilic and electrophilic attacks, in vacuum, and in two solvents (DMSO and H2O), all at the equilibrium geometry. Experimentally, the inhibition efficiencies (%IE) in the saline solution (of 3.5%) NaCl were studied using potentiometric polarization measurements. The results revealed that the (%IE) for carbon steel corrosion by ADNQ2O is (89.88%). The obtained thermodynamic parameters support the physical adsorption mechanism. The adsorption followed the Langmuir isotherm. The surface change on carbon steel was studied using SEM (Scanning Electron Microscopy).

scholarly journals Bulk phase resource ratio alters carbon steel corrosion rates and endogenously produced extracellular electron transfer mediators in a sulfate-reducing biofilm

Biofouling ◽  
2019 ◽  
Vol 35 (6) ◽  
pp. 669-683 ◽  
Author(s):  
Gregory P. Krantz ◽  
Kilean Lucas ◽  
Erica L.- Wunderlich ◽  
Linh T. Hoang ◽  
Recep Avci ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Carbon Steel ◽  
Steel Corrosion ◽  
Bulk Phase ◽  
Extracellular Electron Transfer ◽  
Sulfate Reducing ◽  
Corrosion Rates

Kinetics of the Steel Corrosion in field waters

2008 ◽  
Vol 59 (4) ◽  
Author(s):  
Vasile Dumitrescu ◽  
Maria Moraru ◽  
Ileana Camenita ◽  
Ioan Viorel Branzoi ◽  
Alexandra Schiopescu
Keyword(s):  
Kinetic Equation ◽  
Natural Gas ◽  
Steel Corrosion ◽  
Corrosion Rates ◽  
Experimental Researches ◽  
Kinetics Of ◽  
Dynamics Process

This paper presents the experimental researches regarding the corrosion of some steel materials in field waters attending natural gas. The corrosion rates of tested steels are determined and the results are discussed. It is found that the dynamics process is described by an exponential kinetic equation.

Sign in / Sign up

Export Citation Format

Share Document