Experimental Studies on Corrosion Behaviors of Casing Steel N80 in High Salinity of Brine

2014 ◽  
Vol 1081 ◽  
pp. 205-209
Author(s):  
Feng Lin ◽  
Ming Biao Xu ◽  
Yun Long Mu ◽  
Lei Wang
Keyword(s):  
Corrosion Inhibitors ◽  
High Salinity ◽  
Experimental Studies ◽  
Impact Factors ◽  
Operational Variables ◽  
Weight Loss Method ◽  
Corrosion Behaviors ◽  
Ion Contents ◽  
Loss Method ◽  
The Impact

Brine corrosion can remain a large obstacle to the rehabilitation project of Missan Oilfields in Iraq. To minimizecorrosion risks, the 13-3/8′′ casing steel, N80,has been employed to examine corrosion behaviors in simulated formation water (i.e., brine). The impact factors of corrosion such as temperature, ion contents, exposure time, and pH have been studied. Also, corrosion inhibitors available in brine have been screened by a static weight loss method. The results showed that effects of environmental and operational variables on N80 corrosion are fairly complicated; the corrosion inhibitor, HN-amph, exhibits excellent corrosion inhibition in brine. This work will provide important information for on-site application.

scholarly journals Characteristics Analysis and Corrosion Inhibition in Typical Produced Water of Jidong Oilfield

2021 ◽  
Vol 329 ◽  
pp. 01052
Author(s):  
Chen Dong
Keyword(s):  
Corrosion Inhibition ◽  
Water Samples ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Produced Water ◽  
Characteristics Analysis ◽  
Weight Loss Method ◽  
Ion Contents ◽  
Loss Method ◽  
Oilfield Water

The composition of oilfield water is complex and diverse. The development and application of corrosion inhibitors can effectively inhibit the corrosion of pipelines and equipment by oilfield water. The ions in produced water of Jidong Oilfield were determined by instrumental analysis and chemical analysis. Triazine prepared from ethanolamine and formaldehyde as corrosion inhibitor was evaluated by weight loss method. The corrosion inhibition experiments were carried out in ancient water samples, and the effects of concentration and temperature on corrosion inhibition were investigated. Finally, corrosion inhibitors were applied to the corrosion inhibition of produced water with different compositions in Jidong Oilfield, the corrosion inhibition of steel sheet was evaluated under different salinity conditions, and the effects of various ion contents in typical water samples and salinity on corrosion inhibition were analyzed. The experimental results show that the corrosion inhibition effect of triazine is better, and the product can be used in various water samples in oilfield with the inhibition efficiency above 85%.

Corrosion inhibition of stainless steel in sulfuric acid solution containing sulfide ions

2019 ◽  
Vol 66 (3) ◽  
pp. 360-368 ◽  
Author(s):  
Abou-Elhagag A. Hermas ◽  
Abobakr Mohamed Elnady ◽  
Reham M. Ali
Keyword(s):  
Stainless Steel ◽  
Corrosion Inhibitors ◽  
Electrochemical Impedance ◽  
Adsorbed Layer ◽  
Content Type ◽  
Positive Side ◽  
Efficiency Increase ◽  
Weight Loss Method ◽  
Loss Method ◽  
Sulfide Ions

Purpose Although stainless steel (SS) has good corrosion resistance in most aqueous solutions, it suffers corrosion in some solutions which contain aggressive ions such as sulfide ions. This study aims to use some cephalosporins (cefotaxime, cephapirin and cefazolin) as corrosion inhibitors of commercial SS in 0.5 M H2SO4 solution containing sulfide ions at 30°C. Design/methodology/approach The study was carried out using weight loss method, potential-time, linear polarization, potentiodynamic polarization, electrochemical impedance measurements, scanning electron microscopy, Fourier transform infrared and energy dispersive X-ray analysis. Findings The presence of the cephalosporin compound in the corrosive medium shifted the corrosion potential of SS to much positive side, which enhances self-passivation of SS, and the shifting increased with increasing inhibitor concentration. The cephalosporin compounds worked as effective inhibitors with mainly anodic and the efficiency increase as cefotaxime < cephapirin < cefazolin. The inhibitors form a protective adsorbed layer, which enriches the surface content of Ni and Cr and thus assists the SS to be passive. Originality/value The antibiotics cephalosporins could be used as effective corrosion inhibitors for SS in acidic solutions containing sulfide ions. The inhibitors enhances the the passive oxide film of SS even in presence of aggressive ions such as sulfide ions.

scholarly journals Coumarin-3-Amine as New Corrosion Inhibitor

2017 ◽  
Author(s):  
Ahmed Al-Amiery
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Mild Steel ◽  
Corrosion Inhibitor ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Spectroscopic Techniques ◽  
Synthetic Compounds ◽  
Weight Loss Method ◽  
Organic Inhibitors ◽  
Loss Method

Corrosion inhibitors are the natural or synthetic compounds that have the ability to inhibit the average of corrosion and reduce the damage of the mild steel. Enormous organic inhibitors nowadays employed in the corrosion domain but excluded due to costly. Comparatively cheap, and stable organic compound, namely 3-((4-nitrobenzylidene)amino)coumarin, have been utilized as an excellent corrosion inhibitor in hydrochloric acid for mild steel. The inhibition efficiency has been figured regarding to weight loss method. The corrosion inhibitor was identified according to spectroscopic techniques namely Fourier transform infrared and nuclear magnetic resonance in addition to micro-elemental analysis. Inhibition efficiency for the studied inhibitor was 71.4% that, at the highest studied concentration.

Study of the Erosion-Corrosion Behavior of P110, N80 and VM140 Steel in 3.5wt.%NaCl Solutions with Sand

2013 ◽  
Vol 683 ◽  
pp. 353-356 ◽  
Author(s):  
Yi Hua Dou ◽  
Yang Li ◽  
Zhi Guo Wang ◽  
Zhen Li
Keyword(s):  
Weight Loss ◽  
Impact Velocity ◽  
Fluid Velocity ◽  
Jet Impingement ◽  
Production Test ◽  
Experimental Conditions ◽  
Erosion Corrosion ◽  
Weight Loss Method ◽  
Loss Method ◽  
The Impact

With the development of hydraulic fracturing technology, the failure of the equipments during production test and completion well becomes more and more severe due to the behaviors of erosion-corrosion. In this paper, the erosion-corrosion behaviors of N80, P110 and VM140 materials were investigated with the jet impingement experimental device. The corrosive rate of these materials by the weight loss method was carried out under different flow velocities and jet angles. It was observed that the weight loss of the three materials is increased by the rising of the impact velocity. The relation of erosion-corrosion weight loss to impact velocity is well described as the equation E=KVn (E is the speed, V is fluid velocity, k and n are the fitting parameters). As a results, the resistance ability for corrosion-erosion under experimental conditions is P110>N80>VM140.

scholarly journals Synergistic effect of ZnO nanoparticles with organic compound as corrosion inhibition

2020 ◽  
Author(s):  
Buraq T Sh AL-Mosawi ◽  
Mohammed M Sabri ◽  
Muhanad A Ahmed
Keyword(s):  
Weight Loss ◽  
Mild Steel ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Corrosion Process ◽  
Zno Nps ◽  
Weight Loss Method ◽  
Steel Surfaces ◽  
Loss Method ◽  
Isatin Derivative

Abstract In chemical manufactures, the corrosion inhibitors were added in order to reduce the corrosion of mild steel. Chemical molecules are often used on mild steel surfaces as portion of the latest finishing steps before painting and/or storage. Here, this work elucidated the utilization of an isatin derivative, namely, 3-((3-acetylphenyl)imino)indolin-2-one synergistic with zinc oxide nanoparticles for improving the impedance of mild steel (MS) against corrosion in 1.0 M hydrochloric acid using the weight loss method and scanning electron microscopy (SEM). Weight loss measurements demonstrated that the best 3-((3-acetylphenyl)imino)indolin-2-one concentration was 0.5 mM and the inhibition efficiency was 83% whereas the inhibition efficiency was 92% with addition of ZnO NPs. 3-((3-Acetylphenyl)imino)indolin-2-one retards the corrosion process at 300 K and demonstrates low inhibition efficiencies at 310, 320 and 330 K.

scholarly journals Organic Phosphorus Compounds as Inhibitors of Corrosion of Carbon Steel in Circulating Cooling Water: Weight Loss Method and Thermodynamic and Quantum Chemical Studies

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Liang Liu ◽  
Ting-Ting Cao ◽  
Qi-Wei Zhang ◽  
Chong-Wei Cui
Keyword(s):  
Carbon Steel ◽  
Corrosion Inhibition ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Organic Phosphorus ◽  
Cooling Water ◽  
Circulating Cooling Water ◽  
Weight Loss Method ◽  
Corrosion Inhibition Efficiency ◽  
Loss Method

Circulating cooling water plays an important role in industrial water use. In this study, the corrosion inhibition effects of PBTCA, HEDP, and ATMP organic phosphorus inhibitors were investigated using the weight loss method by varying the dosage of inhibitors, ClO2 concentrations, and pH values on carbon steel in recirculating cooling water with a low concentration of ClO2 solution. The results showed that the three corrosion inhibitors had a satisfactory corrosion inhibition effect and that corrosion inhibition efficiency is positively correlated with the concentration of organic phosphorus inhibitors and pH. The average corrosion inhibition efficiency of the three inhibitors was about 80% at the concentration of inhibitors = 35 mg/L, pH = 9.0, and the concentration of ClO2 = 7.0 mg/L, of which the single-phosphorus molecular corrosion inhibitor proved to be the best inhibitor. When the ClO2 concentration was 7 mg/L, the corrosion inhibition efficiencies of the three corrosion inhibitors were relatively stable. Using the density functional theory (DFT) algorithm in the Gaussian 09 program, the optimization calculation was completed by the B3LYP/6-31G (d, p) method at the microlevel. The molecular structures of the three organic phosphorus inhibitors and the number of phosphorus-containing atoms were compared to the sustained-release properties. Organic phosphorus inhibitors, as an electronic buffer, not only provided electrons but also received electrons. They formed a complex with iron and zinc ions in water in order to attach to the surface of the carbon steel and to alleviate corrosion. In addition, the adsorption with a metal surface followed the Langmuir adsorption isotherm.

Effect of H2S/CO2 Pressure on the Corrosion Behaviors of L360QCS in the Environments Containing Elemental Sulfur

2011 ◽  
Vol 399-401 ◽  
pp. 185-188
Author(s):  
Shu Qi Zheng ◽  
Chang Feng Chen ◽  
Li Qiang Chen ◽  
Chun Yu Li
Keyword(s):  
Weight Loss ◽  
High Pressure ◽  
Corrosion Rate ◽  
Elemental Sulfur ◽  
Rate Increase ◽  
Partial Pressures ◽  
Weight Loss Method ◽  
Corrosion Behaviors ◽  
Loss Method ◽  
Xrd Techniques

The weight-loss method was used to study the effect of H2S/CO2 pressure on the corrosion behaviors of L360QCS in the environments with the existence of elemental sulfur and H2S/CO2. The morphologies, compositions and structure of corrosion products formed at different partial pressures were studied by the means of SEM, EDS and XRD techniques. The results show that the existing of H2S/CO2 increases the corrosion rate sharply and the corrosion rate increase dependence on H2S/CO2 pressure. At low gas pressure the production is mainly cubic FeS crystal while that is square FeS crystal at high pressure.

Study on Optimal Ratio of Compound Corrosion Inhibitors for Reinforcing Steel

2014 ◽  
Vol 507 ◽  
pp. 245-248
Author(s):  
Yi Jiang ◽  
Chao Yi Zheng ◽  
Jun Zhe Liu
Keyword(s):  
Weight Loss ◽  
Sodium Nitrite ◽  
Corrosion Inhibitors ◽  
Pore Solution ◽  
Protective Film ◽  
Obvious Effect ◽  
Optimal Ratio ◽  
Coordination Effect ◽  
Weight Loss Method ◽  
Loss Method

In this paper, the anticorrosive effects of two types of corrosion inhibitors (anodic inhibitors and cathodic inhibitors) on rebars immersed in the simulated concrete pore solution with 3.5%( wt) NaCl were studied by the static weight loss method . The results are as following: firstly, all of the inhibitors had an anticorrosive effect on the rebars and sodium nitrite performed best. Besides, the higher the concentration, the more obvious effect .Secondly, diethanolamine had the best performance in the cathodic inhibitors. Thirdly, sodium nitrite had a good coordination effect with diethanolamine instead of being used alone. In this way, it can exist synergy and reduce the activity of cathode and anode by the formation of consecutively protective film on the surface of the rebars.

An Analytical Procedure for Testing the Effectiveness Of Hydrogen Sulfide Corrosion Inhibitors

CORROSION ◽  
1959 ◽  
Vol 15 (6) ◽  
pp. 37-40
Author(s):  
DONALD W. SHANNON ◽  
JAMES E. BOGGS
Keyword(s):  
Weight Loss ◽  
Hydrogen Sulfide ◽  
Corrosion Inhibitors ◽  
Analytical Procedure ◽  
Dynamic Weight ◽  
Large Numbers ◽  
Sulfide Corrosion ◽  
Weight Loss Method ◽  
Loss Method ◽  
Hydrogen Sulfide Corrosion

Abstract A new method is proposed as a standard screening test for possible hydrogen sulfide corrosion inhibitors. This is a dynamic, weight-loss method which attempts to control conditions sufficiently well that substances which offer promise of being effective inhibitors under field conditions can be selected for further study. The test is cheap and simple, so that it can be run economically by a relatively untrained technician on large numbers of materials. The method is described and the reasons for choosing the particular conditions are explained. Then illustrations of the application of the procedure to a number of types of inhibiting substances are presented. 2.3.4

Study on Corrosion Inhibition of Compound Corrosion Inhibitor of Molybdate in Seawater

2012 ◽  
Vol 581-582 ◽  
pp. 755-758
Author(s):  
Ying Li Wei ◽  
Ya Qiang Tian ◽  
Yue Hua Wang ◽  
Xiao Hong Yang
Keyword(s):  
Weight Loss ◽  
Carbon Steel ◽  
Corrosion Inhibitor ◽  
Corrosion Inhibition ◽  
Corrosion Inhibitors ◽  
Electrochemical Polarization ◽  
Quaternary Compound ◽  
Weight Loss Method ◽  
Loss Method ◽  
Inhibition Performance

The corrosion inhibition performance of molybdate and molybdate compound corrosion inhibitor of carbon steel in seawater were tested using weight loss method, electrochemical polarization curve, and the quaternary compound molybdate corrosion inhibitor were made sure through the experiments. The experiment results show that the compound corrosion inhibitors have obvious synergistic corrosion inhibition effects in the proportion of 40 mg/L molybdate, 10mg/L HEDP, 4mg/L Zn2+ and 50 mg/L glucose acid salts.

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