Study of hot corrosion of alloy 800 using linear polarisation resistance and weight loss measurement

This research discusses a detail optimization of Eucalyptus camaldulensis seeds extract as corrosion inhibitor for aluminum coupons in HCl using weight loss measurement and kinetic study. The result shows that the maximum inhibitor efficiency was obtained at a concentration of 2.0 (%W/V). However the highest inhibitor efficiency of 85% was obtained at 50ºC and the least inhibitor efficiency of 29% was obtained at 30ºC. Thermodynamic consideration revealed that adsorption of inhibitor of aluminum surface was exothermic and consistent with chemical adsorption mechanism.

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Adsorption behavior of tautomeric forms of 2-aminino-5-mercato-1,3,4 – thiadizole as corrosion inhibitor on copper surface

Anti-Corrosion Methods and Materials ◽

10.1108/acmm-01-2015-1483 ◽

2016 ◽

Vol 63 (6) ◽

pp. 452-460 ◽

Cited By ~ 2

Author(s):

Sang Xiong ◽

Jianlin Sun ◽

Yang Xu ◽

Xundong Yan

Keyword(s):

Weight Loss ◽

Corrosion Inhibitor ◽

Adsorption Energy ◽

Copper Surface ◽

Adsorption Behavior ◽

Weight Loss Measurement ◽

Content Type ◽

Loss Measurement ◽

Polar Groups ◽

Tautomeric Forms

Purpose The purpose of this study is to evaluate the effect of the four tautomeric forms of 2-amino-5-mercatpo-1,3,4-thiadizole (AMT) absorbed on copper surface by the polar or non-polar groups. Polar group of AMT is mostly electronegative with larger N and S atoms as central atoms. 5-amino-1,3,4-thiadiazole-2(3H)-thion (AMT-c) has the highest adsorption energy and is easy to react with copper. The interaction between AMT-c and copper conforms to chemisorption, which is to be further verified by the experiment on the weight loss measurement. Design/methodology/approach Adsorption behavior of AMT as corrosion inhibitor on copper surface in oil field was studied by weight loss measurement, and the corrosion inhibition mechanism was analyzed. Reactive sites and distributions of tautomeric forms of AMT as inhibitor on Cu(100) crystal plane were calculated by density functional theory. Findings All atoms of AMT are in the same plane, and AMT is an aromatic ring structure by large p-chain adsorbed on the metal surface by a plane configuration. AMT-c has the highest adsorption energy and also the most stable isomerized product. The determinate locations of AMT on the Cu(100) surface are the bridge and the hollow sites using molecular dynamics. Corrosion of copper can be effectively inhibited by AMT, which is a kind of excellent corrosion inhibitor, and this property is attributed to the polar groups and non-polar groups of AMT that play a role as absorption and shielding on copper surface, respectively. Inhibition efficiency is increased with the increase in the concentration of the inhibitor. The maximum efficiency of 92 per cent is obtained for 50 ppm AMT concentration at 373 K, which is attributed to the presence of extensively delocalized electrons of the phenyl rings, planarity and the presence of lone pair of electrons on N and S atoms, which favored a greater adsorption of inhibitors on copper surface. Originality/value Corrosion of copper can be effectively inhibited by AMT, which is a kind of excellent corrosion inhibitor, and this property is attributed to the polar groups and non-polar groups of AMT that play a role as absorption and shielding on copper surface, respectively. Adsorption of AMT as corrosion inhibitor on copper surface obeys Langmuir isotherm. The interaction between AMT and copper conforms to chemisorption, which is to be further verified by the experiment on the weight loss measurement.

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Adsorption Behavior and Inhibition of N,N-Diethylammonium O,O'-Dicyclohexydithiophosphate for Carbon Steel in Acid Medium

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.239-242.347 ◽

2011 ◽

Vol 239-242 ◽

pp. 347-351 ◽

Cited By ~ 2

Author(s):

Bin Xie ◽

Chuan Lai ◽

Li Ke Zou ◽

Xiang Mei Zeng ◽

Chun Huang ◽

...

Keyword(s):

Weight Loss ◽

Carbon Steel ◽

Standard Free Energy ◽

Weight Loss Measurement ◽

Free Energy Of Adsorption ◽

Loss Measurement ◽

Force Microscopy ◽

Carbon Steel Surface ◽

Microscopy Techniques ◽

Hcl Solution

The inhibition effect of N,N-diethylammonium O,O'-dicyclohexyldithiophosphate(NOCP) against the corrosion of carbon steel in HCl solution was studied by weight loss measurement, potentiodynamic polarization and atomic force microscopy techniques. The studies of weight loss measurement show that the inhibition efficiency was up to 99.54 % at the inhibitor concentration of 2.717×10-4 M in 1.0 M HCl solution at 25°C. The adsorption of NOCP on carbon steel surface obeys the Langmuir isotherm. Polarization curves indicate NOCP is a mixed-type inhibitor, and the obtained standard free energy of adsorption suggests that the chemisorption takes place spontaneously. The effects of temperature, acid concentration and immersion time were also studied.

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Synthesis and Inhibition Performance of Two Imidazoline Corrosion Inhibitors with Different Hydrophilic Groups

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.468-471.2478 ◽

2012 ◽

Vol 468-471 ◽

pp. 2478-2482 ◽

Cited By ~ 2

Author(s):

Guo Dong Fan ◽

Meng Ya Cui

Keyword(s):

Weight Loss ◽

Hydrochloric Acid ◽

Ir Spectrum ◽

Quaternary Ammonium ◽

Benzyl Chloride ◽

Corrosion Inhibitors ◽

Weight Loss Measurement ◽

Loss Measurement ◽

Inhibition Performance ◽

Maize Oil

Imidazoline quaternary ammonium salt (IM) was synthesized in this paper by maize oil, 2-(aminoethylamino) ethanol and benzyl chloride. Then it was modified by urea and thiourea to obtain IM-O and IM-S respectively. The products were analyzed with IR spectrum and 1HNMR spectrum. The corrosion inhibition performance of IM-O and IM-S was evaluated by weight-loss measurement of A3 steel in hydrochloric acid. The compare research in the concentrations of the corrosion inhibitor, the concentrations of hydrochloric acid, the temperature of pickling, the time of pickling and the concentrations of Fe3+ were done. The results show that the two compounds are good inhibitors for A3 steel and the IM-O has stronger corrosion inhibiting ability than IM-S.

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1-Butyl-3-Methylimidazolium Chloride Ionic Liquid as Inhibitor for Corrosion Protection of Mild Steel in Acidic Media

International Journal of Engineering & Technology ◽

10.14419/ijet.v7i4.14.27516 ◽

2019 ◽

Vol 7 (4.14) ◽

pp. 146

Author(s):

A A. Ahmad Tarmizi ◽

L Peter ◽

D Ahtoi ◽

R Yusof ◽

S N.A. Syed Ismail ◽

...

Keyword(s):

Weight Loss ◽

Ionic Liquid ◽

Mild Steel ◽

Sulphuric Acid ◽

Corrosion Protection ◽

Corrosion Performance ◽

Weight Loss Measurement ◽

Scanning Electronic Microscopy ◽

Acidic Media ◽

Loss Measurement

Corrosion inhibitor is a substance added to the corrosive environment in small quantities to reduce the corrosion a metal. The addition of inhibitors will reduce the corrosion rate of the metal by retarding the corrosion process on the metal surface. Thus, this study focused on the study of the effectiveness of 1- butyl-3-methylimidazolium chloride ([EMIM]Cl) ionic liquid as an inhibitor for corrosion protection of mild steel. Two different concentrations of [EMIM]Cl (0.05 M and 0.5 M) were tested into different concentrations of sulphuric acid (0.05M, 0.10 M, 0.15 M, 0.20 M and 0.25 M). Weight loss measurement was used to determine the effectiveness of the [EMIM]Cl as inhibitor for corrosion protection. Results showed that acid concentrations play an important role for the corrosion protection process in the presence of the inhibitor. The weight loss increases as the concentration of the acid increased. The study also revealed that the concentrations of [EMIM]Cl ionic liquid effect the performance of the inhibitor. From this study, 0.5 M of [EMIM]Cl ionic liquid shows better corrosion performance compared to 0.05 M of [EMIM]Cl. At 0.25 M of sulphuric acid, the weight loss of untreated metal increased drastically from 0.0075 g at 0.5 hour to 0.0974 g at 24 hours. After treated with 0.5 M of [EMIM]Cl, the weight loss measurement slightly increased from 0.0027 g at 0.5 hour to 0.0179 g at 24 hours. This weight loss value is lower compared to mild steel treated with 0.05 M [EMIM]Cl which is 0.0469 g at 24 hours. The performance of the inhibitor in two different type of acid was also investigated. The morphology of the untreated mild steel and mild steel treated with [EMIM]Cl was investigated by scanning electronic microscopy (SEM)

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The reaction of oxygen with silicon and germanium at elevated temperatures by weight loss measurement

Surface Science ◽

10.1016/0039-6028(70)90052-x ◽

1970 ◽

Vol 19 (2) ◽

pp. 435-442 ◽

Cited By ~ 6

Author(s):

R.F. Lever ◽

H.R. Wendt

Keyword(s):

Weight Loss ◽

Elevated Temperatures ◽

Weight Loss Measurement ◽

Loss Measurement ◽

Silicon And Germanium

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Corrosion Inhibitive Properties of 5-(4-Aminophenyl)-1,3,4-oxadiazole-2-thiol and 5-(4-Methylphenyl)-1,3,4-oxadiazole-2-thiol on Mild Steel in 1.0 M HCl Solution

Asian Journal of Chemistry ◽

10.14233/ajchem.2021.23394 ◽

2021 ◽

Vol 33 (12) ◽

pp. 2953-2964

Author(s):

Vikas Kalia ◽

Pradeep Kumar ◽

Suresh Kumar ◽

Hariom Dahiya

Keyword(s):

Weight Loss ◽

Electrochemical Impedance Spectroscopy ◽

Impedance Spectroscopy ◽

Mild Steel ◽

Electrochemical Impedance ◽

Charge Transfer Resistance ◽

Polarization Measurement ◽

Weight Loss Measurement ◽

Transfer Resistance ◽

Loss Measurement

The corrosion inhibition consequence of 5-(4-aminophenyl)-1,3,4-oxadiazole-2-thiol (APOT) and 5-(4-methylphenyl)-1,3,4-oxadiazole-2-thiol (MPOT) were accomplished by employing weight loss measurement, electrochemical impedance spectroscopy (EIS), potentiodynamic polarization measurement and scanning electron microscope (SEM). An impact of immersion time 12.0 h and different temperatures (298, 308 and 318 K) with solution of 1.0 M HCl, which include various concentration of inhibitor at the corrosion of mild steel were designed. Weight loss measurement showed that with enhancing the concentration of these studied inhibitors the percentage inhibition efficiency (IE%) enhances, but corrosion rate (CR) diminishes while reverse condition in case of temperatures change. The electrochemical impedance spectroscopy examine pointed out that the charge transfer resistance (Rct) values enhances and consequently the double layer capacitance (Cdl) values diminishes with rising each inhibitor concentration in 1.0 M HCl and also there is a formation of adsorption coating at the metal surface. Polarization measurement showed that both APOT and MPOT perform as mixed type corrosion inhibitors. Furthermore, the adsorption behaviour on surface of mild steel for each studied inhibitor results the Langmuir adsorption isotherm. Surface conduct of mild steel also designed through the SEM and energy dispersive X-ray (EDX) analysis and concludes that there is evolution of inhibitive film of APOT and MPOT on the surface of mild steel.

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Synergistic Inhibition of Sodium Molybdate and Sodium Silicate on Carbon Steel in KCl Media

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.887-888.731 ◽

2014 ◽

Vol 887-888 ◽

pp. 731-734

Author(s):

Yi Shun Cui ◽

Kang Quan Qiao ◽

Bin Huang

Keyword(s):

Weight Loss ◽

Carbon Steel ◽

Sodium Silicate ◽

Measurement Method ◽

Inhibition Efficiency ◽

Sodium Molybdate ◽

Weight Loss Measurement ◽

Polarization Method ◽

Loss Measurement ◽

Synergistic Inhibition

The Synergistic Corrosion Inhibition of of Sodium Molybdate and Sodium Silicate for Mild Steel in 5 % Kcl Solution at 25 °C was Investigated Using the Conventional Weight Loss Measurement Method and Potentiodynamic Polarization Method. the Obtained Results Show that Carbon Steel can be more Efficiently Protected by the Mixture of Sodium Molybdate and Sodium Silicate than Single Sodium Molybdate or Single Sodium Silicate in 5 % Kcl Solution at 25 °C. Tough the Concentrations of Single Sodium Molybdate or Single Sodium Silicate Reaches up to 1000mg/L, but their Inhibition Efficiencies are both under 74 %. however, when the Concentration of the Combined Inhibitor of Sodium Molybdate and Sodium Silicate is only 200 Mg/L its Inhibition Efficiency is still above 88 %.

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