scholarly journals PENGARUH PENAMBAHAN INHIBITOR ORGANIK EKSTRAK ECENG GONDOK TERHADAP LAJU KOROSI

2018 ◽  
Vol 2 (2) ◽  
Author(s):  
Nani Mulyaningsih ◽  
Catur Pramono ◽  
Ryan Try Prasetyo
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Rate ◽  
Corrosion Inhibitor ◽  
Research Method ◽  
Corrosion Inhibitors ◽  
Inhibitor Concentration ◽  
Eichornia Crassipes ◽  
Effect Of Inhibitors

One of the extracts of natural ingredients can be used as corrosion inhibitors is tannin and lignin in eichornia crassipes plants. The used extract eichornia crassipes as a corrosion inhibitor is very useful for the industrial. The aim of the study was to analyze the effect of inhibitors of eichornia crassipes on the corrosion rate of SIICHASE bolts. This research method by providing inhibitor solutions made from eichornia crassipes to SIICHASE bolt material by inhibitor concentrations of 0%, 9%, 12% and 15%, then tested for corrosion resistance in the seawater. The results showed that the addition of a 12% inhibitor concentration of eichornia crassipes produced the lowest corrosion rate of 10.852 mpy.

scholarly journals Ethanolamines as Corrosion Inhibitors for Zinc in (HNO3+H2SO4) Binary Acid Mixture

2010 ◽  
Vol 7 (2) ◽  
pp. 665-668 ◽  
Author(s):  
R. T. Vashi ◽  
H. M. Bhajiwala ◽  
S. A. Desai
Keyword(s):  
Corrosion Rate ◽  
Acid Concentration ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Corrosion Behaviour ◽  
Acid Mixture ◽  
Inhibitor Concentration

This work deals with the study of corrosion behaviour for zinc in (HNO3+ H2SO4) binary acid mixture containing ethanolamines. Corrosion rate increases with concentration of acid and temperature. At constant acid concentration, the inhibition efficiency of ethanolamines increases with the inhibitor concentration. Value of ΔGa increases and inhibition decreases with temperature. The mode of inhibition action appears to be chemisorption.

The RE Compound Using in Corrosion Inhibitor of Copper Alloy

2012 ◽  
Vol 549 ◽  
pp. 539-542
Author(s):  
Fang Xu ◽  
Shu Zhen Wu
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Inhibitor ◽  
Copper Alloy ◽  
Corrosion Inhibitors ◽  
Synergistic Effects ◽  
Salt Spray ◽  
Neutral Salt ◽  
Copper Corrosion ◽  
Sulfosalicylic Acid ◽  
Orthogonal Experiments

Based on neutral salt spray test and variance analysis, the RE salt compound using in the corrosion inhibitors of copper alloy has been studied. Synergistic effects among the RE salt, benzotriazole and sulfosalicylic acid were conducted through two orthogonal experiments. The results shows that the passive film has a better corrosion resistance after added RE salt,the synergistic effect is obvious in combined copper corrosion inhibitor.

scholarly journals Propargyl as Corrosion Inhibitor for Al-5%Si/15%SiC Composite in 0.5molar Sodium Hydroxide

2016 ◽  
Vol 11 (2) ◽  
pp. 141 ◽  
Author(s):  
F. Asuke ◽  
S.A. Yaro ◽  
O.B. Oloche
Keyword(s):  
Sodium Hydroxide ◽  
Corrosion Inhibitor ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Sodium Hydroxide Solution ◽  
Inhibitor Concentration ◽  
Corrosion Characteristic ◽  
Adsorption Free Energy ◽  
Mechanism Of Inhibition ◽  
Maximum Inhibition

The corrosion characteristic of Al-5%Si/15%SiC composite in 0.5molar sodium hydroxide solution (cauustic soda) using propargyl as corrosion inhibitors was investigated employing gravimetric and potential measurements. The research was carried out at different inhibitor concentrations, time and temperature rangges of 0.5 – 2.5% v/v, 1– 5 hours and 30 – 70 °C respectively. Results obtained revealed that propargyl is a moderate corrosion inhibitor for the composite, with maximum inhibition efficiency of 59.23% at 30 °C and inhibitor concentration of 1.5% v/v. Thermodynamic parameters such as heat of adsorption, free energy and activation energy were obtained from experimental data and the mechanism of inhibition was elucidated. The inhibitor is physically and chemically absorbed unto the surface of the composite.

scholarly journals Corrosion Study of Aluminum Alloy 3303 in Water-Ethylene Glycol Mixture: Effect of Inhibitors and Thermal Shocking

2019 ◽  
Vol 2019 ◽  
pp. 1-6 ◽  
Author(s):  
Mohammad Asadikiya ◽  
Yu Zhong ◽  
Mohammad Ghorbani
Keyword(s):  
Stainless Steel ◽  
Aluminum Alloy ◽  
Corrosion Rate ◽  
Ethylene Glycol ◽  
Mild Steel ◽  
Corrosion Inhibitors ◽  
Galvanic Corrosion ◽  
Aqueous Ethylene Glycol ◽  
Glycol Solution ◽  
Effect Of Inhibitors

Three types of corrosion inhibitors consisting of sodium diphosphate (Na2H2P2O7), sodium benzoate (NaC7H5O2), and sodium tetraborate (Na2B4O7) were evaluated to analyze their effectiveness to inhibit the aluminum alloy 3303 (UNS A93303) against corrosion, in water-ethylene glycol (C2H6O2) mixture. Potentiodynamic polarization tests were carried out to study the effect of each chemical. The temperature of solutions was 88°C and the aluminum samples were coupled with five other metals consisting of mild steel, stainless steel, brass, copper, and solder to include the effect of galvanic corrosion. The results showed that sodium diphosphate can effectively protect the aluminum alloy 3303 in comparison with two other chemicals. The effect of thermal shocking on the corrosivity of water-ethylene glycol solution was also investigated. It was indicated that the corrosivity of water-ethylene glycol solution increases because of thermal shocking, which oxidizes the aqueous ethylene glycol. The corrosion rate of aluminum alloy 3303 coupled with the five metals in thermal shocked water-ethylene glycol solution is 142 mpy, while it is 94 mpy in fresh water-ethylene glycol solution.

Stems as Natural, Green, Non-Toxic Corrosion Inhibitors

2021 ◽  
Author(s):  
Jun Hong Clarence Ng ◽  
Tariq Almubarak ◽  
Hisham A. Nasr-El-Din
Keyword(s):  
Corrosion Rate ◽  
Corrosion Inhibitor ◽  
Corrosion Inhibition ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Environmental Concerns ◽  
Base Case ◽  
Naturally Occurring ◽  
Corrosion Inhibition Efficiency ◽  
Acid Treatments

Abstract Corrosion during acid treatments causes severe damage to the tubulars and downhole equipment. Consequently, this leads to an increase in expenditure to maintain well production rates and well integrity. NACE estimates the cost of corrosion costs to be roughly 1.372 billion USD annually to the industry, making corrosion control extremely important. Therefore, corrosion inhibitors must be included in any acid treatment formulation. This work aims to develop environmentally friendly and non-toxic corrosion inhibitors that can work in the harsh oilfield conditions. Samples of 10 different stems were tested as sources of potential corrosion inhibitors. To determine the inhibition effectiveness of the different samples, N-80 coupons were exposed to 15 wt% HCl solutions at temperatures between 77-200 °F with 2 wt% of each sample for 6 hours. In addition, a control solution containing no corrosion inhibitor was used to establish a corrosion rate for a base case. At a concentration of 2 wt%, sample 1, 2, and 3 were found to perform the best, exhibiting 94.4% to 99.9% corrosion inhibition efficiency at 77°F. Sample 8 was observed to perform the worst with a corrosion inhibition efficiency of 57.3%. At 150°F, the corrosion rate of sample 1 was found to be 0.0275 lb/ft2, while that of sample 2 was 0.0171 lb/ft2. At this temperature, sample 3 did not perform well, exhibiting a corrosion rate of 0.155 lb/ft2 and thus was not tested at higher temperatures. At 200°F, the addition of a corrosion inhibitor intensifier resulted in a corrosion rate of 0.0136 lb/ft2 for sample 1 and 0.00878 lb/ft2 for sample 2. These results show that a naturally occurring, green, non-toxic corrosion inhibitor can be developed from these stems and can comfortably pass the industry requirement for low carbon steel. Currently used corrosion inhibitors are associated with environmental concerns and severe health risks. Recent developments in corrosion inhibition technology successfully tackled the environmental concerns, but still faces issues with toxicity and performance at high temperatures. The results in this work share two new naturally occurring, green, non-toxic, high-temperature stable corrosion inhibitors that can be developed from stems and can successfully protect the tubular during acid treatments.

scholarly journals Synthesis New Pyridinium Salts as Corrosion Inhibitors for Mild Steel in 1 M H2SO4

2021 ◽  
Vol 24 (2) ◽  
pp. 14-20
Author(s):  
Rania Kareem Hameed ◽  
◽  
Mehdi Salih Shihab ◽  
Keyword(s):  
Weight Loss ◽  
Free Energy ◽  
Corrosion Rate ◽  
Mild Steel ◽  
Corrosion Inhibitors ◽  
Organic Molecules ◽  
Inhibition Efficiency ◽  
Pyridinium Salts ◽  
Inhibitor Concentration ◽  
Pyridinium Bromide

Some new pyridinium salts, namely 4-(4-Chloro-benzylidene-hydrazinocarbonyl)-1-phenyl-pyridinium bromide, C1; 4-(4-Chloro-benzylidene-hydrazinocarbonyl)-1-butyl-pyridinium bromide, C2; 4-(4-Chloro-benzylidene-hydrazinocarbonyl)-1-phencyl-pyridinium bromide, C3; were synthesized and Corrosion inhibitors for mild steel were tested in a 1M H2SO4aqueous solution at 20ºC for 24 hours using weight loss measurements. The findings revealed that the inhibition efficiency of all pyridinium bromide derivatives converges at the maximum concentration. An increase in inhibitor concentration is associated with a decrease in corrosion rate, an increase in inhibition efficiencies, and an increase in surface degree of coverage. The physisorption effects for (C1, C2, and C3) were revealed by the free energy values of adsorption, which provided useful information for predicting the interaction between the metal surface and organic molecules as corrosion inhibitors.

scholarly journals PEMANFAATAN TEH SEBAGAI BIOINHIBITOR KOROSI PEGAS DAUN

2018 ◽  
Vol 2 (2) ◽  
Author(s):  
Nani Mulyaningsih ◽  
Sigit Mujiarto ◽  
Gyani Ubaydilah
Keyword(s):  
Corrosion Rate ◽  
Environmental Conditions ◽  
Corrosion Test ◽  
Corrosion Inhibitors ◽  
Environmentally Friendly ◽  
Antioxidant Compounds ◽  
Test Results ◽  
Inhibitor Concentration ◽  
Leaf Springs

Leaf springs, especially in cars, are one of the metal components that must get attention because their location under the vehicle causes susceptibility to corrosion due to environmental conditions. Corrosion is an absolute phenomenon that occurs in metals, but corrosion can be controlled by speed with certain techniques. One of them is the use of environmentally friendly corrosion inhibitors (bioinhibitors). Tea is known to have high antioxidant compounds, but its use is only limited as a drink ingredient. Starting from these problems, a study was conducted on the use of tea as a bioinhibitor in leaf pegs. This study use variations in inhibitor concentration (15%, 20%, 25%). To determine the corrosion rate a corrosion test was carried out. The test results showed that tea proved to be able to reduce the highest corrosion rate at concentration 25% in the amount of .37%. Corrosion rate before being given an inhibitor of 3.8195 mm / y and after being given inibitor decreased to 3.4614 mm / y.

Corrosion Inhibition of a Gas Sparged Copper Cylinder in a Solution of NaCl and Na2S by Using 4-Amino-4H-1,2,4-triazole as Corrosion Inhibitor

2016 ◽  
Vol 19 (3) ◽  
pp. 163-167
Author(s):  
Saad Said Al-Shahrani
Keyword(s):  
Activation Energy ◽  
Corrosion Resistance ◽  
Corrosion Rate ◽  
Corrosion Inhibition ◽  
Gas Flow ◽  
Inhibitor Concentration ◽  
Gas Velocity ◽  
Gas Flow Rate ◽  
Triazole Derivatives ◽  
Copper Cylinder

Most of previous investigations for corrosion inhibition of copper using triazole derivatives were carried out in stagnant conditions and mainly in presence either NaCl or Na2S. The main aim of this work is to investigate the performance of one of triazole derivatives namely, 4-Amino-4H-1,2,4-triazole (AHT) on improving the corrosion resistance of gas sparged copper parts in a solution comprised of NaCl and Na2S with different propotions. The potentiodynamic technique was used for investigating the effect of different variables on the corrosion rate of gas sparged copper such as gas velocity, initial S-2 concentration, gas sparged copper cylinder diameter, and initial AHT inhibitor concentration. The results show that the %improvement in corrosion resistance depends mainly on two main parameters, gas flow rate and amount of AHT inhibitor added. For lower gas velocities 0.07 cm/s the %improvement ranges from 6 to 22%, while for higher gas rate 0.35 cm/s it ranges from 2 to 7% depending on the amount of inhibitor added. The activation energy of the reaction was found to increase by approximately 20% by addition of the inhibitor up to 10ppm.

Seed Extracts as Natural, Green, Non-Toxic Corrosion Inhibitors

2021 ◽  
Author(s):  
Jun Hong Clarence Ng ◽  
Tariq Almubarak ◽  
Hisham A. Nasr-El-Din
Keyword(s):  
High Temperature ◽  
Corrosion Rate ◽  
Corrosion Inhibitor ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Environmentally Friendly ◽  
Base Case ◽  
Control Solution ◽  
Edible Seeds ◽  
Acid Treatments

Abstract Acid treatments are commonly used in the oilfield to remove inorganic scale or to stimulate formatio ns. These treatments typically consist of using hydrochloric acid (HCl), acetic acid, formic acid, or chelating agents. At elevated temperatures, these acids are highly corrosive and can cause severe damage to tubulars as well as downhole equipment. To reduce damage from these acids, corrosion inhibitors are added to the treatment solution. Corrosion inhibitors used in the oil and gas industry are typically quaternary amines or sulfur-containing compounds. These compounds adsorb to the surface of the metal, thereby reducing contact between the metal surface and the corrosive substance. However, these corrosion inhibitors are damaging to the environment and harmful to human health. Alternative new environmentally-friendly corrosion inhibitors are also either toxic to the human body or face performance limitations at higher temperature field applications. To develop new environmentally friendly and non-toxic corrosion inhibitors for high-temperature applications, 15 edible seeds were tested as alternative sources of corrosion inhibitors. In order to determine the inhibition effect of 15 different seeds, N-80 and S13Cr coupons were exposed to 15 wt.% HCl solutions at temperatures between 77-250°F with 2 wt.% of grounded seed added for 6 hours. In addition, a control solution containing no corrosion inhibitor was used to establish a corrosion rate for a base case. This paper will show the results of such seeds and attempt to provide an awareness of natural seeds extract for use as corrosion inhibitors in conjunction with well acid treatments. It was noted that out of the 15 seeds, seeds 1 and 2 were found to perform the best at these conditions, exhibiting more than 90% corrosion inhibition efficiency. Seed 4 was observed to perform the worst, exhibiting only 16.8% inhibition efficiency. At 150°F, 2 wt.% of seeds 1 and 2 were tested with seed 1 achieving a corrosion rate of 0.00253 lb/ft2 while seed 2 was unable to provide sufficient inhibition with a corrosion rate of 0.153 lb/ft2. The control solution was found to have a corrosion rate of 0.371 lb/ft2 over the 6 hours at 150°F. Seed 1 was further tested at 200°F with the addition of corrosion inhibitor intensifiers and resulted in a corrosion rate of 0.00087 lb/ft2, while at 250°F, a corrosion rate of 0.00811 lb/ft2 was observed. The tests using S13Cr also showed that seed 1 worked well as a corrosion inhibitor for CRAs. The thermal degradation of seed 1 was also examined using NMR. These results show a new naturally occurring, green, non-toxic, high-temperature applicable corrosion inhibitor that can be developed from edible seeds.

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