scholarly journals Protection of copper corrosion in acidic medium using pinostrobin

2018 ◽  
Vol 1 (2) ◽  
pp. 50
Author(s):  
Rosita Wati ◽  
Saprizal Hadisaputra ◽  
Dina Asnawati ◽  
Dhony Hermanto
Keyword(s):  
Weight Loss ◽  
Corrosion Rate ◽  
Acidic Medium ◽  
Inhibition Efficiency ◽  
Freundlich Isotherm ◽  
Copper Corrosion ◽  
Copper Surfaces ◽  
Weight Loss Method ◽  
Corrosion Inhibition Efficiency ◽  
Loss Method

The corrosion inhibition efficiency of copper was tested by the weight loss method in 1 M H2SO4 medium in the presence of pinostrobin as inhibitor. It shows that the addition of pinostrobin inhibitor reduce the corrosion rate. The nature of thermodynamic of pinostrobin adsorption on copper surfaces follows the Freundlich isotherm. The process of inhibition is endothermic, spontaneous and physisorption. It is proved by the Ea, ΔH and ΔS and ΔG values in which the thermodynamic studies show that the values of Ea < 80 kJ.mol-1, ∆H positive, ∆S positive, and ΔG < -20 kJ.mol-1.

scholarly journals Application of Organic Inhibitors to the Corrosion of Materials AISI 1070 Steel

2021 ◽  
Vol 2 (1) ◽  
pp. 12-20
Author(s):  
Destri Muliastri ◽  
Devi Eka Septiyani ◽  
Naufal Afif ◽  
Vania Tingting Sirenden ◽  
Januar Nur Rohmah Suprihartini
Keyword(s):  
Weight Loss ◽  
Fourier Transform ◽  
Corrosion Rate ◽  
Leaf Extract ◽  
Inhibition Efficiency ◽  
H2so4 Solution ◽  
Weight Loss Method ◽  
Organic Inhibitors ◽  
Loss Method ◽  
Mango Leaves

AISI 1070 steel is a material that has corrosion when it reacts with the environment. One way to inhibit the corrosion rate is by using organic inhibitors. The organic inhibitors used mango leaves and mango rinds with variations in the concentration of organic inhibitors of 0%, 6%, and 8%, respectively. This study aimed to determine the effectiveness of mango leaf extract and mango rinds as an inhibitor against the corrosion rate of AISI 1070 Steel. The extraction was carried out using the Maceration Method. Fourier Transform Infrared (FTIR), Potenzyodinamic, and Weight Loss tests were carried out in this study.  FTIR results show that both mango rinds and mango leaf have ingredients that were able to inhibit the corrosion rate, such as flavonoid functional groups including C – H, C = O, and C – O. Using the weight-loss method, the best corrosion rate was found in the mango rinds extract with a concentration of 8 mL, which was 31.784 mm/year with an inhibition efficiency of 92%. The highest corrosion rate was in 2M H2SO4 solution using potentiodynamic, without a mixture of inhibitors, that is 0.15589478 mm/year.

scholarly journals Studi Inhibisi Korosi Karboksimetil Kitosanpada Permukaan Baja Lunakdalam H2SO4

2014 ◽  
Vol 4 (1) ◽  
Author(s):  
Maria Erna ◽  
Herdini Herdini ◽  
Abdullah Abdullah ◽  
Suharmin Suharmin
Keyword(s):  
Weight Loss ◽  
Electron Microscope ◽  
Corrosion Inhibition ◽  
Inhibition Efficiency ◽  
Inhibition Mechanism ◽  
X Ray ◽  
Weight Loss Method ◽  
Corrosion Inhibition Efficiency ◽  
Loss Method ◽  
Scanning Electron

Abstrak Telah dipelajari efisiensi dan mekanisme inhibisi korosi karboksimetil kitosan (KMK) pada permukaan baja lunak dalam larutanH2SO4.Efisiensi inhibisi korosi ditentukan dengan menggunakan metode pengukuran berat hilang (Weight Loss Method), sedangkan mekanisme inhibisi korosi dipelajari berdasarkan hasil analisis karakterisasi Scanning Electron Microscope- Energy Dispersive X-ray(SEM-EDX). Hasil penelitian menunjukkan bahwa efisiensi inhibisi korosi KMK dalam H2SO4 mencapai 65.12%. Hasil analisis karakterisasi memperlihatkan mekanisme inhibisi KMK pada permukaan baja lunak melalui peristiwa adsorpsi kimia membentuk lapisan pasif berupa senyawa Fe-khelatmelalui unsur O dari gugus –OH dan N dari gugus –NH2 dari molekul KMK Kata kunci : Efisiensi inhibisi korosi, karboksimetil kitosan, mekanisme inhibisi   Abstract The corrosion inhibition efficiencyandmechanism ofcarboxymethylchitosan(CMC) on the surface ofmild steel in H2SO4 solution has studied. Determination of the corrosion inhibition efficiency measurement used Weight Loss Method (WLM), whereas the mechanism of corrosion inhibition studied based on the analysis characterizing Scanning Electron Microscope-Energy Dispersive X-ray (SEM-EDX). The results showed that the corrosion inhibition efficiency of CMC reaches 65.12%. Characterization analysis results showed inhibition mechanism CMC on mild steel surface through chemical adsorption events form a passive layer of Fe-chelate compounds through O elementof -OH group and N element of -NH2 group of molecules KMK. Keywords : corrosion inhibittion efficiency, carboxymethyl chitosan, inhibition mechanism

scholarly journals Synergistic and Antagonistic Effects of Sodium Molybdate-Zn2+System

2012 ◽  
Vol 9 (4) ◽  
pp. 1746-1752 ◽  
Author(s):  
J. Wilson Sahayaraj ◽  
A. John Amalraj ◽  
Susai Rajendran ◽  
N. Vijaya
Keyword(s):  
Aqueous Solution ◽  
Weight Loss ◽  
Inhibition Efficiency ◽  
Sodium Molybdate ◽  
Antagonistic Effect ◽  
Protective Film ◽  
Antagonistic Effects ◽  
Polarization Study ◽  
Weight Loss Method ◽  
Loss Method

The inhibition efficiency (IE) of sodium molybdate (SM) in controlling corrosion of carbon steel in an aqueous solution containing 120 ppm of Cl-, in the absence and presence of Zn2+has been evaluated by weight-loss method. A synergistic effect exists between SM and Zn2+when the concentration of Zn2+is 25 ppm and above. Inhibition efficiencies obtained are greater than 85%. Antagonistic effect exists between SM and Zn2+when the concentration of Zn2+is 10 ppm and below. The SM-Zn2+system shows excellent IE up to third day. Above third day IE decreases. Acceleration of corrosion takes place. Excellent IE is shown at pH 5,7 and 12. At pH 9, IE decreases since Zn2+is precipitated as Zn(OH)2in the bulk of the solution. Polarization study reveals that SM-Zn2+system functions as a mixed inhibitor. FTIR spectra reveal that the protective film consists of Fe2+-SM complex and Zn(OH)2.

Corrosion Behaviour of Aluminium Alloy in Palm Oil Methyl Ester (B100)

2012 ◽  
Vol 58 (2) ◽  
Author(s):  
W. B. Wan Nik ◽  
S. Syahrullail ◽  
R. Rosliza ◽  
M. M. Rahman ◽  
M. F. R. Zulkifli
Keyword(s):  
Weight Loss ◽  
Methyl Ester ◽  
Corrosion Rate ◽  
Aluminium Alloy ◽  
Palm Oil ◽  
Corrosion Behaviour ◽  
Corrosion Current ◽  
Electrochemical Test ◽  
Weight Loss Method ◽  
Loss Method

The aim of this study is to determine the corrosion effect of palm oil methyl ester (POME) on aluminium alloy 5083 (AA5083). The static immersion test was carried out at 60°C for 68 days according to ASTM G–31–72. The corrosion analysis was done by using weight loss method and electrochemical test. The result from weight loss method shows the decreasing in weight loss of AA5083 which signifies the ability of POME to reduce corrosion rate. The electrochemical test shows the decreasing in polarization resistance,Rp, while the corrosion current densities, Icorr, increase. The corrosion rate reduces from 2.250mpy to 0.1946mpy. The low concentration of fatty acid C18:2 and high anti oxidant element contributes to the reduction of corrosion rate of AA5083 in POME.

Inhibition of Aloe in Corrosion Experimental Research

2011 ◽  
Vol 233-235 ◽  
pp. 648-651
Author(s):  
Ai Jun Wei ◽  
Bei Feng ◽  
Xin Zhang ◽  
Fu Yong Huo
Keyword(s):  
Weight Loss ◽  
Corrosion Rate ◽  
Work Environment ◽  
Corrosion Inhibition ◽  
Corrosion Test ◽  
Inhibition Effect ◽  
Corrosion Medium ◽  
Different Temperatures ◽  
Weight Loss Method ◽  
Loss Method

In this corrosion test, simulated brine is used as corrosion medium, added different concentrations of aloe juice. Static weight-loss method is employed, meanwhile, we calculated corrosion rate of Q235 steel and researched on the corrosion inhibition effect of aloe in different temperatures. Results show that aloe is a good inhibitor, rate of corrosion inhibition can reach 80% or more and suitable for the temperature of work environment is less than 60 °C.

scholarly journals Microbial Corrosion of API 5L X-70 Carbon Steel by ATCC 7757 and Consortium of Sulfate-Reducing Bacteria

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Arman Abdullah ◽  
Nordin Yahaya ◽  
Norhazilan Md Noor ◽  
Rosilawati Mohd Rasol
Keyword(s):  
Weight Loss ◽  
Carbon Steel ◽  
Corrosion Rate ◽  
Sulfate Reducing Bacteria ◽  
Desulfovibrio Vulgaris ◽  
Corrosion Morphology ◽  
Sulfate Reducing ◽  
Weight Loss Method ◽  
Loss Method ◽  
Reducing Bacteria

Various cases of accidents involving microbiology influenced corrosion (MIC) were reported by the oil and gas industry. Sulfate reducing bacteria (SRB) have always been linked to MIC mechanisms as one of the major causes of localized corrosion problems. In this study, SRB colonies were isolated from the soil in suspected areas near the natural gas transmission pipeline in Malaysia. The effects of ATCC 7757 and consortium of isolated SRB upon corrosion on API 5L X-70 carbon steel coupon were investigated using a weight loss method, an open circuit potential method (OCP), and a potentiodynamic polarization curves method in anaerobic conditions. Scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS) were then used to determine the corrosion morphology in verifying the SRB activity and corrosion products formation. Results from the study show that the corrosion rate (CR) of weight loss method for the isolated SRB is recorded as 0.2017 mm/yr compared to 0.2530 mm/yr for ATCC 7757. The Tafel plot recorded the corrosion rate of 0.3290 mm/yr for Sg. Ular SRB and 0.2500 mm/yr forDesulfovibrio vulgaris. The results showed that the consortia of isolated SRB were of comparable effects and features with the single ATCC 7757 strain.

PENGARUH BASIC SEDIMENT AND WATER TERHADAP LAJU KOROSI PIPA X52 DAN A53 PADA MEDIA OIL SLUDGE.

ROTOR ◽  
2017 ◽  
Vol 10 (1) ◽  
pp. 13
Author(s):  
Naufan Arviansyah ◽  
Sumarji Sumarji ◽  
Digdo Listyadi Setyawan
Keyword(s):  
Weight Loss ◽  
Carbon Steel ◽  
Corrosion Rate ◽  
Low Carbon Steel ◽  
Measuring Method ◽  
Oil Sludge ◽  
Uniform Corrosion ◽  
Low Carbon ◽  
Weight Loss Method ◽  
Loss Method

This research have a purpuse to know corrosion rate in pipe X52 and A53 at oil sludge media caused BS and W. Corrosion is a damage of metal that occurs because reaction between metal with environtment and produce unwanted of corrosion product. Pipe X52 and A53 is a type of low carbon steel that use for fluid transportation system in industry. Oil sludge is a sediment of crude oil from main gathering storage and containing variouses elements. Oil sludge have a one of element is Basic Sediment and Water that is can make corrosion happen to distribution pipes. Measuring Method used in this research is weight loss method. The result of corrosion rate in Oil Sludge media containing 30,17% BS and W for pipe A53 is 1,64 x 10-2 mmpy and the result for pipa X52 is 2,47 x 10-2 mmpy. The result of corrosion rate in Oil Sludge media containing 60,67% BS and W for pipe A53 is 2,12 x 10-2 mmpy and for pipe X52 the result is 3,13 x 10-2 mmpy. The result of this research showed pipe A53 have more resistance than pipe X52. The corrosion is classified as uniform corrosion. Keywords : A53, Weight Loss, Oil Sludge, X52.

scholarly journals Synthesis of Water Soluble Chitosan Inhibitor from Shrimp Shells and its Corrosion Rate on Mild Steel in Acidic Solution

2021 ◽  
Vol 5 (1) ◽  
pp. 9
Author(s):  
Nur Layli Amanah ◽  
Ika Dyah Widharyanti ◽  
Agung Nugroho
Keyword(s):  
Corrosion Rate ◽  
Inhibition Efficiency ◽  
Low Carbon Steel ◽  
Water Soluble ◽  
Low Carbon ◽  
Shrimp Shell ◽  
Weight Loss Method ◽  
Shrimp Shell Waste ◽  
Loss Method ◽  
Increasing Temperature

<span>Synthesis of WSCI (Water Soluble Chitosan Inhibitor) </span><span>from shrimp shell waste is carried out through demineralization, deproteination, and deacetylation processes. WSCI is obtained from monomer termination and H<sub>2</sub>O<sub>2</sub> assistance. WSCI was characterized using Fourier Transform Infrared Spectroscopy (FTIR) and the degree of deacetylation was determined using the baseline method. The effect of adding WSCI to low carbon steel SS400 with a 1 M HCl corrosive environment was studied using the weight loss method at various concentrations and temperatures. The overall results of the research show that WSCI synthesis used in the prevention of corrosion have an inhibition efficiency of up to 74.6% at a concentration of 200 ppm at a temperature of 28<sup>o</sup>C. Inhibition efficiency and corrosion rate are known to increase with increasing WSCI concentration and corrosion rate decreasing with increasing temperature.</span>

scholarly journals Corrosion Inhibition of Bark Extract of Euphorbia royleana on Mild Steel in 1M HCl

2019 ◽  
Vol 40 ◽  
pp. 25-29
Author(s):  
Bishal Thapa ◽  
Dipak Kumar Gupta ◽  
Amar Prasad Yadav
Keyword(s):  
Weight Loss ◽  
Mild Steel ◽  
Corrosion Inhibitor ◽  
Inhibition Efficiency ◽  
Bark Extract ◽  
Potential Measurement ◽  
Maximum Inhibition ◽  
Weight Loss Method ◽  
Loss Method ◽  
Loss Experiment

The bark extract of Euphorbia royleana as a green corrosion inhibitor was studied in 1M HCl using weight-loss method and potential measurement. The results show that the bark extract of Euphorbia royleana is an effective anti-corrosion inhibitor of mild steel in acidic media. The corrosion rate decreases with the time of immersion. Weight loss experiment shows that the loss in weight decreases with the time of immersion and inhibition efficiency increases with the concentration of extract. It was observed that maximum inhibition efficiency is 99.60% in 100% concentration of extract. Potential measurement study shows that bark extracts act as a mixed type of inhibitor i.e. inhibits both anodically as well as cathodically. 

Inhibition of Corrosion of Carbon Steel by Resorcinol-Zn2+ System in Well Water

2015 ◽  
Vol 1 (2) ◽  
Author(s):  
Benita Sherine ◽  
A. Jamal Abdul Nasser ◽  
S. Rajendran
Keyword(s):  
Weight Loss ◽  
Carbon Steel ◽  
Inhibition Efficiency ◽  
Well Water ◽  
Protective Film ◽  
Zinc Ions ◽  
Immersion Period ◽  
Afm Analysis ◽  
Weight Loss Method ◽  
Loss Method

The inhibition efficiencies of inhibitor systems constituting various combinations of resorcinol and zinc ions in controlling corrosion of carbon steel immersed in well water have been evaluated by weight loss method. 75 ppm of zinc has 36% inhibition efficiency (Immersion period =7 days). When 100 ppm of resorcinol is added, the IE increases to 96%. The nature of the protective film formed on the metal surface has been analyzed by FTIR spectra, SEM and AFM analysis. The protective film is found to consist of Fe2+ - resorcinol complex and Zn(OH)2.

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