Performance of Potassium Metavanadate as a Low Carbon Steel Corrosion Inhibitor in Chloride and Sulfide Environment

2018 ◽  
Vol 7 (3) ◽  
pp. 828
Author(s):  
Isdiriayani Nurdin ◽  
R Asri Pratiwi ◽  
Aditya Farhan A ◽  
Fikri Anggara P ◽  
Rennie Sari

Inhibitor addition is one of the common corrosion control methods. Potassium metavanadate (KVO3) is the common corrosion inhibitor for Benfield solution in CO2 absorber. Former research shows that KVO3 is also able to inhibit the corrosion in seawater containing Sulphate Reducing Bacteria (SRB) due to its capacity as biocide. Chloride and Sulfide are common corrosive ions found in process fluids in industries. Therefore, this research is carried out to study the performance of KVO3 as a corrosion inhibitor for low- carbon steel in chloride and sulfide contaminated environment. The objective of this research was achieved by measuring low-carbon steel corrosion rate in various concentrations of contaminants. The corrosion rate was measured by Tafel method. The corrosion inhibition mechanisms were studied using cyclic voltammetry method. Meanwhile the corrosion products were identified by X - ray diffraction spectrometry (XRD). This research results that KVO3 is an effective corrosion inhibitor in chloride environment when the chloride concentration ranges between 20 g/L and 30 g/L. In this range of concentration, KVO3 performs more than 99% efficiency. While in sulfide environment, KVO3 is an ineffective corrosion inhibitor. On the other hand, the addition of KVO3 reduces the corrosion rate of carbon steel in seawater containing sulfide, although its performance does not meet the effective inhibitor criteria. Higher concentration of sulfide results the higher inhibition efficiency of KVO3.Keywords: Potassium metavanadate, low - carbon steel, corrosion inhibitor AbstrakPenambahan inhibitor merupakan salah satu metode pengendalian korosi. Kalium metavanadat (KVO3) sering digunakan sebagai inhibitor korosi pada absorber CO2 yang menggunakan larutan Benfield. Hasil penelitian sebelumnya menunjukkan bahwa KVO3 mampu menginhibisi korosi baja karbon rendah dalam air laut yang mengandung bakteri pereduksi sulfat (SRB) dengan bertindak sebagai biosida. Klorida dan sulfida merupakan ion-ion korosif yang umum ditemui dalam fluida proses di industri. Penelitian ini dilakukan untuk mempelajari kinerja KVO3 sebagai inhibitor korosi baja karbon rendah dalam lingkungan akuatik yang terkontaminasi klorida, ataupun sulfida. Untuk mencapai tujuan tersebut dilakukan pengukuran laju korosi baja karbon rendah dengan jenis dan konsentrasi kontaminan bervariasi. Pengukuran laju korosi dilakukan dengan metode Tafel. Mekanisme inhibisi diprediksi dengan metode voltametri siklik. Sedangkan produk korosi diidentifikasi dengan menggunakan spektrometri difraksi sinar X (XRD). Dari penelitian ini, diperoleh hasil bahwa KVO3 efektif sebagai inhibitor korosi baja karbon rendah pada lingkungan klorida berkonsentrasi antara 20 g/L hingga 30 g/L dengan efisiensi di atas 99%. Pada lingkungan sulfida, KVO3 kurang efektif menginhibisi korosi baja karbon rendah. Sedangkan pada air laut sintetik yang mengandung sulfida, walaupun belum termasuk kategori inhibitor efektif, namun KVO3 dapat menurunkan laju korosi baja karbon dengan efisiensi inhibisi yang meningkat seiring dengan kenaikan konsentrasi sulfida.Kata kunci: kalium metavanadat, baja karbon rendah, inhibitor korosi


2020 ◽  
Vol 4 (2) ◽  
Author(s):  
Puji Astuti Ibrahim

Carbon Steel 1018 is a low carbon steel having a carbon content (C) of 0.14-0.20% (<0.30% C). Low carbon steel is commercially known as mild steel. Corrosion is one way to prevent corrosion caused by the environment. Corrosion inhibitor are taken between the Crude Corrosion Inhibitor and Gas Corrosion inhibitor on Carbon Steel 1018 using the polarization method. Corrosion inhibitors work by making passive layers in the form of thin films or films on the surface of the material used as a barrier between metals and corrosive media. The analysis method used is polarization. Inhibition Efficiency Results obtained for Gas Corrosion Inhibitors (1A) at 10 ppm 96.86%, 20 ppm 59.74%, 30 ppm 74.48%. The Crude Corrosion Inhibitor (2A) results obtained inhibition efficiency for 10 ppm 99.57%, 20 ppm 77.69%, and 30 ppm 12.63%. The optimum value for the Gas Corrosion Inhibitor and Crude Corrosion Inhibitor is at 10 ppm at 96.86% and 99.57%. Keywords: carbon steel,crude corrosion inhibitor, corrosion , gas corrosion inhibitor, inhibitor


2021 ◽  
Vol 6 (13) ◽  
pp. 3199-3217
Author(s):  
Nurudeen A. Odewunmi ◽  
Mohammad A. J. Mazumder ◽  
Shaikh A. Ali

MRS Advances ◽  
2017 ◽  
Vol 2 (62) ◽  
pp. 3909-3915
Author(s):  
Héctor M. Barbosa Cásarez ◽  
Araceli Espinoza Vázquez ◽  
Francisco J. Rodríguez-Gomez

AbstractPhenylcoumarin glucoside (4-PC) is a compound extracted from the plant Hintona latiflora and was studied as inhibitor for AISI 1018 steel corrosion in 3% NaCl solution using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques, which may find application as eco-friendly corrosion inhibitors. The 4-PC provides inhibitor properties that protect AISI 1018 low carbon steel against corrosion at low concentrations (5 ppm) obtained by EIS. Polarization studies showed that the inhibitor was of mixed type. The inhibition efficiency by the two electrochemical techniques shows similar results. The inhibitor adsorption was demonstrated to be a combined process (physisorption and chemisorption) according to the Langmuir isotherm.


Author(s):  
Ya.G. Avdeev ◽  
◽  
A.V. Panova ◽  
T.E. Andreeva ◽  
Yu.I. Kuznetsov ◽  
...  

Corrosion of 08PS low-carbon steel was studied in a wide temperature range t = 25—100 °C in 1 M H2SO4 + 1 M H3PO4, 2 M H2SO4 и 2 M H3PO4, inhibited by the binary mixture IFKhAN-92 + KNCS (a molar ratio of components 9:1) and a three-component mixture IFKhAN-92 + KNCS + urotropine (9:1:400), in the presence of high concentrations of Fe(III) and Fe(II) salts, as well as in their joint presence. It is shown that under experimental conditions the corrosion inhibitors under study provide effective protection of steel in 1 M H2SO4 + 1 M H3PO4 even in the presence of Fe(III), Fe(II) salts or their mixtures. The highest protective effects are provided by a three-component inhibitor mixture. Under similar conditions in individual 2 M H3PO4 and, especially, 2 M H2SO4, the protective effects of inhibitors are lower. A stronger deceleration of steel corrosion by composite inhibitors based on IFKhAN-92 in H2SO4 + H3PO4 solutions containing Fe(III) salts in comparison with similar solutions of individual H2SO4, is largely due to the binding of Fe(III) cations by phosphate anions into complexes, that significantly reduces their chemical activity and, as a result the corrosion rate of steel.


2019 ◽  
Vol 3 (1) ◽  
pp. 263-276 ◽  
Author(s):  
Hameed B. Mahood ◽  
Asaad H. Sayer ◽  
Athraa H. Mekky ◽  
Anees A. Khadom

2019 ◽  
Vol 164 ◽  
pp. 240-248
Author(s):  
Abdualah Elhebshi ◽  
Ahmed El Nemr ◽  
Mohamed S. El-Deab ◽  
Ibrahim Ashour

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