Influence of Corrosion Inhibitor on Marine Concrete Corrosion Rate

2012 ◽  
Vol 446-449 ◽  
pp. 3508-3512
Author(s):  
Xian Ming Qin ◽  
Chao Yan ◽  
Yue Li ◽  
Juan Zhao
Keyword(s):  
Mechanical Properties ◽  
Reinforced Concrete ◽  
Corrosion Rate ◽  
Corrosion Inhibitor ◽  
Steel Corrosion ◽  
Polarization Method ◽  
Cement Ratio ◽  
Concrete Corrosion ◽  
Marine Concrete ◽  
Content Range

Corrosion inhibitor have a significant influence on corrosion rate of marine concrete. In this paper, linear polarization method is used in reinforced concrete that under marine environment, and reinforced concrete is mixed with corrosion inhibitor. The results show that: corrosion inhibitor has a little influence on the basic mechanical properties of reinforced concrete, and it can effectively improve the corrosion resistance ability of reinforced concrete. For reinforced concrete of the same corrosion inhibitor content, with the decline of water-cement ratio, the steel corrosion rate descends; in a certain content range , with the increase of corrosion inhibitor content, the corrosion rate of reinforced concrete decreases evidently.

Influence of Corrosion Inhibitor on Marine Concrete Corrosion Rate

2012 ◽  
Vol 446-449 ◽  
pp. 3508-3512
Author(s):  
Xian Ming Qin ◽  
Chao Yan ◽  
Yue Li ◽  
Juan Zhao
Keyword(s):  
Corrosion Rate ◽  
Corrosion Inhibitor ◽  
Concrete Corrosion ◽  
Marine Concrete

scholarly journals Application of Carboxymethyl Chitosan-Benzaldehyde as Anticorrosion Agent on Steel

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Handoko Darmokoesoemo ◽  
Suyanto Suyanto ◽  
Leo Satya Anggara ◽  
Andrew Nosakhare Amenaghawon ◽  
Heri Septya Kusuma
Keyword(s):  
Corrosion Rate ◽  
Corrosion Inhibitor ◽  
Daily Life ◽  
Steel Corrosion ◽  
Carboxymethyl Chitosan ◽  
Polarization Method ◽  
Gas Industry ◽  
Potentiostatic Polarization

Corrosion is one of the problems that is often found in daily life especially in petroleum and gas industry. Carboxymethyl chitosan- (CMC-) benzaldehyde was synthesized as corrosion inhibitor for steel. Corrosion rate was determined by potentiostatic polarization method in HCl 1 M. Dripping and coating, two different treatment, were used to drop and coat steel by CMC-benzaldehyde. The results showed that CMC-benzaldehyde could inhibit the corrosion rate of steel with concentration of 1 g, 3 g, 5 g, and 7 g in 60 mL of solvent. Coating steel with CMC-benzaldehyde with concentration of 7 g/60 mL of solvent and starch of 0.1 g/mL showed the highest efficiency to inhibit corrosion rate of steel. These treatments give corrosion efficiency of 99.8%.

Rhizophora apiculata Extract as Corrosion Inhibitor in 3.5% NaCl for API 5L Steel

2018 ◽  
Vol 791 ◽  
pp. 83-87
Author(s):  
Femiana Gapsari ◽  
Putu Hadi Setyarini ◽  
Andita N.F. Ganda
Keyword(s):  
Weight Loss ◽  
Fourier Transform ◽  
Corrosion Rate ◽  
Corrosion Inhibitor ◽  
Functional Groups ◽  
Inhibition Efficiency ◽  
Steel Corrosion ◽  
Polarization Method ◽  
Infra Red ◽  
Corrosion Inhibition Efficiency

The corrosion inhibition efficiency of Rhizophora acipulata(RA) extract was investigated for API 5L Steel corrosion in 3.5% NaCl using weight loss and polarization method. Fourier Transform Infra-Red (FTIR) was used toanalyze the characteristics of extract RA functional groups. The weight loss and polarization result indicated that extract RA inhibited API 5L steel corrosion rate. Based on the polarization result, the inhibition efficiency reached up 97.52% with addition 100ppm of RA extract.

Polypropylene Fibre Reinforced Concrete Air Permeability

1990 ◽  
Vol 211 ◽  
Author(s):  
Miguel A. Sanjuan ◽  
A. Moragues ◽  
B. Bacle ◽  
C. Andrade
Keyword(s):  
Carbon Dioxide ◽  
Reinforced Concrete ◽  
Steel Corrosion ◽  
Air Permeability ◽  
Polypropylene Fibre ◽  
Fibre Reinforced Concrete ◽  
Polypropylene Fibres ◽  
Cement Ratio ◽  
Reinforcing Steel Corrosion

AbstractThe permeability of concrete to gases is of direct importance to the durability of concrete structures, because of carbon dioxide flowing through the concrete favour lime carbonation and reinforcing steel corrosion.Mortar with and without polypropylene fibres having water/cementitious ratios of 0.30, 0.35 and 0.40 and a cement/sand ratio of 1/1 were studied. Polypropylene dosage varied from 0.1 to 0.3% by volume of cement.The characterization of mortar permeability was made using cylindrical shaped samples (3 cm height and 15 cm diameter). These specimens were 28 days cured and then dried before the test.The addition of fibres results in a decrease of air permeability. Variation of the water/cement ratio is of lesser importance than fiber addition.

Test and Study on Impact of Corrosion on Bond Force between Steel and Concrete

2010 ◽  
Vol 36 ◽  
pp. 176-181
Author(s):  
Xian Feng He ◽  
Shou Gang Zhao ◽  
Yuan Bao Leng
Keyword(s):  
Reinforced Concrete ◽  
Corrosion Rate ◽  
Concrete Structure ◽  
Steel Corrosion ◽  
Reinforced Concrete Structure ◽  
Bond Force ◽  
Steel Bars ◽  
Protection Layer ◽  
Corrosion Of Steel ◽  
The Impact

The corrosion of steel will have a bad impact on the safety of reinforced concrete structure. In severe cases, it may even be disastrous. In order to understand the impact of steel corrosion on the structure, tests are carried out to study corrosion and expansion rules of steel bars as well as the impact rules of corrosion on bond force between steel and concrete. The results show that wet and salty environment will result in steel corrosion; relatively minor corrosion will not cause expansion cracks of protection layers; when steel rust to a certain extent, it will cause cracks along the protection layer; when there exists minor corrosion in steel and the protection layer does not have expansion cracks, the bond force is still large and rapidly decreases as the corrosion rate increases.

Bearing Capacity of the Corrosion Reinforced Concrete Axial Compression Members

2012 ◽  
Vol 430-432 ◽  
pp. 1830-1833 ◽  
Author(s):  
Guo Ye Wang ◽  
Zhi Pan Wang ◽  
Yu Yin ◽  
Feng Chi Wang
Keyword(s):  
Reinforced Concrete ◽  
Corrosion Rate ◽  
Bearing Capacity ◽  
Axial Compression ◽  
Protective Layer ◽  
Steel Corrosion ◽  
Integral Model ◽  
Compression Members ◽  
Expansion Force ◽  
The Relationship

based on the relationship between steel rust expansion force and the amount of corrosion, regarding reinforced concrete as a general continuum with the use of integral model, the finite element analysis models of axial compressive members were set up. Concrete units cracking and crushing were considered by the methods of multi-axial stress William-Warnke five-parameter failure criteria and fracture dispersion mode. For axial compression corroded reinforced concrete structures, firstly under the action of rust expansion force produced by steel corrosion, cracks begin to occur around the steel, then column corner steel cracks emerge by the direction of the protective layer and progressively extend to the entire protective layer. With the increasing of the steel corrosion rate, the ultimate bearing capacity reduces. According to the relationship of the corrosion rate and the capacity reduction, a simple method of calculation was established for corrosion axis of the bearing capacity of compression members.

scholarly journals Kinerja kalium metavanadat sebagai inhibitor korosi baja karbon rendah dalam lingkungan klorida dan sulfida

2018 ◽  
Vol 7 (3) ◽  
pp. 828
Author(s):  
Isdiriayani Nurdin ◽  
R Asri Pratiwi ◽  
Aditya Farhan A ◽  
Fikri Anggara P ◽  
Rennie Sari
Keyword(s):  
Carbon Steel ◽  
Corrosion Rate ◽  
Corrosion Inhibitor ◽  
Low Carbon Steel ◽  
Chloride Concentration ◽  
Steel Corrosion ◽  
Low Carbon ◽  
Cyclic Voltammetry Method ◽  
The Common ◽  
Chloride Environment

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

Performance Evaluation of the Carbon Dioxide Corrosion Inhibitor IMC-1

2014 ◽  
Vol 490-491 ◽  
pp. 150-154
Author(s):  
Zhen Zhong Fan ◽  
Hui Ming An ◽  
Shu Yi Wang ◽  
Jun Feng Yang
Keyword(s):  
Carbon Dioxide ◽  
Corrosion Rate ◽  
Corrosion Inhibitor ◽  
Caprylic Acid ◽  
Acid Amide ◽  
Steel Corrosion ◽  
Electrode Reaction ◽  
Carbon Dioxide Corrosion ◽  
Electrochemical Polarization ◽  
N80 Steel

The carbon dioxide corrosion inhibitor IMC-1 was composed by caprylic acid amide polyoxyethylene ethers (n=4-5) and a small amount of the TX-10(5%). When the concentration was 200 mg/L, N80 steel corrosion rate was less than 0.125mm/a. With the CO2 partial pressure and temperature increased, N80 steel corrosion rate was decreased. From the electrochemical polarization curve, the adding corrosion inhibitor prevented the electrode reaction. The corrosion inhibitor IMC-1 was anodic inhibitor.

scholarly journals EXTRACT OF COCOR BEBEK (KALANCHOE PINNATA) AS A CORROSION INHIBITOR

2017 ◽  
Vol 6 (2) ◽  
pp. 112-116
Author(s):  
Tri Reksa Saputra ◽  
Agustinus Ngatin
Keyword(s):  
Carbon Steel ◽  
Corrosion Rate ◽  
Ethyl Acetate ◽  
Corrosion Inhibitor ◽  
Steel Corrosion ◽  
Metal Corrosion ◽  
Sharp Decline ◽  
Kalanchoe Pinnata ◽  
Rate Test ◽  
Corrosion Time

In this study, Cocor Bebek leaves (Kalanchoe pinnata) extract is studied for metal corrosion inhibitor. 10.3 kg of K. Pinnata leaves produce concentrated extract of methanol, n-hexane and ethyl acetate as much as 65.7442, 36.1452, and 15.2711 g respectively. The concentrated extracts were then used to determine the rate of corrosion. Corrosion rate test showed that extract of ethyl acetate can reduce corrosion rate of carbon steel in NaCl 3.5% from 2.954 mpy to 0.963 and 0.923 mpy using 500 ppm and 1000 ppm of extract consecutively. Corrosion rate of Cocor Bebek extract at addition of 500 ppm ethyl acetate in the solution of NaCl 3.5% is decreasing immediately. It was found that the carbon steel corrosion rate decrease as much 4.857 for 6 hours and continuously shows sharp decline until 24 hours of corrosion time. Corrosion rate is slowly decreasing till reach 1.694 mpy at corrosion time of 168 hours.

scholarly journals Investigation of pumpkin pod extract as corrosion inhibitor for carbon steel in HCl Solution

2020 ◽  
Vol 39 (1) ◽  
pp. 173-181
Author(s):  
A.O. Okewale ◽  
T. Adebayo
Keyword(s):  
Response Surface Methodology ◽  
Carbon Steel ◽  
Corrosion Rate ◽  
Corrosion Inhibitor ◽  
Response Surface ◽  
Steel Corrosion ◽  
Optimal Conditions ◽  
Extract Concentration ◽  
Process Factors ◽  
Hcl Solution

This work focused on the use of natural, and eco-friendly waste material as an inhibitor for inhibiting carbon steel corrosion. In order to obtain minimum rate of corrosion on carbon steel, optimization of the process factors that affect carbon steel corrosion was undertaken using the Response Surface Methodology (RSM). Three parameters were fluctuated viz; temperature, pumpkin pod extract concentration and time of exposure and their corresponding effects on rate of corrosion of carbon steel were ascertained. The data obtained was fitted to a model that is quadratic which was subsequently validated. The predicted lowest rate of corrosion by the model is 2.5427mm/yr with optimal conditions of 178.07ppm of pumpkin extract concentration, exposure time of 2.26hrs, and 35.28oC of temperature. The conditions were validated in three replicates and corrosion rate of 2.75mm/yr was obtained. Keywords: corrosion, optimization, pumpkin pod, response surface methodology.

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