Corrosion Inhibition of Heat Treated Mild Steel With Neem Leave Extract in a Chloride Medium

Tuaweri, Tolumoye J.

doi:10.15623/ijret.2015.0406069

Cited by 10 publications

(2 citation statements)

References 8 publications

(8 reference statements)

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“…The components on the rigging that are stressed while the vessel is under sail include the chain-plates, stem piece, and their bolting systems; backstay connections to the stern; toggles and clevis pins; rolled swages; tangs; the actual stays and shrouds, etc. [10].…”

Section: Stress Corrosion Crackingmentioning

confidence: 99%

Analysis of the Effectiveness and Efficiency of the VA Solution on Offshore Pipelines and Ship Materials

Nitonye¹,

Ugboga²

2020

OJMS

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The analysis of the effectiveness and efficiency of Vernomia amydalina (VA) solution as an inhibitor on offshore pipeline and Ship materials (Steel) was carried out with the preparation of the specimen and the VA solution. The specimens were kept in a workable state and the VA Solution (inhibitor) prepared from 1200 g of bitter leaf was plucked, weighed and crushed separately. 600 cl of water was added to each of the crushed leaves. The mixture was put in a filter cloth and squeezed with hand to filter out the active concentration ingredients responsible for corrosion inhibition, which produced a 2 M concentration of VA extract solution. After the experiment was carried out the specimen was air-dried and weighed to determine the corrosion rate and weight loss. This was followed by the determination of the inhibitor efficiency at the different hours and at different percentage/concentration of the VA solution on the specimen. Results were obtained for different hours and at different percentage (0%, 5%, 10%, 15%, 20% and 25% inhibitor)/concentration of the VA solution and graphs plotted. It was observed that at the first week of exposure to corrosive medium there was a substantial reduction in weight of coupons but over the next three weeks there was a gradual decline in weight loss and the corrosion rate reduced evenly. It can be said that the percentage of inhibitor to corrosive medium is insufficient. From the graphs plotted, the inhibitor efficiency is considered high when the concentration of the VA solution is high, which implies a right percentage of inhibitor needs to be administered to obtain good efficiency of the solution. Hence as the weeks go by it was clear that the inhibitor was gradually losing its effectiveness. This means that inhibitors need to be added at regular intervals to sustain the effectiveness of the inhibitor. It is also of vital interest to apply the right concentration of inhibitor since CR increases at high concentrations and temperature. This process did not take into consideration moving water. How to cite this paper: Nitonye, S. and Ugboga, P. (2020) Analysis of the Effectiveness and Efficiency of the VA Solution on Offshore Pipelines and Ship Materials.

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Section: Stress Corrosion Crackingmentioning

confidence: 99%

Analysis of the Effectiveness and Efficiency of the VA Solution on Offshore Pipelines and Ship Materials

Nitonye¹,

Ugboga²

2020

OJMS

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“…There are many other factors that can contribute to corrosion including, but not limited to, the state of stress in the steel, metallurgy of steel, the texture and density of the soil, microbial activity, and stray currents [21] [22].…”

Section: Nature Of Environment Of Exposurementioning

confidence: 99%

Combating Corrosion in Transmission Pipelines in Marine Environment Using Vernomia Amydalina as Inhibitor

Nitonye¹,

Emmanuel²,

Ezenwa³

2018

OJMS

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Pipelines are system of pipes designed to transport liquids, gases or solid/liquid mixtures over long distances. Some are used for domestic, household and sewage purposes. Others are buried underground or submerged in water for transportation of natural oil and gas (O & G) products. In this work, the specimens had to be kept in a workable state and steps were taken to prepare each specimen: all cuts and sheared edges were ground out to prevent them from becoming sites for preferential attack. The finishing of the specimen surface with grit abrasive paper (sand paper) and rinsing of the specimens in distilled water were done. Then degreasing of specimen in acetone and air-dried were carried out. Upon drying, the specimens were immediately weighed to obtain their initial weights. Twelve specimens were used for the test as follows: 6 Aluminum (Al); and 6 mild steel (MS) samples. With a 2 M concentration of Vernomia Amydalina (VA) extract solution, the MS and Al samples were immersed in different plastic containers containing 400 ml of seawater with pH value of 7.25 with no (0%) inhibitor added to it. A 5% (400 ml) of the VA solution was poured into the measuring cylinder for each sample-Al and MS. The specimens were suspended by the strings and completely immersed in the different percentage test media. The same procedure was carried out for each of the different percentages, 10%, 15%, 20%, and 25% and a total of 12 solutions were set up. The experimental procedure used was that seawater of 7.25 pH was obtained from Abonnema water front of Rivers State. At the end of every week (168 hours), the specimens were removed from the corrosive media. Observation and recording of appearance of the specimen noting sites were done. Cleanings of specimen with white handkerchief or tissue paper were carried out and washing of specimen with distilled water, scrubbing of specimen with a soft brush and dipping the spe

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A peony-leaves-derived liquid corrosion inhibitor: protecting carbon steel from NaCl

Nazari

Shihab

Cao

et al. 2017

Green Chemistry Letters and Reviews

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A liquid mixture was developed from waste peony leaves through a zero-waste chemical/biological process. The inhibition effect of different concentrations of peony leaves derived solution (0-3 vol.%, PLS0-3) on C1010 carbon steel in 3.5 wt.% NaCl was investigated over time using electrochemical measurements. Chemical analyses were performed to reveal the main compounds of this inhibitor. Surface analyses together with water contact angle measurements were employed to study the characteristics of the steel surface affected. Semi-empirical calculations with PM3 method were used to find the relationship between molecular structure and inhibiting effect of PLS. The inhibitor was stable over time and its main active ingredients were C 19 H 27 N 4 O 10 P and C 17 H 16 N 3 O 9 P that adsorb onto the steel surface, block cathodic active sites, make the surface hydrophobic, decrease the surface free energy, and facilitate the formation of a passive layer. A good correlation was found between experimentally determined inhibition efficiency and theoretically calculated properties of PLS.ARTICLE HISTORY

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Corrosion Inhibition of Heat Treated Mild Steel With Neem Leave Extract in a Chloride Medium

Abstract: Influence of Neem leave extract on the corrosion inhibition of mild steel in a chloride

Cited by 10 publications

References 8 publications

Analysis of the Effectiveness and Efficiency of the VA Solution on Offshore Pipelines and Ship Materials

Analysis of the Effectiveness and Efficiency of the VA Solution on Offshore Pipelines and Ship Materials

Combating Corrosion in Transmission Pipelines in Marine Environment Using Vernomia Amydalina as Inhibitor

A peony-leaves-derived liquid corrosion inhibitor: protecting carbon steel from NaCl

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