Effect of diesel on corrosion inhibitors and application of bio-enzyme corrosion inhibitors in the laboratory cooling water system

Liu, Fang; Zhang, Li; Xi, Yan; Lu, Xianhui; Gao, Ya; Zhao, Chaocheng

doi:10.1016/j.corsci.2015.01.028

Cited by 25 publications

(10 citation statements)

References 34 publications

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“…The average difference of − ∆ * in equation (14) for weight loss and acidimetry was found to be 2.530 kJ/mol and 2.550 kJ/mol respectively, approximately same as the value of RT (2.570 kJ/mol), where T is the average of the temperatures (307 K) at which the research was conducted. This implies that the corrosion process of this metal in the acid medium was unimolecular [8,9].…”

Section: Discussionmentioning

confidence: 99%

“…where θ is the degree of surface coverage, R is the molar gas constant, T is the absolute temperature, and A is a temperature independent factor. Values of heat of adsorption were obtained from the slope ( Values of ΔGads were evaluated using equation (9), where = (1− ) ∆ = − (55.5 )…”

Section: Weight Loss Measurementmentioning

confidence: 99%

“…The most common are application of coatings, anodic and cathodic protections, pH change, alloying and use of inhibitors [5]. A corrosion inhibitor is any substance, which when added to a corrosive environment in small amount reduces the corrosion rate of a material [6][7][8][9]. We have two main class of inhibitors; organic and inorganic.…”

Section: Introductionmentioning

confidence: 99%

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Aspartic Acid as Corrosion Inhibitor of Mild Steel Corrosion Using Weight Loss, Acidimetry and EIS Measurement

Adejo¹,

Yiase²,

Gbertyo

et al. 2018

JAC

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Corrosion inhibition characteristics of aspartic acid on mild steel corrosion in 0.5 M H2SO4 was investigated using weight loss, acidimetry, and electrochemical impedance spectroscopy (EIS). Analysis of the metal surface morphology, uninhibited and inhibited, was carried out through scanned electron microscope. The results showed that the inhibition efficiency increased with increase in inhibitors concentration and rise in temperature for all methods used. The highest v efficiency of 32.36 %, 66.26 % and 80.40 % were obtained for weight loss, acidimetry and EIS, respectively. The low value of efficiency for weight loss compared to other methods should signify the limitation for the method. The increase in efficiency with rise in temperature is a feature of chemical adsorption, which was confoirmed by the value of parameter b of the Adejo-Ekwenchi adsorption isotherm (AEI) model. Values of free energy of adsorption, ?Gads were all negative for all the methods, which means the adsorption processes were spontaneous. The heats of adsorption, Qads values were all positive, implying that the processes were endothermic. Values of activation energy were fairly constant, which is an evident to support the proposed chemical adsorption mechanism. The negative sign in the values of entropy of adsorption, ?Sads is an indication that the activated complex in the rate-determining step was associative. The data obtained was tested with several isotherms, but found to best fit into the El-Awady, Freundlich and Tempkin adsorption isotherm models.

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Section: Discussionmentioning

confidence: 99%

Section: Weight Loss Measurementmentioning

confidence: 99%

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Aspartic Acid as Corrosion Inhibitor of Mild Steel Corrosion Using Weight Loss, Acidimetry and EIS Measurement

Adejo¹,

Yiase²,

Gbertyo

et al. 2018

JAC

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“…It is well known that ATMP has an excellent chelation effect with the positive ion on the steel surface to form a dense clathrate protective film for anticorrosion (Liu et al , 2015). It can also retard the formation of scale and prevent hard water systems from depositing mineral scales.…”

Section: Discussionmentioning

confidence: 99%

Experimental study on under-deposit corrosion and its inhibition using electrochemical methods and electronic coupon technique

Huang

Yang

et al. 2017

ACMM

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Purpose In this study the aim was to investigate under-deposit corrosion (UDC) behavior and the action effects of amino trimethylene phosphonic acid (ATMP) in the oxygen-contained solution. Design/methodology/approach Electrochemical methods and wire beam electrode techniques were used for the study of ATMP action effect for X65 steel under silica sand and CaCO3 particle deposit. Electronic coupon technique was used for the study of galvanic effect caused by the deposits and the action effect of ATMP. Findings ATMP would cause localized corrosion for the silica sand-covered steel. However, it could inhibit the localized corrosion of the steel beneath CaCO3 particle deposit. Galvanic effect test showed that the galvanic effect caused by the deposits was an important factor for the acceleration of UDC. ATMP had an obvious promotion effect for the galvanic current between bare coupon and silica sand covered coupon and different degrees of localized corrosion were observed beneath both deposits. Originality/value The authors believe that the paper may be of particular interest to the readers of the journal as the measurement methods for the UDC of X65 pipeline steel. The experiment they did in the laboratory found that the inhibitor ATMP has a good inhibition effect for bare steel, but it would accelerate the UDC. Different kinds of deposits would have different influences for the UDC behavior with inhibitor added.

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“…Organic compounds are most frequently utilized inhibitors among the several accessible methods of corrosion prevention such as like coating and painting, anodic and cathodic protections, alloying and de-alloying etc. The criteria behind their commercial uses are based on their easily availability, highly effectiveness and ease of application in addition to their economic synthesis using commercially available raw starting chemicals [10][11][12][13][14]. Generally, these compounds strongly interact through their -and non-bonding electrons with metallic surface and form protective surface film via coordination bonds.…”

Section: Economic Importancementioning

confidence: 99%

Volatile corrosion inhibitors for ferrous and non-ferrous metals and alloys: A review

Ansari¹,

Verma²,

Siddiqui³

et al. 2018

Int. J. Corros. Scale Inhib.

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Volatile corrosion inhibitors (VCIs) or vapor phase inhibitors (VPIs) represent a class of compounds that are employed to protect the corrosion or oxidation of ferrous and nonferrous metals and alloys where other surface treatments are impractical. The VCIs release slowly inside the sealed airspace and actively adsorb and prevent corrosion. Several VCIs have been employed as effective inhibitors for several metals like iron, zinc, aluminum, etc. and their alloys. Literature study revealed that VCIs protect metallic corrosion either by forming a surface protective film on the metal surface or neutralizing the corrosive surrounding reagents H 2 O, SO 2 , H 2 S and CO 2 , etc. Because of the high volatility, VCIs easily vaporize and their vapors condense on the metallic surface as well as the volume available in the crevices, pores and cracks thereby gives complete protection where they used. The VCIs can be inserted into coatings, foams, adhesives, powders, sprays and plastics. Several VCIs are known those act as effective inhibitors by themselves and few other VCIs are also known those hydrolyzed products act as corrosion inhibitors. The inhibition ability as well as quantity of the adsorbed VCIs on metallic surfaces can be determined by several commonly employed techniques such as contact angle, radiotracer, polarographic and electrocapilarity methods. Present review article describes the assortment of previous works published on VCIs as corrosion inhibitors for ferrous and non-ferrous metals and alloys. The present report also deals with salient features of VCIs and mechanism of their action.

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Effect of diesel on corrosion inhibitors and application of bio-enzyme corrosion inhibitors in the laboratory cooling water system

Cited by 25 publications

References 34 publications

Aspartic Acid as Corrosion Inhibitor of Mild Steel Corrosion Using Weight Loss, Acidimetry and EIS Measurement

Aspartic Acid as Corrosion Inhibitor of Mild Steel Corrosion Using Weight Loss, Acidimetry and EIS Measurement

Experimental study on under-deposit corrosion and its inhibition using electrochemical methods and electronic coupon technique

Volatile corrosion inhibitors for ferrous and non-ferrous metals and alloys: A review

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