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Corrosion Inhibition Of Automotive Parts In Water-Ethylene Glycol Solutions

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The efforts to lower automotive component weight to make cars more fuel efficient has increased the demand for aluminum alloys. In these applications, substantial amounts of heat are generated due to engine combustion, making it necessary to cool the engine systems. Metals in an engine application will rely on coolant to transfer heat. Corrosion behavior is another consideration for metals. Aluminum alloys, similar to the metals they are replacing, are sensitive to corrosion, especially in an aqueous alkaline environment.

Product Number: 51322-17593-SG
Author: Behzad Bavarian, Koushik Kosanam, Lisa Reiner
Publication Date: 2022
Industries: Corrosion Monitoring and Control , Coatings
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$20.00
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Commercially available vapor phase corrosion inhibitors were evaluated to determine their corrosion inhibition for aluminum alloys in a water-ethylene glycol (C2H6O2) mixture. When the temperature exceeds 80°C, ethylene glycol can decompose into organic acids. The resulting acid environments cause severe corrosion of aluminum alloys. Electrochemical and constant immersion tests were carried out to study the effects of several inhibitors. The corrosion behavior was studied at multiple temperatures. Corrosion inhibitor VCI-A at 2.5% dosage showed excellent corrosion protection. It maintained a steady, low corrosion rate during long term exposure by neutralizing pH and forming a hydrophobic film. VCI-B inhibitor, also showed the ability to reduce the corrosion rate of aluminum in ethylene glycol solutions. However, due to its high pH chemistry, the effective dosage should be maintained at 2.5% to avoid any potential increase in pH that can promote localized corrosion or under-deposit corrosion attacks. The results of this investigation demonstrated that both inhibitors can lower the corrosion rate in water-ethylene glycol solutions by neutralizing pH and forming stable films.

Commercially available vapor phase corrosion inhibitors were evaluated to determine their corrosion inhibition for aluminum alloys in a water-ethylene glycol (C2H6O2) mixture. When the temperature exceeds 80°C, ethylene glycol can decompose into organic acids. The resulting acid environments cause severe corrosion of aluminum alloys. Electrochemical and constant immersion tests were carried out to study the effects of several inhibitors. The corrosion behavior was studied at multiple temperatures. Corrosion inhibitor VCI-A at 2.5% dosage showed excellent corrosion protection. It maintained a steady, low corrosion rate during long term exposure by neutralizing pH and forming a hydrophobic film. VCI-B inhibitor, also showed the ability to reduce the corrosion rate of aluminum in ethylene glycol solutions. However, due to its high pH chemistry, the effective dosage should be maintained at 2.5% to avoid any potential increase in pH that can promote localized corrosion or under-deposit corrosion attacks. The results of this investigation demonstrated that both inhibitors can lower the corrosion rate in water-ethylene glycol solutions by neutralizing pH and forming stable films.

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Picture for Corrosion Inhibitor Encapsulation For Enhanced Chemical Efficiency And Performance
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Corrosion Inhibitor Encapsulation For Enhanced Chemical Efficiency And Performance

Product Number: 51322-17548-SG
Author: Fang Cao, James Oxley, Yao Xiong, Satish Bodige, Dennis Schmatz
Publication Date: 2022
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Corrosion of pipelines made of carbon steel and exposed to wet hydrocarbons containing CO2 and H2S is a common but serious problem encountered in petroleum industry and its occurrence causes enormousexpense due to production downtime, accidental injuries, and replacement costs. Control and prevent corrosion using chemical treatment (e.g. corrosion inhibitor injection) is one of the most cost-effective solutions and commonly practiced methods to prevent corrosion failures in pipelines in oil and gas industry. Generally speaking, the active corrosion inhibitor (CI) components in commercial CI packages are usually organic, nitrogen-based surfactants such as amines, imidazoline and its derivatives. Due to the amphiphilic nature of surfactants, a good fraction of the injected CI will inevitably go into the oil phase through partitioning and to the oil/water interface.
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Corrosion Inhibition Of Carbon Steel In Carbonate Acidizing At Elevated Temperature

Product Number: 51322-17562-SG
Author: Limin Xu, Tao Chen, Ming Han, Mohammed Bataweel
Publication Date: 2022
$20.00

A suitable acid package in matrix acidizing application is very important to the stimulation employed to improve the productivity of carbonate reservoirs. Typically, concentrated acids between 5 and 28 wt% are used and the most used mineral acid for carbonate acidizing treatment is hydrochloric acid (HCl) 1,2. A significant challenge of acidizing treatment is corrosion loss of metal tubulars due to the high reactivity of acid and metal, especially at high temperatures. Corrosion inhibitors are needed to reduce the corrosion loss of steel surface of facilities exposed in acidic environment.
Picture for Corrosion Inhibitors Use: Case Study For Guinea Gulf Assets Application
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Corrosion Inhibitors Use: Case Study For Guinea Gulf Assets Application

Product Number: 51322-17663-SG
Author: Alvaro Mpaka Sousa, Laurent Dehays, Francisco Mateus Garcia, Mioara Stroe, Raquel Eduarda Araujo
Publication Date: 2022
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Carbon steel (CS) material is widely used for the equipment in oil and gas production industry due to its mechanical properties associated with a relatively low cost, compared to other materials. Depending on the corrosiveness of the fluid that is vehiculated, the use of carbon steel is generally associated with the injection of a corrosion inhibitor (CI) in order to mitigate internal corrosion. Corrosion inhibitors are generally used in continuous injection at an injection rate that is depending on the corrosiveness of the fluid. Based on the operational feedback, the internal standards are recommending for multiphase pipelines CI injection rates in the range of 50 - 70 ppm for temperature below 80°C of and of 150 to 200ppm for temperatures above 100°C. These injection dosages are typical values that are considered in the laboratory tests for the qualification of the CI and they are adjusted on-site based on the monitoring results.
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