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Characterization of Corrosion Inhibitor With Contact Angle Measurement

Product Number: 51321-16287-SG
Author: Susumu HIRANO/Ayano YASUI/ Hirotaka MIZUKAMI/Toshiyuki SUNABA
Publication Date: 2021
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Two types of corrosion inhibitors were studied. One of them, is better in adsorption performance in astatic environment such as batch treatment. The other shows better inhibitor efficiency under highshear stress conditions.These inhibitors could be differentiated with contact angle measurements. Thecontact angle is the angle between a tangent to the drop's surface at the contact point and a tangent tothe supporting substrate surface. The shape of the drop reveals the wettability and adhesion betweenthe liquid drop and the substrate material.The steel surface becomes hydrophobic and lipophilic after the inhibitor adsorbing. This is themechanism of corrosion inhibitor performance on metal surfaces.The contact angle was measured onsteel in air or water, where the inhibitor diluted in oil was placed. The two inhibitors showed differentbehaviors. The higher wettability seems favorable for the chemical adsorption on the metal substrate ina flowing system. In this paper, some ideas of contact angle measurement are also discussed. The testmethod describes in this work differentiates such inhibitor behavior clearly. This will provide a fieldoperator an important first step to screen the inhibitors.

Key words: Corrosion Inhibitor, Contact Angle, Adsorption, CO2 Corrosion

Two types of corrosion inhibitors were studied. One of them, is better in adsorption performance in astatic environment such as batch treatment. The other shows better inhibitor efficiency under highshear stress conditions.These inhibitors could be differentiated with contact angle measurements. Thecontact angle is the angle between a tangent to the drop's surface at the contact point and a tangent tothe supporting substrate surface. The shape of the drop reveals the wettability and adhesion betweenthe liquid drop and the substrate material.The steel surface becomes hydrophobic and lipophilic after the inhibitor adsorbing. This is themechanism of corrosion inhibitor performance on metal surfaces.The contact angle was measured onsteel in air or water, where the inhibitor diluted in oil was placed. The two inhibitors showed differentbehaviors. The higher wettability seems favorable for the chemical adsorption on the metal substrate ina flowing system. In this paper, some ideas of contact angle measurement are also discussed. The testmethod describes in this work differentiates such inhibitor behavior clearly. This will provide a fieldoperator an important first step to screen the inhibitors.

Key words: Corrosion Inhibitor, Contact Angle, Adsorption, CO2 Corrosion

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Development of Methodology for Corrosion Inhibitor Characterization

Product Number: 51321-16443-SG
Author: Shuai Ren,/Yi He/ Zineb Belarbi/ Xi Wang/ David Young/ Marc Singer/Maalek Mohamed-Saïd/Sheyla Camperos
Publication Date: 2021
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