| METALS AND METAL MATRIX COMPOSITES |
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| Inhibition Action and Adsorption Behavior of Sodium Lignosulphonate on Q235 Steel in Simulated Concrete Solution |
| XIE Wanchen, LI Jiansan
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| College of Mechanical and Automobile Engineering, South China University of Technology, Guangzhou 510640 |
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Abstract Inhibition action and adsorption behavior of sodium lignosulphonate on Q235 steel in simulated concrete solution were investigated by means of potentiodynamic polarization and surface analysis techniques. The results indicated that sodium lignosulphonate have good pitting corrosion inhibition for Q235 steel in simulated concrete solution. The inhibition efficiency strengthened with increase of sodium lignosulphonate concentration. The adsorption reaction was a spontaneous exothermic process and followed Langmuir isotherm. It belonged to mix-type adsorption mainly dominated by chemisorption. The coadsorption of sulfonic acid group and Ca2+ belonged to physisorption. Carboxyl and benzene ring structure had coordinated with Fe-3d orbitals, which belonged to chemisorption. Adsorption film of sodium lignosulphonate formed on Q235 steel can reduce adsorption of Cl- so pitting corrosion caused by Cl- can be effectively suppressed.
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Published: 28 April 2019
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| About author:: Wanchen Xie, received her Master Degree of Enginee-ring in 2018 from South China University of Technology with the major of the Safety Science and Engineering, focusing on the research of Corrosion and Corrosion Control of Materials. |
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2019, Vol. 33 
