Citation: Zhao Guokai, Han Yongqi, Li Gaoyang, Li Mengli, Liu Xingyu, Zhao Huiling, Wang Xiaoyong. Corrosion Inhibition Effect of Zein/SDS Complex on Carbon Steel[J]. Chemistry, ;2020, 83(6): 564-568. shu

Corrosion Inhibition Effect of Zein/SDS Complex on Carbon Steel

School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237

Corresponding author: Wang Xiaoyong, xiaoyong@ecust.edu.cn
Received Date: 15 January 2020
Accepted Date: 10 February 2020

Figures(6)

The corrosion inhibition effect of zein/SDS complex on carbon steel was studied by weight loss method, scanning electron microscope and polarization curve method. In 1mol/L hydrochloric acid solution, the corrosion inhibition rate of carbon steel by adding 0.05 ‰ zein is 65.5%, and the addition of zein/SDS complex (0.05‰ zein+0~8mmol/L SDS) can gradually increase the corrosion inhibition rate of carbon steel to 90.1%. With the increase of SDS concentration in the zein/SDS complex, the surface of the carbon steel gradually changed from overall deep pit corrosion to local pitting corrosion, and eventually flattened. The polarization curve test showed that the zein/SDS complex can effectively inhibit the occurrence of electrode reactions on the surface of carbon steel. The ΔG_ads value of the surface adsorption of pure zein with carbon steel indicated that electrostatic adsorption is the main force between zein and the surface of carbon steel, and the corrosion inhibition effect of zein/SDS complex on carbon steel mainly comes from the coordination adsorption between zein and carbon steel, which is related with the conformation change of zein induced by the electrostatic repulsion between SDS micelle-like aggregates.
- Metal corrosion,
- Zein,
- Surfactant,
- Weight loss method,
- Polarization curve
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