INHIBITION BEHAVIOUR OF N-ALKYL LAURYL AMIDE FOR CARBON STEEL IN SULPHURIC ACID SOLUTION

J Chin Soc Corr Pro

1997, Vol. 17

Issue (1): 68-72 DOI:

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INHIBITION BEHAVIOUR OF N-ALKYL LAURYL AMIDE FOR CARBON STEEL IN SULPHURIC ACID SOLUTION

ZENG Lingsan LIANG Benxi ZHANG Yaolong TANG Huiyao (Chemistry & Chemical Engineer Department; Hunan University)

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Abstract By electrochemical method and weight loss measurements, the inhibition and adsorption behaviour of N-alkyl lauryl amide (NALA) on carbon steel in sulphuric acid solution was studied. NALAexhibited reasonable corrosion inhibition performance. When concentration of NALA exceeded 0.60mmol/L, its inhibition efficiency reached more than 90%. Polarization measurements showed NALA mainly hindered anodic process. Its adsorption process was an exothermic reaction, and could be attributed to chemical adsorption. There was a transition point on isothermal adsorption curve (θtrans=90.5%). When θ<θ trans, Temkin adsorption isothemal equation was followed. When θ>θ trans, Frumkin adsorption isothermal equation was obeyed.

Key words: Surfactant Corrosion inhibitor Lauryl amide

Received: 25 February 1997

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ZENG Lingsan LIANG Benxi ZHANG Yaolong TANG Huiyao (Chemistry & Chemical Engineer Department; Hunan University). INHIBITION BEHAVIOUR OF N-ALKYL LAURYL AMIDE FOR CARBON STEEL IN SULPHURIC ACID SOLUTION. J Chin Soc Corr Pro, 1997, 17(1): 68-72.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1997/V17/I1/68

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